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Celebrating the independent kiwi spirit of invention.


Original list by Ian Mander started 1 February 2008. Added to this site (Aqualab) 26 November 2008. Database released 27 May 2009.
Please note that the date mentioned below that the database code was last updated is not the date the data itself was last updated.

Driver List
Database code 2 January 2018
Footnotes 10 August 2016

Step-up drivers
Low voltage step-down drivers

Mains drivers
User interface & PWM drivers

Drivers not yet added
3 March 2012
Links
28 February 2012

Why use a driver?
20 February 2010

Driver types overview
15 September 2010


LED Driver List – low voltage step-down LED drivers

An O-ring, Tailcap & Silicone Grease List is also available.

Video Foundry/Aqualab does not sell any of these drivers. Links are provided to resellers. The short URL for this list is www.videofoundry.co.nz/driverlist. See the bottom of the page for my email address. If you're just a spam bot looking for fodder, spam the hell out of these spammers' addresses: spammer address 1, spammer address 2, spammer address 3. They deserve a taste of their own spam.

Jump to: Footnotes & Instructions | AMC7135 notes | PT4105 notes | Schottky diodes.

377 step-down drivers found. Listed by driver name.

Driver Name

SKU or catalogue #

Retailer

Price (US$)
(shipping incl unless
otherwise stated)

Driver Type

Driver Purpose

Vin min-max
(DC except where noted)
Number of LEDs in series
min-max
Battery Suitability Efficiency
min-max

Output Current
(off the shelf)

Max current (with just a resistor modification)

Number of Modes Size
(diameter except where noted)

Notes

Recent updates

Recently added

Show only SKUs containing

from $
to $

Stock level


from
to

Driver can power

LEDs incl with driver

    (instead of off-the-shelf current)
from
to

from
to
 

"10W" MR16 driver

1110703

FastTech

$1.61

MR16 (buck) driver

12-12 V DC; also works with AC 3 12 V AC or DC  

650 mA

1 17 mm x 13 mm x 10 mm Driver chip MT7201. One of the threads highlights some inconsistency with the input and output figures - buyer beware.

Last updated 22 Mar 2015.

(1-3)*2W MR16 driver

3507000

FastTech

$1.48

MR16 (buck) driver

12-17 V DC; also works with AC 1-3 12 V AC or DC  

600 mA

1 29 mm x 18 mm x 10 mm Output voltage 9-11 V.

Last updated 6 Feb 2016.

(1-3)x5W MR16 driver

LX0210X

Focalprice

$5.51

MR16 (buck) driver

12-12 V DC; also works with AC 1-3   88%

960 mA

1 70 mm x 18 mm x 15 mm Efficiency is manufacturer claimed maximum, typical efficiency unknown. The stated length probably includes the LED leads. Duh.

Last updated 17 Mar 2015.

1-3x 3 Watt Dimmable Constant Current LED Driver

792

Best Hong Kong

$9.95 + shipping

Buck driver

10-24 V DC; also works with AC 1-3 ≥3x Li-ion, 12 V car battery  

800 mA
constant current

1 35 mm x 31 mm diameter Dimmable with trim adjustment 30-800 mA.

Last updated 10 Jun 2011.

1-6x 1 W driver

907

Best Hong Kong

$5.95 + shipping

Buck driver

4.0-24 V DC; also works with AC
(max. 16 V AC)
1-6    

350 mA

1 25 mm x 19 mm x 18 mm Minimum input voltage is a guess.

Last updated 12 Jun 2011.

1.2 A buck driver

S008848

KaiDomain

$2.83
(down from $3.21)
(sold out and/or discontinued)

Buck driver

3.0-9.0 V 1    

1200 mA

1 17 mm Unknown input voltage range; even the web page title has two ranges (6-9 V and 3.0-9.5 V). Claimed 1.2 A maximum output current implies it's not a constant current driver. It's also not good considering a 1 A Schottky diode is used. Buyer beware.

Formerly product ID 9912.

Last updated 21 Nov 2011.

1.2A, 5 mode driver

162783

DealExtreme

$3.70 for 2

Step-down (non-buck) driver

2.7-4.2 V 1 1x Li-ion  

1200 mA

5 17 mm Actual output current said to be 1100-1300 mA. Five modes, memory unknown; high, medium (50%), low (10%), fast strobe (8 Hz), SOS. Unknown regulation method, possibly just PWM modes. Compare with DX 162783.

Last updated 17 Mar 2015.

1.3 A buck driver

S008368

KaiDomain

$8.98
(sold out and/or discontinued)

Buck driver

3.0-26 V 1    

1300 mA

1 20 mm Formerly product ID 9265.

Last updated 21 Nov 2011.

1.4A, 5 mode driver

162807

DealExtreme

$5.20 for 2

Step-down (non-buck) driver

2.7-4.2 V 1 1x Li-ion  

1400 mA

5 17 mm 5 modes with memory; high, medium (50%), low (10%), fast strobe (8 Hz), SOS. Unknown regulation method - possibly just PWM modes. Polarity protection. Compare with DX 162783.

Last updated 17 Mar 2015.

1.5A bike light driver

166085

DealExtreme

$4.30

Buck driver

7.4-8.4 V 1 2x Li-ion  

1500 mA

3 22 mm x 15 mm high (components on both sides) 3 mode; high, low, strobe. A momentary switch (included) cycles through modes. The minimum input voltage of 7.4 V is hopefully higher than what it will actually accept.

Last updated 17 Mar 2015.

1.7A, 5 mode driver

351523

DealExtreme

$4.31
(backordered)

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1700 mA

5 17 mm 5 modes, unknown memory; high, medium, low, fast strobe, SOS.

Last updated 23 Jun 2015.

1/3/4 LED boost/buck

p-542

Intl Outdoor Store

$12.50
(sold out and/or discontinued)

Boost driver and buck driver

3.0-18 V 1-4 1-4x Li-ion  

2800 mA

3 26 mm x 17 mm high - two boards in double layer Driver removed from site.

Output current 5 A for 1 LED, 2.6-3.0 A for 3-4 LEDs; apparently not suited for 2 LEDs. Three modes with memory; high, medium (30%), low (5%). PWM frequency 1 kHz. Thermal protection and low voltage warning.

Last updated 18 Jan 2016.

1000mA 3 mode LED driver

128089

DealExtreme

$3.10 for 2

Linear regulator

3.7-4.2 V 1 1x Li-ion  

1000 mA

3 17 mm Assumed to be a linear regulator. Main chip is marked CAB1x. Three modes; high, low, strobe.

Last updated 17 Mar 2015.

1000mA, 3 mode LED Driver

128271

DealExtreme

$3.30 for 2

Linear regulator

3.7-4.2 V 1 1x Li-ion  

1000 mA

3 17 mm 3 mode; high, low, slow strobe. Unknown regulation method, assumed to be a linear regulator not just a PWM driver.

Last updated 17 Mar 2015.

1000mA, 5 mode LED driver

128273

DealExtreme

$3.70 for 2

Linear regulator

3.7-4.2 V 1 1x Li-ion  

1000 mA

5 17 mm 5 mode; high, medium, low, fast strobe, SOS. Unknown regulation method, assumed to be a linear regulator not just a PWM driver.

Last updated 17 Mar 2015.

10W Angel Eyes (2 pack)

150221

DealExtreme

$72.80

Buck driver

6.0-24 V 1

8 LEDs included

12 V automotive  

2000 mA

1 60 mm x 30 mm x 30 mm Output voltage 3-6 V. Output power 10 W; output current is a wild guess.

Comes with 4 LEDs per driver, 8 total. Designed for angel eye replacements for BMW.

Last updated 17 Mar 2015.

10W low voltage AC driver

220150

DealExtreme

$4.90

Buck driver

12-24 V DC; also works with AC 1-3 12 V or 24 V AC 85%

900 mA
constant current

1 66 mm x 25 mm x 20 mm Output voltage 3-10 V. IP67 dust/water rating.

Last updated 17 Mar 2015.

1A buck driver

1178004

FastTech

$5.28
(up from $5.02)
(backordered)

Buck driver

12-14 V 3 12 V automotive  

1000 mA

1 43 mm x 24 mm x 8 mm Unknown main chip; it has been sanded.

Last updated 18 Mar 2015.

1A buck/boost driver

p-674

Intl Outdoor Store

$9.97
(sold out and/or discontinued)

Boost driver and buck driver

2.7-5.5 V 1 1x Li-ion
3-4x NiMH
84-95%

1000 mA
constant current

2 17 mm x 6.5 mm high - two boards in double layer Driver removed from site.

Two modes; high (1 A), medium (unknown current). Low voltage protection, polarity protection.

Last updated 18 Jan 2016.

1A, 1 mode driver

S010093

KaiDomain

$10.42 for 5
(up from $8.42)

Buck driver

3.0-18 V 1    

1000 mA

1 17 mm Incomplete specifications given. Said to be a Cree XM-L driver but only has an output of 1 A.

Formerly product ID 11360.

Last updated 21 Nov 2011.

1A, 5 mode driver

351520

DealExtreme

$3.90

User interface driver

3.0-4.5 V 1 1x Li-ion  

1000 mA

5 17 mm 5 mode with memory; high, medium, low, strobe, SOS. Polarity protection, low voltage warning. Current regulation method unclear - buyer beware.

Last updated 17 Mar 2015.

1W MR16 driver

398922

DealExtreme

$6.64 for 10

MR16 (buck) driver

12-17 V DC; also works with AC 3 12 V DC  

300 mA

1 29 mm x 18 mm x 10 mm Output voltage 9-10 V.

Last updated 6 Feb 2016.

1x 1 W LED driver B350B12D1-1

443

Best Hong Kong

$5.95 + shipping

Buck driver

12-12 V 1    

350 mA
constant current

1 23 mm x 19 mm x 14 mm

Last updated 10 Jun 2011.

1x 3 W LED driver B700B12D3-1

446

Best Hong Kong

$5.95 + shipping

Buck driver

12-12 V 1    

700 mA
constant current

1 23 mm x 19 mm x 14 mm

Last updated 10 Jun 2011.

1x 5 W LED driver B700B12D5-1

448

Best Hong Kong

$5.95 + shipping
(sold out and/or discontinued)

Buck driver

12-12 V 1    

700 mA
constant current

1 23 mm x 19 mm x 14 mm Product removed from site; probably replaced by the 1-6x 1W driver.

Last updated 12 Jun 2011.

1x AMC7135

1122402

FastTech

$1.19

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 17 mm Linear regulator using 1x AMC7135 chip. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

1x AMC7135

530002

Lights Castle

$17.86 for 20

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 17 mm Linear regulator using 1x AMC7135 chip. Polarity protected. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

1x AMC7135 chip, 350mA

1124200

FastTech

$1.88 for 10
(up from $1.85)

Linear regulator

2.7-6.0 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 5 mm x 4 mm x 2 mm Single AMC7135 linear regulator chip (10 pack). Note - surface mount. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

1x AMC7135 chip, 350mA

1124300

FastTech

$11.09 for 100
(down from $12.99)

Linear regulator

2.7-6.0 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA

1 5 mm x 4 mm x 2 mm Single high output AMC7135 linear regulator chip (100 pack). Note - surface mount. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

1x AMC7135 chip, 380mA

1197600

FastTech

$2.41 for 10

Linear regulator

2.7-6.0 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

380 mA
constant current

1 5 mm x 4 mm x 2 mm Single high output AMC7135 linear regulator chip (10 pack). Note - surface mount. See extra AMC7135 notes below.

Last updated 14 Mar 2014.

1x AMC7135 on empty star

1133803

FastTech

$2.37 for 3

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 20 mm star board Linear regulator using 1x AMC7135 chip mounted on a LED star. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

1x AMC7135 on star with 1W LED

1134701

FastTech

$1.73

Linear regulator

3.3-6.6 V 1

1 LED included

1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 20 mm star board Linear regulator using 1x AMC7135 chip mounted on an LED star board. See extra AMC7135 notes below.

Includes a generic 1 W warm white LED.

Last updated 17 Mar 2015.

1x AMC7135, LEDROAD LED-153603

3647301

FastTech

$1.15

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

350 mA
constant current

1 20 mm Linear regulator using 1x AMC7135 chip. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

1x AMC7135
(Nanjg 10)

60

PCB Components

$5.70 (approx)
€3.95 (actual) + shipping

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

330 mA
constant current

1 17 mm Linear regulator using one AMC7135 chip (thus the pictured driver is not this one). Note that the claimed input voltage doesn't allow for the polarity protection diode; the correct figures are listed in this table. See extra AMC7135 notes below.

Last updated 13 Feb 2012.

1x1W bulb driver

1110714

FastTech

$1.49

MR16 (buck) driver

12-17 V DC; also works with AC 1 12 V AC or DC  

300 mA

1 18 mm x 14 mm x 10 mm Output current is assumed. Unknown driver chip. Typical MR16 bulb driver but without the pins.

Last updated 22 Mar 2015.

1x2W 12V driver

2085201

FastTech

$4.70 for 2

MR16 (buck) driver

12-12 V DC; also works with AC 1

2 LEDs included

12 V DC  

600 mA

1   Output voltage 3-4 V. Unknown driver size.

Includes 2 LG warm white LEDs.

Last updated 17 Mar 2015.

1x2W 12V driver

2085203

FastTech

$4.70 for 2

MR16 (buck) driver

12-12 V DC; also works with AC 1

2 LEDs included

12 V DC  

600 mA

1   Output voltage 3-4 V. Unknown driver size.

Includes 2 LG cool white LEDs.

Last updated 17 Mar 2015.

1x2W 12V driver

2085205

FastTech

$4.66 for 2

MR16 (buck) driver

12-12 V DC; also works with AC 1

2 LEDs included

12 V DC  

600 mA

1   Output voltage 3-4 V. Unknown driver size.

Includes 2 LG warm white LEDs.

Last updated 17 Mar 2015.

1x2W 12V driver

2085207

FastTech

$4.66

MR16 (buck) driver

12-12 V DC; also works with AC 1

2 LEDs included

12 V DC  

600 mA

1   Output voltage 3-4 V. Unknown driver size.

Includes 2 LG cool white LEDs.

Last updated 17 Mar 2015.

1x3W MR16 driver

1110711

FastTech

$1.49

MR16 (buck) driver

7.0-18 V DC; also works with AC 1 12 V AC or DC  

650 mA

1 18 mm x 14 mm x 10 mm Uses CL6807 driver chip (see notes on CL6807 below). There's a nice review of the driver on the site.

Last updated 22 Mar 2015.

1x AMC7135
(Nanjg 10)

3160

DealExtreme

$16.68 for 20
(sold out and/or discontinued)

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

350 mA
constant current

1 17 mm Clearance price $13.39.

Linear regulator using AMC7135 chip. See extra AMC7135 notes below.

Last updated 13 Sep 2012.

2*2W MR16 driver

402019

DealExtreme

$5.87 for 10

MR16 (buck) driver

12-17 V DC; also works with AC 2 12 V AC/DC  

480 mA

1   Exact specs unknown.

Last updated 6 Feb 2016.

2.5-3.0 A, 3 mode driver

128269

DealExtreme

$4.20
(down from $4.99
up from $4.70)
(sold out and/or discontinued)

Buck driver

4.5-18 V 1-3    

2500 mA

Can be modified to 3000 mA

3 22 mm x 12 mm high Update Jan 2016: Some changes made to the driver, unknown what change to specs these have.

3 mode; high, low, fast strobe. Output current said to be 2500-3000 mA. Assumed to be suitable for 1-3 LEDs. Driver fitted with a couple SS34 Schottky diodes. Possibly the same as Lights Castle 530016. An alternative is DX sku.57779.

Last updated 3 Feb 2017.

2.6A, 5 mode driver

351550

DealExtreme

$5.56
(sold out and/or discontinued)

Buck driver

3.0-8.0 V 1 1-2x Li-ion  

2600 mA

5 22 mm 5 modes, unknown memory; high, medium, low, strobe, SOS. Polarity protection.

Last updated 3 Feb 2017.

2.8A buck driver

1143100

FastTech

$5.59

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

2800 mA

5 21 mm x 10 mm high - two boards in double layer Buck driver with components on both sides of main board. Larger dummy board for battery contact. 5 modes in 2 groups; low (5%), medium (50%), high (100%), strobe, SOS. Alternate group by half press. Low voltage warning at 3.0 V and 5.8 V.

Last updated 17 Mar 2015.

2.8A Cree XM-L driver

p-324

Intl Outdoor Store

$4.98
(up from $4.68)
For 1-2: + shipping
(sold out and/or discontinued)

Buck driver

6.0-18 V 1-3 2-4x Li-ion  

2800 mA
constant current

3 22 mm x 16 mm high - two boards in double layer Driver removed from site.

3 modes; high, low (20%), strobe. Low soltage protection, reverse polarity protection. Presumably the same as DX sku.57779.

Last updated 18 Jan 2016.

2.8A, 5 mode LED driver

LFF05B

Focalprice

$6.06

Buck driver

5.0-8.4 V 1 2x Li-ion 85%

2800 mA

5 25 mm 5 modes, unknown memory or relative levels; high, medium, low, fast strobe, SOS. Minimum input voltage is a guess. Efficiency is manufacturer claim.

Last updated 17 Mar 2015.

2.8A, 8.4V 4 mode LED driver

S023147

KaiDomain

$4.62

Buck driver

8.4-8.4 V 1 2x Li-ion  

2800 mA

4 22 mm 4 modes; high, medium, low, strobe (long press for 3 seconds).

Last updated 17 Mar 2015.

2A driver

1675105

FastTech

$6.36

Step-down (non-buck) driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

2000 mA

1 16 mm Unknown regulation method - possibly none, just PWM. Unknown modes. Output voltage 3.2-3.8 V.

Includes a Cree XM-L (T6 bin) cool white LED.

Last updated 17 Mar 2015.

2A driver

1675104

FastTech

$6.80

Step-down (non-buck) driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

2000 mA

1 16 mm Unknown regulation method - possibly none, just PWM. Unknown modes. Output voltage 3.2-3.8 V. Output voltage 3.2-3.8 V.

Includes a Cree XM-L2 (T6 bin) cool white LED.

Last updated 17 Mar 2015.

2A driver

1685400

FastTech

$6.62

Step-down (non-buck) driver

3.2-4.2 V 1

1 LED included

1x Li-ion  

2000 mA

1 16 mm Unknown regulation method - possibly none, just PWM. Unknown modes. Output voltage 3.2-3.8 V.

Includes a Cree XM-L (T6 bin) cool white LED on a copper base.

Last updated 17 Mar 2015.

2A driver

1685401

FastTech

$5.96

Step-down (non-buck) driver

3.2-4.2 V 1

1 LED included

1x Li-ion  

2000 mA

1 16 mm Unknown regulation method - possibly none, just PWM. Unknown modes. Output voltage 3.2-3.8 V.

Includes a Cree XM-L (T6 bin) cool white LED on a copper base.

Last updated 17 Mar 2015.

2A driver

1685402

FastTech

$5.95

Step-down (non-buck) driver

3.2-4.2 V 1

1 LED included

1x Li-ion  

2000 mA

1 16 mm Unknown regulation method - possibly none, just PWM. Unknown modes. Output voltage 3.2-3.8 V.

Includes a Cree XM-L (T4 bin) warm white LED on a copper base.

Last updated 17 Mar 2015.

2x 1 W LED driver B350B12D1-2

444

Best Hong Kong

$6.49 + shipping

Buck driver

12-12 V 2    

350 mA
constant current

1 23 mm x 19 mm x 14 mm

Last updated 10 Jun 2011.

2x AMC7135

1127408

FastTech

$1.42

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

700 mA
constant current

1 17 mm Linear regulator using 2x AMC7135 chips. Polarity protected. See extra AMC7135 notes below.

Last updated 14 Mar 2014.

2x AMC7135

1122403

FastTech

$1.66

Linear regulator

3.0-6.3 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

700 mA
constant current

1 17 mm Linear regulator using 2x AMC7135 chips. Polarity protected (assumed to be Schottky diode). See extra AMC7135 notes below.

Last updated 17 Mar 2015.

2x AMC7135

351519

DealExtreme

$2.92

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1   50-97%

700 mA
constant current

1 17 mm Go for the cheaper DX sku.26109 if you don't want the polarity protection diode.

Last updated 17 Mar 2015.

2x AMC7135

530010

Lights Castle

$3.72

Linear regulator

2.7-6.0 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

700 mA
constant current

1 17 mm Linear regulator using 2x AMC7135 chip. Polarity protected. See extra AMC7135 notes below. Apparently has a capacitor instead of a diode, so no polarity protection.

Last updated 6 Feb 2016.

2x AMC7135 (TR-025,
formerly TR-0050 or TR-0025,
formerly TR-025)

26109

DealExtreme

$2.69
(formerly $2.19)

Linear regulator

2.7-6.0 V
(no polarity protection diode - see notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

700 mA
constant current

1 17 mm Buyer beware: As of September 2012 these are still being sent out with both 2xAMC7315 and 3xAMC7135. As of November 2012 (and maybe earlier) DX's description says 700 mA.

Latest version: TR-025 (again). Three AMC7135 chips with space on the board for a fourth.

Previously: Caution: The TR-0050 (also labelled as TR-0025) has replaced the TR-025. It is a different board and ships with only 2 or 3 AMC7135 chips and for some reason a capacitor between battery positive and battery negative. Does not have a polarity protection diode. See extra AMC7135 notes below.

TR-025 (discontinued): Apparently a four AMC7135 linear current regulator but identifying marks have very roughly been removed for photos.

Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT.

Last updated 30 Sep 2014.

2x AMC7135 on empty 20mm star board

1124400

FastTech

$1.32

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

700 mA
constant current

1 20 mm star board Linear regulator using 2x AMC7135 chips mounted on LED star. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

2x AMC7135, LED-120219

3647200

FastTech

$1.32

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
3-4x alkaline
50-97%

700 mA
constant current

1 17 mm Linear regulator using 2x AMC7135 chips. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

2x AMC7135
(Nanjg 10)

59

PCB Components

$7.80 (approx)
€4.45 (actual) + shipping

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

670 mA
constant current

1 17 mm Linear regulator using two AMC7135 chips (thus the pictured driver is not this one). Note that the claimed input voltage doesn't allow for the polarity protection diode; the correct figures are listed in this table. See extra AMC7135 notes below.

Last updated 13 Feb 2012.

2x AMC7135
(Nanjg 10)

3146

DealExtreme

$20.18 for 20

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

700 mA
constant current

1 17 mm Linear regulator. Also see DX sku.26109. See extra AMC7135 notes below.

Last updated 14 May 2012.

3 mode, 700 mA

S008366

KaiDomain

$3.40
(up from $3.35)

Step-down (non-buck) driver

3.7-4.2 V 1 1x Li-ion  

700 mA

1 17 mm Very incomplete specs given, and specs given in the title are bad (mA/h is non-sensical). Three modes with no mode memory; low (unknown %), high, strobe.

Formerly product ID 9263.

Last updated 21 Nov 2011.

3 W Buck, 5 mode

7425

DealExtreme

$3.45
(sold out and/or discontinued)

Buck driver

3.6-8.4 V 1 3-6x NiMH,
1-2x Li-ion
 

1000 mA

5 17 mm - two boards in double layer Buck driver using PWM for modes, although what exactly the modes are seems to vary - high, low, slow strobe, fast strobe, and either SOS or beacon (1 flash every 8 or 10 seconds). High is 700-1000 mA depending on input voltage. Apparently based on PT4105 chip - see separate notes below - and may be able to cope with higher input voltage.

Last updated 16 Mar 2012.

3 W PWM Step-down, 5 mode

7426

DealExtreme

$2.70 for 2 (formerly $2.38)

Step-down (non-buck) driver

3.6-3.6 V 1 3x NiMH,
1x Li-ion
 

1000 mA

5 16 mm Unknown regulation method; no inductor so assumed to be just PWM, possibly with output smoothing using a capacitor. 5 modes, 3 of which are flashing; high, low, slow strobe, fast strobe, SOS. However, reviewers describe different sets of modes, such as high, medium, low, strobe, SOS; or high, low, slow strobe, fast strobe, 10 second beacon flash. Photos posted show a different IC to DX's photos.

Tip: This board may possibly operate as a straight-forward PWM driver if the capacitor is removed.

Last updated 1 Aug 2011.

3*AMC7135
(GCOOL, code switching)

p-435

Intl Outdoor Store

$6.95 + shipping
(sold out and/or discontinued)

Linear regulator

2.9-4.5 V
(for possibly 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
66-97%

1050 mA
constant current

4 17 mm Driver removed from site.

Linear regulator using three AMC7135 chips and a micro controller for PWM mode control. 4 modes with memory; firefly (3-4 mA), medium (200 mA), high, strobe. Modes are changed normally (forward clicky recommended) or by using a code to select the mode you want. Polarity protection. Low voltage protection; at 3.3V the current will drop to 2 mA, and switches off within 3 seconds of hitting ~2.9 V - unclear if this is a designed feature or just the way the AMC7135 works. PWM speed >4 kHz. Comes with spring on positive terminal and a ground wire on the top of the board. See extra AMC7135 notes below.

My thoughts: This driver seems quite expensive just to get a fiddly way of changing modes. Maybe it'll serve someone well, but with only 4 modes, changing modes normally with a reverse clicky would require just as many button pushes on average and require less thinking. Changing to firefly mode when the battery voltage drops to 3.3 V is unnecessarily conservative - from the last Li-ion cells I tested it would be at just under half their capacity.

Last updated 18 Jan 2016.

3*AMC7135
(GCOOL, ramping)

p-560

Intl Outdoor Store

$6.95
(sold out and/or discontinued)

Linear regulator

2.9-4.5 V
(for possibly 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
66-97%

1050 mA

2 17 mm Driver removed from site.

Linear regulator using three AMC7135 chips and a micro controller for PWM mode control. 2 modes with memory; ramping mode (user settable 1-100%), strobe. PWM frequency 3.7 kHz. Low voltage protection; at 3.3V the current drops to 8mA and turns off when it gets to ~2.9 V - unclear if this is a designed feature or just the way the AMC7135 works. Comes with spring on positive terminal.

Last updated 18 Jan 2016.

3-mode Double Protection Torch Circuit Driver V9

CNQ001481

CN Quality Goods

$12.00 + shipping

Step-down (non-buck) driver

5.5-15 V 1    

3000 mA

1 21 mm x 12 mm high - two boards in double layer Top board diameter 19 mm. PWM frequency 700 Hz. Thermal protection. Low voltage protection (I think that's what "run multhium battery protection" means).

Last updated 17 Mar 2015.

3.6-9 V, 800 mA Regulated IC Circuit Board

the 40

Shining Beam

$5.25 for 2 + shipping

Buck driver

3.6-9.0 V 1    

800 mA

1 16 mm Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.

SKU 1060. Buck driver. Unknown driver chip.

Last updated 10 Jun 2011.

30W Boost/Buck

S020077

KaiDomain

$14.99

Boost driver and buck driver

3.0-18 V 1-4 2-4x Li-ion  

2800 mA

5 26 mm x 17mm high - two boards in double layer Output current varies from claimed 5 A for 1 LED (which disagrees with the claimed 8-10 W) to 3 A for 3-4 LEDs. However, 2.8 A is also claimed by sales staff answering two separate thread questions - buyer beware. 5 modes with memory; high, medium, low (no mention of ratios/duty cycle), strobe, SOS. Low voltage protection at 5.7 V, thermal protection (heatsinking possibly required).

Last updated 17 Mar 2015.

30W Boost/Buck

S020121

KaiDomain

$14.99

Boost driver and buck driver

3.0-18 V 1-4 2-4x Li-ion  

2800 mA

3 26 mm x 17mm high - two boards in double layer Output current varies from claimed 5 A for 1 LED (which disagrees with the claimed 8-10 W) to 3 A for 3-4 LEDs. However, 2.8 A is also claimed by sales staff answering a thread question - buyer beware. 3 modes with memory; low, medium, high (no mention of ratios/duty cycle). Low voltage protection at 5.7 V, thermal protection (heatsinking possibly required).

Last updated 23 Jun 2015.

30W mains driver

399163

DealExtreme

$7.35

Buck driver

86-265 V 10-12 115 V, 230 V AC mains power  

900 mA

1 95 mm x 39 mm x 24 mm Output voltage 30-36 V.

Last updated 6 Feb 2016.

330mA MR16 driver

1110704

FastTech

$1.48

MR16 (buck) driver

12-17 V DC; also works with AC 1-3 12 V AC or DC 91-92%

330 mA

Can be modified to 1000 mA

1 18 mm x 14 mm x 10 mm Uses CL6807 driver chip (see notes on CL6807 below). Efficiency figures driving 2-3 LEDs with rectifier diodes bypassed.

Last updated 22 Mar 2015.

330mA MR16 driver for red/yellow LEDs

1117500

FastTech

$2.65

MR16 (buck) driver

12-12 V DC; also works with AC 1 12 V AC or DC  

330 mA

1 13 mm x 13 mm x 12 mm Output current is assumed. Said to be for red and yellow LEDs; no mention of output voltage.

Last updated 17 Mar 2015.

3A buck driver

1143104

FastTech

$7.97

Buck driver

5.5-15 V 1 2-3x Li-ion  

3000 mA

5 21 mm x 10 mm high - two boards in double layer 5 modes with memory; low (10%), medium (50%), high (100%), strobe, SOS. Disappointingly slow PWM frequency, 122 Hz. Low voltage warning and protection.

Last updated 17 Mar 2015.

3A Circuit Driver for Bike Light

S020082

KaiDomain

$12.99

Buck driver

6.0-15 V 1    

3000 mA

1 26 mm x 14mm high - two boards in double layer Thermal protection.

Last updated 17 Mar 2015.

3A, 3 mode driver

S010116

KaiDomain

$25.66 for 5

Buck driver

8.4-12 V 1    

3000 mA

1   Said to be suitable for Cree XM-L. Probably the same as DX sku.57779.

Formerly product ID 11384.

Last updated 28 Oct 2012.

3A, 3 mode driver

57779

DealExtreme

$5.79
(up from $5.00)
(sold out and/or discontinued)

Buck driver

6.0-18 V 1-3   71-91%

2800 mA
constant current

3 22 mm x 14 mm high - two boards in double layer 3 modes; high, low, fast strobe. Regulation appears to be reasonably good. Modification for single mode and test results for 1 to 3 LEDs are on CPF here. An alternative is DX sku.128269 or Lights Castle 530016.

Last updated 3 Feb 2017.

3A, 3 mode LED driver

AC011011

ledsupermall.com

$6.60
(down from $7.60)

Buck driver

5.5-15 V 1   90-95%

3000 mA

3 19 mm x 8 mm high 3 modes; low (10%), high, medium (35%). Recommended use with maximum 12 V input.

Last updated 17 Mar 2015.

3A, 3 mode LED driver

AC011021

ledsupermall.com

$5.10

Buck driver

8.4-12 V 1    

3000 mA

3 22 mm x 14 mm high - two boards in double layer Incomplete specs - buyer beware. Possibly the same as DX sku.57779 (which is cheaper). Size listed here assumes that.

Last updated 17 Mar 2015.

3A, 5 mode (V10+ brand)

1250100

FastTech

$5.99

Linear regulator

2.7-4.5 V 1 1x Li-ion  

3000 mA

5 17 mm x 10 mm high - two boards in double layer 5 modes with memory; high, medium, low, strobe, SOS. Alternate group with no flashing modes accessed by half press.

Last updated 17 Mar 2015.

3A, 8 mode incl ramping (V10+ brand)

1278600

FastTech

$6.19

Linear regulator

2.7-4.5 V 1 1x Li-ion  

3000 mA

8 17 mm x 10 mm high - two boards in double layer 8 modes in 4 groups, with memory; medium (30%), beacon strobe (10 Hz twice, 2-second pause), fast strobe (7 Hz), SOS. Alternate groups with no flashing modes accessed by half press.

Last updated 17 Mar 2015.

3W driver

1675107

FastTech

$3.98

Buck driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

700 mA

1 20 mm Output voltage 3.2-3.8 V. Note: This driver has the same specs as FT sku.1677800, just no photos.

Includes a Cree XR-E (Q3 bin) cool white LED.

Last updated 17 Mar 2015.

3W lighting driver

1110713

FastTech

$1.52

MR16 (buck) driver

12-17 V DC; also works with AC 1-3 12 V AC or DC  

610 mA

Can be modified to 1000 mA

1 17 mm Uses PT4115 driver chip (see notes on PT4115 below) with SS14 Schottky diodes and a 220µF capacitor.

Last updated 31 Mar 2015.

3x 1 W LED driver B350B12D1-3

445

Best Hong Kong

$6.95 + shipping

Buck driver

12-12 V 3    

350 mA
constant current

1 23 mm x 19 mm x 14 mm Output voltage range is so tight it can't be used to drive three red or amber LEDs.

Last updated 10 Jun 2011.

3x 3 W LED driver B700B12D3-3

447

Best Hong Kong

$7.95 + shipping

Buck driver

12-12 V 3    

700 mA
constant current

1 23 mm x 19 mm x 14 mm Output voltage range is so tight it can't be used to drive three red or amber LEDs.

Last updated 10 Jun 2011.

3x AMC7135

1127406

FastTech

$1.70

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1050 mA
constant current

1 17 mm Linear regulator using 3x AMC7135 chips. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

3x AMC7135

530006

Lights Castle

$2.38

Linear regulator

2.7-6.0 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1050 mA
constant current

1 15 mm Linear regulator using 3x AMC7135 chip. See extra AMC7135 notes below. Apparently has a capacitor instead of a diode, so no polarity protection.

Last updated 6 Feb 2016.

3x AMC7135 (Nanjg AK-47A)

127689

DealExtreme

$3.71
(down from $3.80)

Linear regulator

3.0-4.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm Linear regulator using three AMC7135 chips and a ATtiny13V for PWM mode control. 5 modes with memory, with solder pads allowing different mode groups to be selected; low (5%), medium (30%), high, fast strobe, SOS. This is more expensive than the apparently identical DX sku.6190. A slightly cheaper version without memory is DX sku.127686. See extra AMC7135 notes below or this CPF thread.

Last updated 22 Sep 2015.

3x AMC7135 (TR-0026)

25518

DealExtreme

$2.36

Linear regulator

2.7-6.0 V
(no polarity protection diode - see notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA
constant current

1 15 mm Buyer beware - DX has changed this driver several times. Linear regulator, apparently a three two? AMC7135 board but identification marks on the chips have been removed for the photo. What would normally be a standard polarity protection diode actually looks like a capacitor between battery positive and battery negative. See extra AMC7135 notes below.

Originally claimed to provide different current outputs (0.7-1 A) to different Cree efficacy bins. I think NOT.

Last updated 7 Nov 2013.

3x AMC7135, "random brightness"

ECS001092

CN Quality Goods

$7.50 + shipping

Linear regulator

3.0-6.0 V 1 1x Li-ion
3x NiMH
 

1050 mA

3 17 mm The description for how this thing works is a big fat lost-in-translation mystery. Possibly 3 modes; programmed brightness, strobe, random mode (can be set to any brightness 0-100%). There's also a "tactical mode" mentioned which involves a half press... of what? Two-stage low voltage protection; with poor quality Li-ion cells the first stage (output drops to 8 mA) will cut in at less than 2/3 the battery capacity. Polarity protection. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

3x AMC7135, 16 mode
(Nanjg 101-AK)

S003214

KaiDomain

$4.08
(up from $3.99)

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

16 17 mm Uses three AMC7135 linear regulator chips and possibly an ATtiny13V for PWM modes; 16 modes in 3 groups, including one with no flashing modes. Claimed in different places to be both 16 and 17 modes. Space on the board for a 4th AMC7135. Appears to be exactly the same as KD S009743, which is cheaper. See extra AMC7135 notes below.

Formerly product ID 1677.

Last updated 20 Nov 2012.

3x AMC7135, 16 or 17 mode
(Nanjg 101-AK)

S009743

KaiDomain

$3.27 each
(up from $3.20),
also available in 5 pack

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

16 17 mm Uses three AMC7135 linear regulator chips and possibly an ATtiny13V for PWM modes; 16 modes in 3 groups, including one with no flashing modes. Claimed in different places to be both 16 and 17 modes. Space on the board for a 4th AMC7135. Appears to be exactly the same as KD S003214, which is more expensive.

Formerly product ID 10996. Also available in a 5 pack, S009744 (formerly product ID 10997).

Last updated 20 Nov 2012.

3x AMC7135, 19 mode

S003258

KaiDomain

$4.99

Linear regulator

2.7-5.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

19 17 mm Linear regulator using three AMC7135 chips and a PWM mode controller. Claimed 19 modes in 3 groups. Note that the pictures provided are of a standard 3x AMC7135 board with no mode controller - buyer beware - hence unknown polarity protection; input voltages stated here are without that diode, and the typical 5.5 V maximum for a microprocessor mode controller. See extra AMC7135 notes below.

Formerly product ID 1696.

Last updated 20 Nov 2012.

3x AMC7135, 2 mode
(Nanjg AK-47)

S004659

KaiDomain

$3.68 each
(down from $3.98),
also available in 5 pack and 20 pack

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

2 17 mm Linear regulator board using 3 AMC7135 chips and a microcontroller for PWM modes; high, low (15%). Mode memory. Alternate mode groups may be selectable by using the star-shaped contacts, as detailed here. A review is here. See extra AMC7135 notes below.

Formerly product ID 1801. Also available in a 5 pack, S004660 (formerly product ID 1802). Also available in a 20 pack, S006268 (formerly product ID 6052), but with the low mode possibly just 50 mA (a detail which has been lost with KD's last site update).

Last updated 20 Nov 2012.

3x AMC7135, 5 mode

ECS001091

CN Quality Goods

$7.50 + shipping

Linear regulator

3.0-6.0 V 1 1x Li-ion
3x NiMH
 

1050 mA
constant current

4 17 mm 4 modes; low (3-4 mA), medium (200 mA), high, strobe. Two-stage low voltage protection; with poor quality Li-ion cells the first stage (output drops to 2 mA) will cut in at less than 2/3 the battery capacity. Polarity protection. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

3x AMC7135, 5 mode

1124801

FastTech

$1.82

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1050 mA
constant current

5 17 mm Linear regulator using 3x AMC7135 chips. 5 modes; high, medium, low, strobe, SOS. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

3x AMC7135, 5 mode

222869

DealExtreme

$3.70

Linear regulator

3.0-4.5 V 1 3x NiMH,
4x alkaline,
1x Li-ion
 

1050 mA
constant current

5 17 mm Linear regulator using three AMC7135 chips with an MCU for PWM modes and a polarity protection diode. 5 mode; high, medium, low, strobe, SOS.

Last updated 17 Mar 2015.

3x AMC7135, 5 mode
(Nanjg AK-47)

S009484

KaiDomain

$3.50
(up from $3.44)

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm Linear regulator using three AMC7135 chips (formerly listed as having four) and an ATtiny13A for PWM mode control. Five modes - high, medium, low, strobe, SOS. Alternate mode groups can be selectable by using the star-shaped contacts, as detailed here. See extra AMC7135 notes below.

Formerly product ID 9605.

Last updated 20 Nov 2012.

3x AMC7135, 5 mode
(Nanjg AK-47)

p-304

Intl Outdoor Store

$3.35
(up from $2.39)

Linear regulator

3.2-4.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
62-97%

1050 mA
constant current

5 17 mm Linear regulator using three AMC7135 chips and a ATtiny13A for PWM mode control; PWM frequency >4500 Hz. 5 modes with memory; low (5%), medium (30%), high, strobe, SOS. Alternate mode groups can be selected by using the star-shaped contacts; low/high/strobe, low/medium/high, low (10%)/high. Low voltage warning at 2.9-3.0 V. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

3x AMC7135, 5 mode
(Nanjg AK-47A)

1122400

FastTech

$2.70

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1050 mA
constant current

5 17 mm Linear regulator using 3x AMC7135 chips. 5 modes in 4 groups. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

3x AMC7135, 5 mode
(Nanjg AK-47C1)

127686

DealExtreme

$2.83
(down from $3.10)

Linear regulator

3.0-4.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm Update September 2015: These are reported to now have an ascending mode order.

Three AMC7135 chips with a chip to provide PWM modes. 5 modes without memory, with solder pads allowing different mode groups to be selected; high, medium (30%), low (5%), strobe, SOS. (Note the descending order.) There is a 2 mode group of high and low (10%). Polarity protected. Alternative is DX sku.127689 (ascending mode order with memory). See extra AMC7135 notes below or this CPF thread.

Last updated 23 Sep 2015.

3x AMC7135, 5 mode
(Nanjg AK-47C20)

p-596

Intl Outdoor Store

$2.83
For 1-2: + shipping
(sold out and/or discontinued)

Linear regulator

2.9-4.5 V 1 3x NiMH
1x Li-ion
 

1050 mA
constant current

5 20 mm Driver removed from site.

Linear regulator using three AMC7135 chips and a ATtiny13A or similar providing PWM modes; PWM frequency >4.5 kHz. 5 modes with "several hour" memory, with solder pads allowing different mode groups to be selected; low (5%), medium (30%), high, strobe, SOS. Alternate mode groups can be selected by using the star-shaped contacts; low/high/strobe, low/medium/high, low (10%)/high. Low voltage protection at 2.8 V. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

3x AMC7135, LED-120219

3647201

FastTech

$1.40

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
3-4x alkaline
50-97%

1050 mA
constant current

1 17 mm Linear regulator using 3x AMC7135 chips. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

3x AMC7135, LEDROAD LED-150603

3647302

FastTech

$1.56

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
3-4x alkaline
50-97%

1050 mA
constant current

1 20 mm Linear regulator using 3x AMC7135 chips. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

3x AMC7135
(Nanjg 10)

58

PCB Components

$10.30 (approx)
€5.45 (actual) + shipping

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA
constant current

1 17 mm Linear regulator using three AMC7135 chips (thus the pictured driver is not this one). Note that the claimed input voltage doesn't allow for the polarity protection diode; the correct figures are listed in this table. See extra AMC7135 notes below.

Last updated 22 Oct 2012.

3x AMC7135
(Nanjg 111)

127687

DealExtreme

$2.90

Linear regulator

3.0-6.3 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA

1 17 mm Linear regulator with three AMC7135 chips. Polarity protection assumed to be using a Schottky diode (providing 0.3 V drop).

Last updated 17 Mar 2015.

3x AMC7135
(TR0026)

LFD68G

Focalprice

$1.49
(down from $2.26,
up from $1.48)

Linear regulator

2.7-6.0 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA
constant current

1 15 mm Linear regulator using three AMC7135 chips. No polarity protection.

Last updated 17 Mar 2015.

3x1W MR16 driver

1110710

FastTech

$1.49

MR16 (buck) driver

12-17 V DC; also works with AC 1-3 12 V AC or DC  

330 mA
constant current

Can be modified to 1000 mA

1 15 mm x 15 mm x 10 mm Uses CL6807 driver chip (1A max, 0.1V sense voltage, dimming pin).

Last updated 22 Mar 2015.

3x1W MR16 driver

204052

DealExtreme

$1.50
(in the More Options link;
list price $2.21,
up from $2.00)
(sold out and/or discontinued)

MR16 (buck) driver

8.0-12 V DC; also works with AC 3 12 V AC or DC 75%

300 mA
constant current

1 27 mm x 17 mm x 9 mm Output voltage not stated, probably 8-11 V. Removed from website.

Last updated 18 May 2015.

3x AMC7135, 17 mode (formerly 16 mode)
(Nanjg 101-AK)

7612

DealExtreme

$3.60

Linear regulator

3.0-5.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

17 17 mm Update Nov 2012: Two different versions of this driver are being shipped, a 101-AK-A1 and an AK-47A with the four star contacts like DX sku.127689. The functionality might be unchanged.

Linear regulator using three AMC7135 chips and a PWM mode controller (ATtiny13V running the PWM at 4.7 kHz); includes a group with three well-spaced modes and no flash or strobe! Now with 17 modes. I got slightly different timing on the third group though, and call them different things - low (10%), medium (35%), high (100%), fast strobe, police strobe, beacon (1 flash per 3.5 sec), fast beacon (1 flash per 1.4 sec), slow beacon (1 flash per 11 sec), SOS (1 set per 11 sec). The latest boards have an empty space all ready for a 4th AMC7135. They may also have low battery detection - see here. See extra AMC7135 notes below.

Tip 3: Methods for wiring this board in parallel with another AMC7135 board are described here, with lots of colourful diagrams.

Tip 4: Modes can be disabled by following the instructions in this thread.

Last updated 20 Nov 2012.

3x AMC7135, 19 mode (Nanjg 15)

417

e-lectronics.net

$4.50 + shipping

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA
constant current

19 17 mm Formerly 2 mode. Linear regulator board using three AMC7315 chips and probably a PIC12F629 for PWM mode control. Has a group with high/medium/low without flash or strobe. Low mode 120 mA. Note that the claimed input voltage doesn't allow for the polarity protection diode, which is confirmed by the mention that it operates best over 3.5 V; the more likely correct figures are listed in this Driver List table. See extra AMC7135 notes below.

Last updated 22 Oct 2012.

3x AMC7135, 20 mode (LDCH)

7879

DealExtreme

$3.95
(sold out and/or discontinued)

Linear regulator

3.0-5.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

20 17 mm Linear regulator using three AMC7135 chips and a PWM mode controller. See extra AMC7135 notes below.

Last updated 20 Nov 2012.

3x AMC7135, 3 mode
(Nanjg AK-47)

S003256

KaiDomain

$3.75
(up from $3.69,
down from $4.99)

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

3 17 mm Uses three AMC7135 linear regulator chips and ATtiny13V for PWM modes - low, medium, high according to gunga, not the other way around. Is not 1.2 A output as claimed, but you might get 1.1 A. Changing the mode group may also be possible using the contacts on the bottom of the driver board. See extra AMC7135 notes below.

Formerly product ID 1694 and 8020.

Last updated 20 Nov 2012.

3x AMC7135, 5 mode
(Nanjg AK-47)

6190

DealExtreme

$3.62
(up from $3.19)
(backordered)

Linear regulator

3.0-4.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm (maybe 15 mm - see tip 3) Linear regulator using three AMC7135 chips and a ATtiny13V for PWM mode control. 5 modes with memory; the claimed high, medium (35%), low (20%), strobe, SOS is actually low (5%), medium (30%), high, strobe, SOS according to brted's review and harlxw's test results (in the same thread), which means it appears to be the same as DX sku.127689 except cheaper. A version without memory is DX sku.127686. Alternate mode groups can be selected by using the star-shaped contacts, as detailed here. Unknown why maximum voltage is specified at only 4.5 V instead of 5.5 V for the ATtiny13V (5.8 V with a Schottky polarity protection diode). See extra AMC7135 notes below or this CPF thread.

Tip 3: One user reports he was able to sand it down to 15 mm diameter.

Last updated 22 Sep 2015.

3x AMC7135
(Nanjg 10)

1885

DealExtreme

$16.58 for 10, also available in 20 pack
(sold out and/or discontinued)

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1050 mA
constant current

1 17 mm Linear regulator with three AMC7135 linear regulator chips and a silicon polarity protection diode (0.6 V drop on the chip enable pin). This board comes with one AMC7135 connected and the other two just needing small solder bridges - very useful for using a switch instead of the solder bridges to change from 1/3 amp to 2/3 amp or 1 amp. The solder bridges are the yellow dots in this picture by PaulH (see CPF thread). Also (formerly) available as a 20 pack. See extra AMC7135 notes below.

Last updated 5 Mar 2014.

4A linear regulator

p-546

Intl Outdoor Store

$6.21
(sold out and/or discontinued)

Linear regulator

2.7-4.5 V 1 1x Li-ion  

4000 mA

3 17 mm x 15 mm high - two boards in double layer Driver removed from site.

Three modes; high, medium (30%), low (5%). Thermal protection, low voltage warning.

Last updated 18 Jan 2016.

4A, 5 mode (V10+ brand)

1303001

FastTech

$5.42

Linear regulator

2.7-4.5 V 1 1x Li-ion  

4000 mA

5 17 mm x 10 mm high - two boards in double layer 5 modes with memory; high, medium, low, strobe, SOS. Alternate group with no flashing modes accessed by half press.

Last updated 17 Mar 2015.

4A, 8 mode incl ramping (V10+ brand)

1303000

FastTech

$5.42

Linear regulator

2.7-4.5 V 1 1x Li-ion  

4000 mA

8 17 mm x 10 mm high - two boards in double layer 8 modes in 4 groups, with memory; medium (30%), beacon strobe (10 Hz twice, 2-second pause), fast strobe (7 Hz), SOS. Alternate groups with no flashing modes accessed by half press.

Last updated 17 Mar 2015.

4x AMC7135

1127404

FastTech

$1.92

Linear regulator

3.0-6.3 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1400 mA
constant current

1 17 mm Linear regulator using 4x AMC7135 chips. Polarity protected (assumed to be Schottky diode). See extra AMC7135 notes below.

Last updated 17 Mar 2015.

4x AMC7135 V2, 7 mode

S020075

KaiDomain

$4.49 each
also available in 5 pack

Linear regulator

2.7-4.5 V 1 1x Li-ion,
3x NiMH
50-97%

1520 mA
constant current

7 17 mm Claimed 380 mA per each of 4 AMC7135 linear regulator chips. 7 modes in 8 groups determined by binary combinations of 3 solder bridges; ultra-low (3-5 mA) [why?], medium (35%), high, strobe (10 Hz), slow strobe (2 Hz), SOS, beacon. Mode memory determined by another solder bridge. Low voltage warning at 2.8 V, claimed minimum 2.5 V; the AMC7135 datasheet says 2.7V minimum. No short circuit protection, no reverse polarity protection.

Also available as a 5 pack, S020076.

Last updated 17 Mar 2015.

4x AMC7135, 1 mode
(Nanjg 111)

530027

Lights Castle

$4.64

Linear regulator

3.0-6.3 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1400 mA
constant current

1 17 mm Linear regulator using 4x AMC7135 chip. Polarity protected (assumed to be a Schottky diode). See extra AMC7135 notes below.

Last updated 6 Feb 2016.

4x AMC7135, 3 mode (Nanjg 101-AK)

the 133

Shining Beam

$5.95 + shipping

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1400 mA
constant current

3 17 mm Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.

SKU 1218. Buyer beware - the claim to be a "buck circuit board" (formerly claimed to be boost/buck driver) is clearly false, since it has four AMC4135 linear regulators plus an ATtiny13A PWM controller giving three modes - claimed low (60 mA), medium (440 mA), high (1.4 A); formerly claimed low (120 mA), medium (350 mA), high (1.4 A); tested low (60-80 mA), medium (440-450 mA), high (1420 mA). May be able to be converted to 5 modes by removing a solder bridge. See extra AMC7135 notes below.

The URL of this driver used to be what was claimed to be a 5 mode buck/boost driver. This 3 mode driver is double listed on their site.

Last updated 16 Mar 2012.

4x AMC7135, 5 mode
(Nanjg 101-AK-A1)

S009959

KaiDomain

$13.99 for 5
(up from $13.71)

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1400 mA
constant current

5 17 mm Incomplete specifications given. The "1560mAh" in the title and "1560mAh current" under the heading "Hightlight" are meaningless, other than being typical of the site. Linear regulator using four AMC7135 chips and a ATtiny13A for PWM mode control. See extra AMC7135 notes below. Default is 5 modes - low (2%), medium (28%), high (100%), strobe, SOS. Can also be set to 3 modes (low, medium, high) using a solder bridge.

Formerly product ID 11218.

Last updated 20 Nov 2012.

4x AMC7135, 5 mode
(Nanjg 101-AK-A1)

p-254

Intl Outdoor Store

$3.50
(up from $2.89)

Linear regulator

2.7-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1400 mA
constant current

5 17 mm Linear regulator using four AMC7135 chips and a ATtiny13A for PWM mode control at >4.5 kHz. Five modes with memory; low (5%), medium (30%), high, strobe, SOS. Flashing modes can be eliminated with a solder bridge. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

4x AMC7135, 5 mode
(Nanjg 101-AK-A1)

1122401

FastTech

$2.89

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1400 mA
constant current

5 17 mm Linear regulator using 4x AMC7135 chips. 5 mode; high, medium, low, strobe, SOS. Can be converted to 3 mode with a solder bridge. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

4x AMC7135, LEDROAD LED-150603

3647303

FastTech

$1.77

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1400 mA
constant current

1 20 mm Linear regulator using 4x AMC7135 chips. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

4x AMC7135,
(Nanjg 111)

1424902

FastTech

$26.87 for 20

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1400 mA
constant current

1 17 mm Linear regulator using 4x AMC7135 chips. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

4x AMC7135
(Nanjg 10)

48

PCB Components

$8.50 (approx)
€5.95 (actual) + shipping

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1400 mA
constant current

1 17 mm Linear regulator using four AMC7135 chips (thus the pictured driver is this one). Note that the claimed input voltage doesn't allow for the polarity protection diode; the correct figures are listed in this table. See extra AMC7135 notes below.

Last updated 2 Jul 2012.

4x AMC7135
(Nanjg 101-AK-A1)

127688

DealExtreme

$3.90
(down from $4.40)
(sold out and/or discontinued)

Linear regulator

3.0-4.5 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH
1x Li-ion
50-97%

1400 mA
constant current

5 17 mm Linear regulator using four AMC7135 chips with an MCU for PWM modes and a polarity protection diode. 5 modes with mode memory; low (5%), medium (30%), high, fast strobe, SOS. Polarity protection assumed to be using a Schottky diode (providing 0.3 V drop).

Last updated 1 Nov 2017.

4x AMC7135
(Nanjg 111)

127685

DealExtreme

$2.87
(down from $3.25)
(up from $3.00)
(sold out and/or discontinued)

Linear regulator

3.0-6.3 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1400 mA
constant current

1 17 mm Four AMC7135 chips with a polarity protection diode. The 3.0-4.5 V range mentioned by DX is unnecessarily restrictive but fits with a single Li-ion cell plus 0.3 V for a Schottky diode providing the polarity protection.

Last updated 1 Nov 2017.

4x1W MR16 driver

178343

DealExtreme

$4.42 for 5
(down from $4.80)

MR16 (buck) driver

12-12 V DC; also works with AC 4 12 V AC or DC  

310 mA

1 28 mm x 17 mm x 9 mm Unknown operation method; presumed to be buck driver. Claimed output voltage 12-18 V, which would be impossible to do even with 12 V AC with just buck, implies buck/boost; this is almost certainly not the case. Driver comes with a bridge rectifier so it can be used with AC. Appears to be the same as DX 66271.

Last updated 17 Mar 2015.

4x1W MR16 driver

180543

DealExtreme

$4.40 for 5
(down from $4.80)

MR16 (buck) driver

8.0-15 V DC; also works with AC 1-4    

310 mA

1 27 mm x 18 mm x 10 mm Output voltage 3-15 V.

Last updated 17 Mar 2015.

4xAMC7135, 1 mode

355285

DealExtreme

$3.27
(down from $3.53)
(sold out and/or discontinued)

Linear regulator

3.6-4.5 V 1 1x Li-ion 50-97%

1400 mA
constant current

1 17 mm Single mode.

Last updated 1 Nov 2017.

4xAMC7135, 3 mode

355282

DealExtreme

$3.72
(down from $3.99)
(sold out and/or discontinued)

Linear regulator

3.6-4.2 V 1 1x Li-ion 50-97%

1400 mA
constant current

3 17 mm 3 mode; high, low, fast strobe. Polarity protection.

Last updated 1 Nov 2017.

4xAMC7135, RNX-R5 5 mode

355973

DealExtreme

$4.18
(down from $4.59)
(sold out and/or discontinued)

Linear regulator

3.0-4.5 V 1 1x Li-ion 50-97%

1200 mA
constant current

5 17 mm 5 modes with memory; high, medium, low, fast strobe, SOS. Low voltage protection. Has 4xAMC7135 (1.4 A) but originally claimed the output of 6xAMC7135 (2.1 A), now claims only 1.2 A - buyer beware. Big spring (relatively speaking) on back of board.

Last updated 1 Nov 2017.

4x AMC7135 (Nanjg 111)

3178

DealExtreme

$31.60 for 20
(down from $33.94)
(sold out and/or discontinued)

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 3x NiMH,
4x alkaline,
1x Li-ion
50-97%

1400 mA
constant current

1 17 mm Linear regulator using four AMC7135 chips. See extra AMC7135 notes below.

Formerly also available as a 15 pack (which for some reason changed from a 10 pack).

Last updated 1 Nov 2017.

5 W driver

S009736

KaiDomain

$2.65
(up from $2.60)

Buck driver

3.0-18 V 1    

1000 mA

1 17 mm Incomplete and non-sensical specifications given - output current a guess. The specs that are provided are the same as DX sku.26110.

Formerly product ID 10989.

Last updated 28 Oct 2012.

5A Circuit Driver for Bike Light

S020081

KaiDomain

$13.39

Buck driver

6.0-15 V 1    

5000 mA

1 26 mm x 14mm high - two boards in double layer Thermal protection.

Last updated 17 Mar 2015.

5A linear regulator

p-547

Intl Outdoor Store

$6.47
(sold out and/or discontinued)

Linear regulator

2.7-4.5 V 1 1x Li-ion  

5000 mA

1 17 mm x 15 mm high - two boards in double layer Driver removed from site.

Three modes; high, medium (30%), low (5%). Thermal protection, low voltage warning.

Last updated 18 Jan 2016.

5A, 5 mode (V10+ brand)

1250101

FastTech

$6.40

Linear regulator

2.7-4.5 V 1 1x Li-ion  

5000 mA

5 17 mm x 10 mm high - two boards in double layer 5 modes with memory; high, medium, low, strobe, SOS. Alternate group with no flashing modes accessed by half press.

Last updated 17 Mar 2015.

5A, 8 mode incl ramping (V10+ brand)

1278501

FastTech

$6.40

Linear regulator

2.7-4.5 V 1 1x Li-ion  

5000 mA

8 17 mm x 10 mm high - two boards in double layer 8 modes in 4 groups, with memory; medium (30%), beacon strobe (10 Hz twice, 2-second pause), fast strobe (7 Hz), SOS. Alternate groups with no flashing modes accessed by half press.

Actual output current tested at 4450 mA at input voltage 4.2 V (this may have been limited by resistance of test probes - see discussion thread).

Last updated 17 Mar 2015.

5x AMC7135, 5 mode
(Nanjg 105C)

1122300

FastTech

$3.18

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1750 mA
constant current

5 17 mm Linear regulator using 5x AMC7135 chips. 5 modes in 4 groups; low (5%), medium (30%), high (100%), strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

5x AMC7135, LEDROAD LED-153603

3647300

FastTech

$1.97

Linear regulator

3.0-4.2 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

1750 mA
constant current

1 20 mm Linear regulator using 5x AMC7135 chips. Polarity protected, low voltage protection. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

6-18V, 3A, 3 mode driver

530016

Lights Castle

$6.73

Buck driver

6.0-18 V 1-3 2-4x Li-ion  

3000 mA

3 22 mm x 14 mm high 3 mode; high, low, fast strobe. Possibly the same as DX 128269.

Last updated 6 Feb 2016.

650mA MR16 driver

1110707

FastTech

$2.65

MR16 (buck) driver

12-12 V DC; also works with AC 1 12 V AC or DC  

650 mA

1 18 mm x 14 mm x 13 mm Output current is assumed - buyer beware.

Last updated 17 Mar 2015.

6x AMC7135 V2, 7 mode

S020064

KaiDomain

$4.59 each
also available in 5 pack

Linear regulator

2.7-4.5 V 1 1x Li-ion,
3x NiMH
50-97%

2280 mA
constant current

7 17 mm Claimed 380 mA per each of 6 AMC7135 linear regulator chips. 7 modes in 8 groups determined by binary combinations of 3 solder bridges; low (3-5 mA), medium (35%), high, strobe (10 Hz), slow strobe (2 Hz), SOS, beacon. Mode memory determined by another solder bridge. Low voltage warning at 2.8 V, claimed minimum 2.5 V; the AMC7135 datasheet says 2.7V minimum. No short circuit protection, no reverse polarity protection.

Also available as a 5 pack, S020065.

Last updated 17 Mar 2015.

6x AMC7135 V2,
7 mode, low mode 50mA

S020998

KaiDomain

$18.99 for 5

Linear regulator

2.5-4.5 V 1 1x Li-ion  

2280 mA

7 17 mm Note that the low end of the claimed input voltage range will not produce the desired output current. Low mode 50mA (for 3-5 mA see KD S020064). Last mode memory with solder bridge. Low voltage warning at 2.8 V.

Last updated 17 Mar 2015.

6x AMC7135, 5 mode
(Nanjg 105C)

p-536

Intl Outdoor Store

$4.09

Linear regulator

3.2-4.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion 50-97%

2100 mA
constant current

5 17 mm Linear regulator using six AMC7135 chips and a ATtiny13A providing PWM modes; PWM frequency >4500 Hz. 5 modes with memory; low (5%), medium (30%), high, strobe, SOS. Alternate mode groups can be selected by using the star-shaped contacts; low/high/strobe, low/medium/high, low (10%)/high. Low voltage warning at 2.9-3.0 V. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

6x AMC7135, 5 mode
(Nanjg 105C)

1186300

FastTech

$2.71

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2100 mA
constant current

5 17 mm Linear regulator using 6x AMC7135 chips. 5 modes; low (5%), medium (50%), high (100%), strobe, SOS. Alternate group reached with half press of power button; low, medium, high. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

6x AMC7135, 5 mode
(Nanjg 105C)

1122301

FastTech

$3.37

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2100 mA
constant current

5 17 mm Linear regulator using 6x AMC7135 chips. 5 modes in 4 groups; low (5%), medium (30%), high (100%), strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

6x AMC7135, 5 mode
(Nanjg 105C)

1232400

FastTech

$3.51
(backordered)

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2100 mA
constant current

5 17 mm Linear regulator using 6x AMC7135 chips. 5 modes in 4 groups; low (5%), medium (30%), high (100%), strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

6xAMC7135, 5 mode

355979

DealExtreme

$4.99

Linear regulator

3.0-4.5 V 1 1x Li-ion 50-97%

2100 mA
constant current

5 17 mm 5 modes with memory; high, medium, low, fast strobe, SOS. Low voltage protection. Claimed output 2.2 A but it seems to simply be a normal 6xAMC7135 board.

Last updated 17 Mar 2015.

7x AMC7135, 5 mode
(Nanjg 105C)

1122303

FastTech

$3.56

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2450 mA
constant current

5 17 mm Linear regulator using 7x AMC7135 chips. 5 modes in 4 groups; low (5%), medium (30%), high (100%), strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

800 mA buck driver

S007120

KaiDomain

$10.20 for 4
(up from $10.00)

Buck driver

3.6-9.0 V 1 3-6x NiMH, 1-2x Li-ion  

800 mA

1 17 mm Incomplete specs provided. From the pictures it looks like it's based on the Zetex C310 chip. Size stated in this table is an educated guess. In the 3rd photo, focusing the camera on the wires sticking out the back might be arty but isn't very useful.

Formerly product ID 7330.

Last updated 21 Nov 2011.

800mA buck driver

1114501

FastTech

$1.58

Buck driver

3.2-4.2 V 1 1x Li-ion  

800 mA
constant current

1 17 mm Not a linear regulator as claimed - it has an inductor. The claimed test figures are extremely dodgy; input @ 4.2 V is 1.09 W, output is at least 2.27 W for a white LED - buyer beware. They are also the same figures used for 1114502.

Last updated 17 Mar 2015.

800mA linear regulator

1114502

FastTech

$1.65

Linear regulator

3.2-4.2 V 1 1x Li-ion  

800 mA

5 17 mm 5 modes; high, medium, low, rapid (strobe?), SOS. The claimed test figures are extremely dodgy; input @ 4.2 V is 1.09 W, output is at least 2.27 W for a white LED - buyer beware. They are also the same figures used for 1114501.

Last updated 17 Mar 2015.

825mA lighting driver

1110706

FastTech

$2.13

MR16 (buck) driver

12-12 V DC; also works with AC 1-3 12 V AC or DC  

825 mA

1 21 mm x 17 mm x 13 mm Output current is from the discussion post. If true there is an inconsistency between the input and output current figures - buyer beware.

Last updated 17 Mar 2015.

8x AMC7135

CPF member

$7.99 + shipping

Linear regulator

3.5-4.2 V 1 1x Li-ion  

3000 mA
constant current

12 17 mm with components on both sides Available from CPF member vestureofblood. 12 modes in 4 groups, with and without memory (varies by group); various combinations of ramping, low (2%), medium (25%), high, strobe, SOS, beacon, medium (15%). Low voltage warning. Voltage indication when entering beacon mode.

Last updated 17 Mar 2015.

8x AMC7135 (CPF)

CPF member

$9.36 + shipping

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 4x NiMH 50-97%

2800 mA
constant current

5 17 mm with components on both sides Limited availability from CPF member download. Multimode board with four AMC7135 linear regulators on each side (8 total) and an ATtiny13A for PWM mode control. Mode group selectable by connecting star pads on the board, like an AK-47. 5 modes in default group; low (0.13 A), medium (0.93 A), high (2.8 A), strobe, SOS. See extra AMC7135 notes below.

May have sold a previous 3 mode version like this; high (2.8 A), medium (1 A), low (0.3 A).

Last updated 16 Mar 2012.

8x AMC7135 (homemade)

$6.88 (varies)
Make your own - fun!

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 4x NiMH 50-97%

2800 mA
constant current

1 17 mm Instructions for making your own version. Actual price will vary depending on what boards you use to make it - modes can be included if desired. See extra AMC7135 notes below.

Last updated 23 Oct 2011.

8x AMC7135 high output, Qlite Rev. A (Nanjg 105C)

p-710

Intl Outdoor Store

$4.19

Linear regulator

2.8-4.5 V 1 3-4x NiMH
1x Li-ion
50-97%

3040 mA
constant current

9 17 mm Linear regulator using eight high output AMC7135 chips at 380 mA each. 9 distinct modes in 4 groups, with memory. Claims no high pitch noises and no visible flicker. Polarity protection, low voltage warning and protection. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

8x AMC7135 high output,
6 mode
(Nanjg 105C)

p-667

Intl Outdoor Store

$4.19

Linear regulator

2.9-4.5 V 1 3-4x NiMH
1x Li-ion
50-97%

3040 mA
constant current

6 17 mm Linear regulator using eight AMC7135 chips and a ATtiny13A for PWM mode control; PWM frequency >4500 Hz. 5 modes with memory; low (5%), medium (30%), high, strobe, SOS. Alternate mode groups can be selected by using the star-shaped contacts; low/high/strobe, low/medium/high, low (10%)/high. Low voltage warning at 2.9-3.0 V. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

8x AMC7135 high output,
9 mode
(Nanjg 105C)

p-689

Intl Outdoor Store

$4.19
(sold out and/or discontinued)

Linear regulator

2.8-4.5 V 1 3-4x NiMH
1x Li-ion
50-97%

3040 mA
constant current

9 17 mm Driver removed from site.

Linear regulator using eight high output AMC7135 chips at 380 mA each. 9 distinct modes in 4 groups, with memory. Claims no high pitch noises and no visible flicker. Polarity protection, low voltage protection. See extra AMC7135 notes below. See p-710 for updated version.

Last updated 18 Jan 2016.

8x AMC7135 V2,
7 mode

S020073

KaiDomain

$4.79 each
also available in 5 pack

Linear regulator

2.7-4.5 V 1 1x Li-ion,
3x NiMH
50-97%

3040 mA
constant current

7 17 mm Claimed 380 mA per each of 8 AMC7135 linear regulator chips. Up to 7 modes in each of 8 groups determined by binary combinations of 3 solder bridges; low (aka "firefly", 3-5 mA), medium (35%), high, strobe (10 Hz), slow strobe (2 Hz), SOS, beacon. Mode memory determined by another solder bridge. Low voltage warning at 2.8 V, claimed minimum 2.5 V; the AMC7135 datasheet says 2.7V minimum. No short circuit protection, no reverse polarity protection.

Also available as a 5 pack, S020074.

Last updated 17 Mar 2015.

8x AMC7135 V2,
7 mode, low mode 50mA

S020237

KaiDomain

$21.49 for 5

Linear regulator

2.5-4.5 V 1 1x Li-ion  

3040 mA

1 17 mm Note that the low end of the claimed input voltage range will not produce the desired output current. Low mode 50mA (for 3-5 mA see KD S020073). Last mode memory with solder bridge. Low voltage warning at 2.8 V.

Last updated 17 Mar 2015.

8x AMC7135, 5 mode

CNQ001765

CN Quality Goods

$5.00 + shipping

Linear regulator

3.0-5.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion,
4x NiMH
50-97%

2800 mA
constant current

5 17 mm Linear regulator using eight AMC7135 chips. 5 modes in two groups; low (5%), medium (15%), high, strobe, SOS. Polarity protected. The stated input voltage range is a little high at the top end; 5.5 V for the ATtiny13 and about 0.3V for the polarity protection Schottky diode. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

8x AMC7135, 5 mode

1127403

FastTech

$2.92

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2800 mA
constant current

5 17 mm Linear regulator using 8x AMC7135 chips. 5 modes in 4 groups; high, medium, low, strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

8x AMC7135, 5 mode (Nanjg 105C)

127684

DealExtreme

$4.31
(dorwn from $4.52,
up from $4.20)

Linear regulator

3.0-4.5 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3-4x NiMH
1x Li-ion
50-97%

2800 mA

5 17 mm Linear regulator using eight AMC7135 chips and an ATtiny13A to control PWM modes. 5 modes with memory; low (5%), medium (30%), high, fast strobe, SOS. Selectable mode groups set by solder bridge on the stars. Polarity protection assumed to be using a Schottky diode (providing 0.3 V drop). Low voltage warning.

Last updated 17 Mar 2015.

8x AMC7135, 5 mode
(Nanjg 105C)

1122302

FastTech

$3.76

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2800 mA
constant current

5 17 mm Linear regulator using 8x AMC7135 chips. 5 modes in 4 groups; low (5%), medium (30%), high (100%), strobe, SOS. Alternate groups switched with star contacts. Low voltage warning. Polarity protected. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

8x AMC7135, 5 mode
(Nanjg 105C)

530026

Lights Castle

$5.43

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2800 mA
constant current

5 17 mm Linear regulator using 8x AMC7135 chip. 5 mode; low (5%), medium (30%), high, fast strobe, SOS. Polarity protected. See extra AMC7135 notes below.

Last updated 6 Feb 2016.

8x AMC7135, 5 mode
(Nanjg 105D)

1186301

FastTech

$3.05

Linear regulator

3.0-4.5 V 1 1x Li-ion
3x NiMH
4x alkaline
50-97%

2800 mA

5 17 mm 5 modes in 2 groups with memory; low (5%), medium (50%), high, strobe, SOS. Alternate group with no flashing modes accessed by half press. Low voltage warning.

Last updated 19 Apr 2016.

8x AMC7135,
1 mode
(Nanjg 105C)

S004338

KaiDomain

$4.83
(down from $6.63,
up from $5.70,
down from $5.99)

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion,
4x NiMH
50-97%

2800 mA
constant current

1 17 mm Updated version: This is a Nanjg 105C without the PWM controller board to give modes. Polarity protection. Why the previous price was so much more expensive than the 5 mode version is beyond my guessing ability.

Previous version: This is just two 4x AMC7135 boards connected back to back. See extra AMC7135 notes below.

Warning: Even with the product update the page still contains a full size 6 megapixel image - pretty typical for KD's stupid site.

Formerly product ID 1770.

Last updated 20 Nov 2012.

8x AMC7135,
1 mode
(Nanjg 105C)

AC011012

ledsupermall.com

$4.30
(down from $4.50)

Linear regulator

3.3-6.6 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion,
4x NiMH
50-97%

2800 mA
constant current

1 17 mm Linear regulator using eight AMC7135 chips. Single mode. Apparently a Nanjg 105C board with no mode controller.

Last updated 17 Mar 2015.

8x AMC7135,
3 mode
(Nanjg 106)

the 132

Shining Beam

$6.75 (formerly $6.95) + shipping

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 4x NiMH 50-97%

2800 mA
constant current

3 17 mm with components on both sides Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.

SKU 1217. Multimode board with a PWM mode controller and eight AMC7135 linear regulators (four on each side of the board). 3 modes with memory; low 140 mA, medium 1 A, high 2.8 A (formerly listed as 2.5 A). Claimed input voltage of 2.8-6.0 V doesn't allow for the polarity protection diode; the more likely correct figures are listed in this Driver List table. The output of AMC7135 chips varies a little, so high might be as much as 2.8 A (as mentioned here and here). Also pictured in this post and this post.

Last updated 16 Mar 2012.

8x AMC7135,
5 mode
(apparently Nanjg 105C)

AC011018

ledsupermall.com

$4.80
(down from $5.30)

Linear regulator

3.0-5.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion,
4x NiMH
50-97%

2800 mA
constant current

5 17 mm Linear regulator using eight AMC7135 chips. 5 modes; unstated what they are. Apparently a Nanjg 105C board; if so it has selectable mode groups (by solder bridge on the stars). Low voltage warning - when battery voltage is less than 2.9-3.0 V it changes to low mode and flashes once each second. Polarity protection assumed to be using a Schottky diode (providing 0.3 V drop).

Last updated 17 Mar 2015.

8x AMC7135,
5 mode
(Nanjg 105 or 105A or 105C)

S009742

KaiDomain

$4.79 each
(up from $4.70),
also available in 5 pack
(sold out and/or discontinued)

Linear regulator

3.3-6.1 V
(for 0.6 V lower Vin see Tip 1 in the notes below)
1 1x Li-ion,
4x NiMH
50-97%

2800 mA
constant current

5 17 mm (measured, not stated) March 2012: Driver has been removed from site (as has the 5 pack). See KD sku S020073 for a replacement.

Incomplete specifications given. Uses 8 AMC7135 linear regulator chips with either a PIC12F629 microcontroller for modes, or an ATtiny13A for the 105C model (which is apparently the latest version). Modes are determined by the stars on the board - they provide AK-47 functionality (where a group of modes is hardwired using a solder link). Has the same basic mode groups as CPF user download's very similar driver (diagram here) except their order for the 105A is high (100%), medium (35%), low (4%). When low mode is started there is a momentary bright flash, and after about 2.5 seconds there's a very brief dropout (or "blink") that indicates the mode has been fixed - after that, switching off momentarily will not change the mode. Reviews written for 105 and 105A. As of Jan 2011 the 105C is being shipped.

The maximum voltage in this table is based on the microcontroller's maximum of 5.5 V plus 0.6 V for the polarity protection diode. If it's a Schottky diode the maximum voltage is actually 5.8 V.

Tip: The circuit track for the first star does not need to be broken for the other stars to work.

Formerly product ID 10995. Also available as a 5 pack, S009835 (formerly product ID 11088).

Last updated 15 May 2012.

8x AMC7135,
5 mode
(Nanjg 105C)

p-216

Intl Outdoor Store

$4.19
(down from $4.81)
(sold out and/or discontinued)

Linear regulator

3.0-4.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3-4x NiMH
1x Li-ion
50-97%

2800 mA
constant current

5 17 mm Driver removed from site.

Linear regulator using eight AMC7135 chips and a ATtiny13A for PWM mode control; PWM frequency >4500 Hz. 5 modes with memory; low (5%), medium (30%), high, strobe, SOS. Alternate mode groups can be selected by using the star-shaped contacts; low/high/strobe, low/medium/high, low (10%)/high. Low voltage warning at 2.9-3.0 V. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

8x AMC7135
1 mode
(Nanjg 105C)

p-643

Intl Outdoor Store

$4.15

Linear regulator

3.0-4.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1 3-4x NiMH
1x Li-ion
50-97%

2800 mA
constant current

1 17 mm Linear regulator using eight AMC7135 chips. Polarity protection. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

8xAMC7135, 5 mode

351865

DealExtreme

$4.71

Linear regulator

3.0-4.5 V 1 1x Li-ion 50-97%

2800 mA
constant current

5 17 mm 5 mode; high, medium, low, strobe, SOS. Can change to 2-3 modes using stars on back. The star on the right gives high, medium, and low with no blinking modes.

Last updated 21 Jul 2015.

900mA buck driver

1178002

FastTech

$4.82
(sold out and/or discontinued)

Buck driver

12-14 V 3 12 V automotive  

900 mA

1 43 mm x 24 mm x 8 mm Apparently intended for a 10W (3s3p) LED array.

Last updated 17 Mar 2015.

900mA MR16 driver

1110705

FastTech

$3.62

MR16 (buck) driver

12-12 V DC; also works with AC 1 12 V AC or DC  

900 mA

1 16 mm x 15 mm x 13 mm

Last updated 17 Mar 2015.

9A 3 mode driver

p-561

Intl Outdoor Store

$12.53
(sold out and/or discontinued)

Buck driver

5.5-15 V 1    

9 A
constant current

1 26 mm x 16 mm high - two boards in double layer Driver removed from site.

3 modes; low (10%), medium (30%), high. (The right order and no flashing modes - yay!) 12 V recommended maximum input voltage. Thermal protection and low voltage protection for 2 Li-ion cells.

Last updated 18 Jan 2016.

9A Circuit Driver for Bike Light

S020079

KaiDomain

$13.99

Buck driver

6.0-15 V 1    

9 A

1 26 mm x 14mm high - two boards in double layer Thermal protection.

Last updated 17 Mar 2015.

9W

145771

DealExtreme

$3.78
(up from $3.70)

MR16 (buck) driver

12-24 V DC; also works with AC 3 12 V DC; 12 V AC  

833 mA
constant current

Can be modified to 1000 mA

1 26 mm x 17 mm x 10 mm Buck regulator based on PT4115 chip. Unclear what current rating the diodes have; assumed to be 1 A. Sense resistors 0.2 Ω and 0.3 Ω in parallel. Output voltage 9-11 V. Includes AC rectifier. MR16 prongs not included.

Last updated 17 Mar 2015.

A9 Buck Current Regulated 3.0V~8.4V 1.3A Flashlight PCB

S008846

KaiDomain

$3.55
(down from $3.88)

Buck driver

3.0-8.4 V 1    

1300 mA

1 17 mm Components on both sides of board, no centre battery terminal. There are an awful lot of components on that board for a single mode buck driver. Incomplete/inadequate specifications listed - unknown current regulation, unknown if the driver will step up the voltage if it's too low. The 1.3 A "maximum" implies it's not a constant current driver. Buyer beware.

Formerly product ID 9908.

Last updated 2 Jul 2012.

ACG D series LED drivers

ACG D series

acgelectronics.com

$9.95 + shipping
(sold out and/or discontinued)

Buck driver

9-40 V DC; also works with AC
(8-30 V AC, except 1.4 A version)
1-4   91%

1400 mA
constant current

1 42 mm x 32 mm x 12 mm The URLs linked below have all been reused for various LED products, but the drivers may still be listed on their site elsewhere. Good luck finding them.

Incomplete specifications on manufacturer's and retailer's web sites (incompetent manufacturer?); output voltage/LED quantities unknown. However, by using the wizard on the manufacturer's site it appears they'll do 1-4 LEDs. The claimed maximum 91% efficiency is very good, if true, especially since the drivers (except the 1,400 mA) have a rectifier built in. Even if maximum efficiency is up there however, it's probably not representative of typical efficiency, especially since they all claim the same (except for the 500 mA version which claims 92%) - unlikely across the whole current output range. Soft start. PWM dimming with 0-10 V input or potentiometer. Available in versions with outputs of 350, 500, 700, 1,000 and 1,400 mA.

Last updated 16 Mar 2012.

AMC7135 chip

p-221

Intl Outdoor Store

$0.39
(down from $0.49, down from $0.53)
For 1-4: + shipping
(sold out and/or discontinued)

Linear regulator

2.7-6.0 V 1 3x NiMH
4x alkaline
1x Li-ion
50-97%

350 mA
constant current

1 5 mm x 5 mm x 2 mm Driver removed from site.

Single AMC7135 linear regulator chip; no board. Actual output of any particular chip is in the range 340-380 mA; this one should be close to 350 mA. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

AMC7135 chip x5

CNQ001707

CN Quality Goods

$2.50 for 5 + shipping

Linear regulator

2.7-6.0 V 1 3x NiMH
4x alkaline
1x Li-ion
50-97%

350 mA
constant current

1 5 mm x 5 mm x 2 mm Five single AMC7135 linear regulator chips; no board. Actual output of any particular chip is in the range 340-380 mA. See extra AMC7135 notes below.

Last updated 17 Mar 2015.

AMC7135 chip
380mA

p-666

Intl Outdoor Store

$2.45 for 5
(up from $0.49 each)

Linear regulator

2.7-6.0 V 1 3x NiMH
4x alkaline
1x Li-ion
50-97%

380 mA
constant current

1 5 mm x 5 mm x 2 mm Five AMC7135 linear regulator chips; no board. Actual output of any particular chip is in the range 340-380 mA; these should be close to 380 mA. See extra AMC7135 notes below.

Last updated 18 Jan 2016.

Ampere! 5000 mA

108

PCB Components

$42.00 (approx)
€30.95 (actual) + shipping

Buck driver

7.0-25 V 1-3   97%

5000 mA
constant current

Can be modified to 11 A

1 25 mm x 14 mm high Output voltage up to ~14 V, output power up to ~70 W. Overhead ~1 V. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown. Thermal protection. External PWM input.

Last updated 17 Mar 2015.

Ampere! 9000 mA

108

PCB Components

$42.00 (approx)
€30.95(actual) + shipping

Buck driver

7.0-25 V 1-3   97%

9 A
constant current

Can be modified to 11 A

1 25 mm x 14 mm high Output voltage up to ~14 V, output power up to ~120 W. Overhead ~1 V. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown. Thermal protection. External PWM input.

Last updated 17 Mar 2015.

AMS1117-3.3 linear regulator chip

293568

DealExtreme

$3.99 for 50
(down from $4.16)

Linear regulator

3.0-5.5 V 1 1x Li-ion  

200 mA

1   Output voltage 0.7-3.3 V. SOT-223 surface mount package. From the claimed specs it is apparently not an AMS1117-3.3 (datasheet) which has an output current of 1 A, not the 200 mA claimed.

Last updated 17 Mar 2015.

Assembled Shark Buck with Remora UI

1212

Sandwich Shoppe

$59.00 + shipping

Buck driver

5.0-15 V 1-3   75-77%

3000 mA
constant current

4 19 mm Multimode high current buck driver. Available in two flavours - three mode Plain (low, medium, high) and four mode Special (with SOS). For some strange reason complete specifications are not readily available but some more information is available in this thread, where Wayne says you can drive "maybe 4" LEDs. (I can't see any explanation why the efficiency graph shows values 2% higher than the table.)

Last updated 16 Mar 2012.

AT1000, 1x10W driver

1110812

FastTech

$5.38

Buck driver

12-12 V 3 12 V DC  

1000 mA
constant current

1 65 mm x 26 mm x 24 mm Output voltage 9.0-10.5 V. Intended for 3s3p LED arrays.

Last updated 17 Mar 2015.

AX2002 Multi-level Buck, 3 mode

CPF member

$12.00 (up from $10.40) + shipping
(backordered)

Buck driver

3.6-15 V 1-4   80-90%

1040 mA
constant current

Can be modified to 2000 mA

3 23 mm Limited availability from CPF member download. Uses the popular AX2002 chip; this seems to be the only AX2002 driver available with modes.

Present, designation J: 3 modes; low (50 mA), medium (200 mA), high (1 A). No memory. A few of these have been sold pre-configured to 1.4 A.

Previously, designation H: 3 modes; high (1 A), medium (200 mA), low (30 mA). Has memory. 17 mm diameter. Input voltage 3.6-23 V, 1-6 LEDs.

Claimed 0.25 V headroom (the amount input voltage must be above output voltage); this is probably actually the feedback voltage (the voltage dropped across the current set resistor) - other AX2002 drivers have ~0.5 V headroom. It may be able to be set the output current up to 2 A, the rating for the AX2002.

Last updated 8 Nov 2012.

Badly regulated buck driver

S010147

KaiDomain

$9.13 for 5
(sold out and/or discontinued)

Buck driver

3.0-10.0 V 1    

700 mA

1 16 mm Output current stated to be 700-1000 mA; horrendous regulation!

Formerly product ID 11417.

Last updated 2 Jul 2012.

bFlex v3

bflex

TaskLED

$30.00 + shipping
(sold out and/or discontinued)

Buck driver

4.0-25 V 1-7    

1000 mA
constant current

8 25 mm Buck regulator. Constant current out 350-1000 mA (user reconfigurable) at up to 24 V, uController UI. Thermal and polarity protection included.

Last updated 10 Jun 2011.

Black Power v2

87

PCB Components

$34.00 (approx)
€24.95 (actual) + shipping

Buck driver

7.5-33 V 1-6   92%

2800 mA

1 28 mm 1.5 V overhead. External on/off input. Soft start. Efficiency claimed is maximum; typical efficiency unknown. Thermal protection.

Last updated 22 Dec 2011.

Buck driver (v2)

1105800

FastTech

$6.60 for 4

Buck driver

3.6-16 V 1-4 4+ NiMH,
2+ Li-ion
 

600 mA

1 17 mm Update Feb-Mar 2015: Buyer beware - the drivers shipped are not the drivers pictured (photos have since been updated); the claimed details (taken from the DX site) do not apply. Actually uses a chip marked LEDA 1412 with a SS24 diode and a couple of transistors. The output current is not the 925 mA claimed, but instead varies from 820 mA for one LED to 600 mA for three LEDs in series.

Previously: Appears to be identical to the popular DX sku.3256... and even uses DX's description.

Last updated 17 Mar 2015.

Buck Driver 4-pack (v3)

3256

DealExtreme

$8.21 for 4
(down from $8.64,
down from $9.13,
up from $6.97)
(sold out and/or discontinued)

Buck driver

3.6-16 V 1-4 4+ NiMH,
2+ Li-ion
81-90%

600 mA

Can be modified to 1000 mA

1 17 mm x 6 mm high Update Feb-Mar 2015: Buyer beware - DX has posted new photos which shows the same driver as FT sku.1105800. The claimed details are no longer correct; this driver is sadly no longer recommended. Also, the output current is no longer constant, varying from 820 mA with one LED down to 600 mA with three LEDs in series. This a a very sad change.

Update Nov 2009: New version using AX2002; now constant current output with 0.27 Ω set resistor, slightly larger diameter. Overhead is ~0.52 V. Test data and discussion here.

Tip: The output current can be increased (or decreased) by changing the set resistor appropriately (Rset = 0.25 / current) but the diode is a Schottky SS14, which has a maximum current limit of 1 A. Inexpensive 3 A Schottky diodes are listed here or here (if you want to risk that site).

Old version: 16 mm diameter. The details still on the DX site are for this version. Buck regulator using Zetex C310. 800-1000 mA output dependent on input voltage, although a hack for lower output is explained here. When run at lower output it appears reasonably constant current regulated. Test data graph.

Last updated 17 Nov 2017.

Buck driver with SST-50

2085210

FastTech

$19.55

Buck driver

9-15 V 1

1 LED included

3x Li-ion
12 V DC
 

 

1   Output voltage 3-4 V. Unknown driver size. Unknown driver output current.

Includes 1 SST-50 LED.

Last updated 17 Mar 2015.

BuckPuck

3021...

luxdrive.com

$13.99 to $20.99 + shipping

Buck driver

5.0-32 V DC; also works with AC
(half available models are for DC, half for AC)
1-6   86-95%

1000 mA
constant current

1 20 mm x 20 mm x 11 mm Available in many different forms, each with four versions with outputs of 350, 500, 700 or 1,000 mA. Half the forms are designed for low voltage AC, half for DC. Some forms have a built in trim adjustment for 40-110% output, some allow for an external trim adjustment. External connections vary - some forms have the wires built in, while most have from pins (4-7 of them) for PCB mounting. Wiring harnesses are also available, with and without potentiometer for trim adjustment. An additional capacitor across the input may be needed to smooth input power, as described here.
 
This retailer (3023; wired version) has good prices and a driver selector tool to help sort out all the varieties. Good luck.

Last updated 16 Apr 2012.

BuckToot

7027-D-350

LED Supply

$9.99 + shipping

Buck driver

5.0-28 V 1-6   71-94%

350 mA
constant current

1 19 mm x 10 mm diameter Input voltage must be at least 2 V higher than output voltage. Output has short circuit protection (15 seconds) and open circuit protection. Efficiency is greater the more LEDs it's driving.

Last updated 10 Jun 2011.

BX12V-A010-1110

242098

DealExtreme

$4.90

Buck driver

12-24 V DC; also works with AC 3 12-24 V AC or DC 85%

750 mA

1 63 mm x 24 mm x 10 mm Output voltage 9-12 V. Intended for 3s3p LED arrays. IP67 dust/water rating.

Last updated 17 Mar 2015.

C8 driver module

p-261

Intl Outdoor Store

$15.99
(sold out and/or discontinued)

Linear regulator

3.0-5.8 V
(for 0.3 V lower Vin see Tip 1 in the notes below)
1

1 LED included

1x Li-ion 50-97%

2800 mA
constant current

5 25 mm x 21 mm high Suitable as a driver/pill replacement for a C8 torch. 5 modes, mode group selectable with solder bridge.

Includes a cool white Cree XM-L in a brass pill.

Last updated 18 Jan 2016.

CAM 3 channel

104

PCB Components

$44.00 (approx)
€31.95 (actual)

Buck driver

10-30 V 1-8   93%

1000 mA
constant current

1 57 mm x 31 mm Common Anode Multichannel. Powers 3 LED channels with a common anode, up to a maximum power of 25 W per channel. Output current on each channel can be set at 350 mA, 700 mA, or 1000 mA, and dimmed separately using PWM or DC inputs. Reverse polarity protection. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown.

4 channel version also available.

Last updated 17 Mar 2015.

CAM 4 channel

104

PCB Components

$63.00 (approx)
€45.95 (actual)

Buck driver

10-30 V 1-8   93%

1000 mA
constant current

1 57 mm x 31 mm Common Anode Multichannel. Powers 4 LED channels with a common anode, up to a maximum power of 25 W per channel. Output current on each channel can be set at 350 mA, 700 mA, or 1000 mA, and dimmed separately using PWM or DC inputs. Reverse polarity protection. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown.

3 channel version also available.

Last updated 17 Mar 2015.

CC1W

ccxw

TaskLED

$15.00 + shipping

Buck driver

4.0-30 V 1-4    

350 mA
constant current

1 25 mm x 20.3 mm Buck regulator. Constant current output at up to 16 V. Headroom 1 V.

Last updated 10 Jun 2011.

CC5W

ccxw

TaskLED

$18.00 + shipping
(sold out and/or discontinued)

Buck driver

4.0-30 V 1-4    

1000 mA
constant current

1 25 mm x 20.3 mm Buck regulator. Constant current output 700 mA or 1000 mA, at up to 16 V. Headroom 1.3 V.

Last updated 10 Jun 2011.

CP-MD004 smart breathing controller

946

Sure Electronics

$2.50 + shipping

Step-down (non-buck) driver

4.8-5.2 V 1

1 LED included

5 V internal computer supply  

20 mA

1 45 mm x 27 mm DIP switch to control speed. Output current is estimate only.

Last updated 10 Jun 2011.

Cree MC-E / Seoul P7 driver 5 mode
(101119)

20329

DealExtreme

$5.62 (formerly $5.70)

Buck driver

7.4-8.4 V 1 2x Li-ion 85%

2000 mA

5 25 mm - two boards in double layer Buck regulator using PWM for modes. Double layer board; the 1 mode version plus a mode controller. 5 modes, the order of which multiple users report to be; medium, low, high, strobe, SOS. One user has reported the "strobe" mode is actually a 50% duty cycle flash. No mode memory: "Every switch on, no matter how long or short advances the mode, and if it's left off for more than a minute or two it goes back to full-bright." Claimed constant current output at 2.8A but many buyers have reported the output is not well regulated and/or much lower than the rated output current - around 2.0 A and as low as 1.9 A. Buyer beware!

Last updated 25 Nov 2011.

Cree MC-E / Seoul P7 driver, 1 mode

20330

DealExtreme

$4.70
(sold out and/or discontinued)

Buck driver

4.0-8.4 V 1 6x NiMH,
2x Li-ion
85%

2400 mA

1 25 mm 4th version February 2011: Reported to be equipped with SS34 Schottky diode and provide 2400 mA output. Possibly QX5241A driver chip.

3rd version September 2009: Said by techjunkie to be "a stinker".

2nd version March 2009: Buck regulator, driver chip number obscured/removed. Claimed constant current output at 2.8A but no one has got more than 2260 mA. Techjunkie says it's now well regulated. The Schottky diode used has a current rating of just 2 A.

1st version: Users reported the output current of the older version was not well regulated, and several others reported much lower than the rated output current (as low as 1950 mA was reported). From work techjunkie did here it seemed the driver may have been mainly a voltage regulator not a current regulator. This would allow it to work in parallel but not significantly increase output current. The actual output current would depend on LED Vf, so it's hard to be sure what you'll get. He also said the diameter is actually 26 mm.

Last updated 31 Dec 2012.

Cree MC-E, Seoul P7 driver

S006130

KaiDomain

$10.11 each, also available in 5 pack
(sold out and/or discontinued)

Buck driver

5.5-15 V DC; also works with AC 1    

2800 mA

3 19 mm Three modes at high, medium (30%), low (10%). Its only reviewer says it needs heatsinking or it will burn out. Buyer beware.

Formerly product ID 5595. Also available in a 5 pack, S006371 (formerly product ID 6282).

Last updated 21 Nov 2011.

CX-5117-03D(?)

1950300

FastTech

$4.60 for 5

User interface driver

3.0-4.5 V 1 1x Li-ion  

700 mA

5 17 mm Unknown regulation method. 5 modes; high, medium low, strobe, SOS.

Last updated 17 Mar 2015.

D85, 2.3A driver

CNQ001699

CN Quality Goods

$8.00

Buck driver

3.1-8.4 V 1 1-2x Li-ion  

2300 mA

5 20 mm x 11 mm high 5 mode with memory; high, medium (25%), low (5%), strobe, SOS. Low voltage warning for 1 or 2 Li-ion cells.

Last updated 17 Mar 2015.

D86, 2.4A square driver

CNQ001706

CN Quality Goods

$8.00 + shipping

Buck driver

5.5-16 V 1-3 12V automotive  

2400 mA

3 25 mm x 25 mm x 15 mm 3 modes without memory; high, medium, low.

Last updated 17 Mar 2015.

DL-00193

107676

DealExtreme

$3.70
(backordered)

Buck driver

3.0-9.0 V 1 2x Li-ion  

1000 mA

5 17 mm x 7 mm high - two boards in double layer 5 modes; high, medium (50%), low (10%), strobe (8 Hz), SOS.

Last updated 11 Apr 2015.

DL-004

106303

DealExtreme

$4.90
(up from $3.99 clearance price, down from $4.90)

Buck driver

5.0-8.4 V 1 2x Li-ion  

2500 mA

4 26 mm x 13 mm high For a while (around May 2012) this driver was at a clearance price. The driver is back up to its normal price and is still available.

4 modes; high, medium (50%), low (25%), SOS.

Last updated 17 Mar 2015.

DL-005

106805

DealExtreme

$4.00
(sold out and/or discontinued)

Buck driver

5.0-17 V 1 2-4x Li-ion  

2000 mA

1 20 mm x 12mm high - two boards in double layer 5 modes, no memory; high, low (10%), medium (30%), strobe (8 Hz), SOS. Note that the diameter stated in the title and description was 17 mm (for almost 2 years).

Last updated 17 Mar 2015.

DL-006

106487

DealExtreme

$3.70

Buck driver

3.6-9.0 V 1    

1000 mA

5 17 mm x 6 mm high - two boards in double layer Five modes, weird mode order; medium (30%), low (8%), high, strobe (8 Hz), SOS.

Last updated 17 Mar 2015.

DRY driver

CNQ001349

CN Quality Goods

$5.00 + shipping

Step-down (non-buck) driver

3.0-4.2 V 3 3x Li-ion  

2250 mA

4 23 mm Incomplete specifications given. I believe this is designed for a DRY torch (host available) with 3x XM-L in series, run from 3x Li-ion in series. Buyer beware - do not use this driver with unprotected Li-ion cells in that host.

4 modes with memory; low (0.1 A), medium (0.5 A), high (2.25 A), turbo (direct drive, maximum 4-5 A). Turbo mode steps down to high mode after 20 seconds.

Last updated 17 Mar 2015.

DW Powerbuck 5A

CPF member

$47.50 (approx)
€35 (actual) + shipping

Buck driver

6.0-20 V 1-4   89-98%

5000 mA
constant current

1 26 mm x 13 mm high Available direct from a CPF member. Input cut-off voltage is 4.5 V but output current will decrease under 6 V input.

Last updated 10 Jun 2011.

DW Powerbuck 9A

CPF member

$47.50 (approx)
€35 (actual) + shipping

Buck driver

6.0-20 V 1-4   89-98%

9 A
constant current

1 26 mm x 13 mm high Available direct from a CPF member. Input cut-off voltage is 4.5 V but output current will decrease under 6 V input.

Last updated 10 Jun 2011.

DW Powerbuck Adjustable

CPF member

$54.00 (approx; actual €41) + shipping

Buck driver

6.0-22 V 1-4   89-98%

9 A
constant current

1 23 mm x 13 mm high Available direct from a CPF member. Input cut-off voltage is 4.5 V but output current will decrease under 6 V input. Output current adjustable with potentiometer, in the range 0.5-9.0 A (or possibly 0.5-5.0 A). Input voltage must be at least 2V above output voltage.

Last updated 17 Mar 2015.

GDuP

1153

Sandwich Shoppe

$48.00 + shipping

Boost driver and buck driver

1.8-5.4 V 1 2-3x alkaline,
1x Li-ion
 

700 mA
constant current

3 14 mm Three modes; default set 10 mA, 180 mA, 700 mA. Levels can be changed for an extra charge. Mode memory.

Last updated 10 Jun 2011.

GDuP high output

1291

Sandwich Shoppe

$49.80 + shipping

Boost driver and buck driver

1.8-5.4 V 1 2-3x alkaline,
1x Li-ion
 

1200 mA
constant current

3 14 mm Three modes; default set 20 mA, 180 mA, 1.2 A. Levels can be changed for an extra charge. Mode memory.

Last updated 10 Jun 2011.

H6CC

h6cc

TaskLED

$32.00 + shipping

Buck driver

8.1-24 V 1-5   80-95%

6700 mA
constant current

1 31 mm x 9 mm high Formerly called H5CC. Suitable for SST-50. Output current variable from 20 mA up to 6.7 A. Overhead is 1.0 V at 5 A output. Not suitable for connecting multiple drivers in parallel. First 20 units have a maximum input of 20 V. Information thread here.

Last updated 16 Mar 2012.

H6Flex

h6flex

TaskLED

$40.00 + shipping

Buck driver

7.0-21 V 1-6   90%

6600 mA
constant current

5 33 mm Features uController UI, "User menu reconfigurable to 1400mA/­2000mA/­2800mA/­3600mA/­5000mA/­5600mA or 6600mA at any time." Ships configured for 1.4 A output. Input voltage needs to be at least 1 V higher than output voltage (at 2.8 A).

Last updated 10 Jun 2011.

HDX 12VAC

48106

DealExtreme

$9.00

Buck driver

12-12 V DC; also works with AC 1

1 LED included

   

330 mA

1   Product is labelled "AC12" and hence DX description says it accepts 12 V. Output current stated on driver is likely an error and should probably be 330 mA. Output 2-5 V.

1 blue LED included (in a fancy aluminium holder).

Last updated 10 Jun 2011.

Hi-Max HM-ST50D

830

LCK-LED

$12.00 + shipping

Buck driver

5.0-8.4 V 1 2x Li-ion  

4200 mA

5 20 mm x 17 mm high - two boards in double layer Five modes - medium (30%), low (10%), high (100%), 9 Hz strobe, SOS.

Last updated 10 Jun 2011.

hipCC

hipcc

TaskLED

$24.00 + shipping

Buck driver

4.5-25 V 1-5   77-97%

2800 mA
constant current

1 28 mm Limited supply. Buck regulator. Constant current output 2.8 A. Headroom 0.5 V. Thermal protection, polarity protection. Single mode but can be driven using a separate PWM driver.

Last updated 10 Jun 2011.

hipFlex v1.1A

hipflex

TaskLED

$35.00 + shipping

Buck driver

4.5-24 V 1-6   73-95%

2800 mA
constant current

1 36 mm Buck regulator, can drive up to 22 V of series connected LEDs. Constant current output user reconfigurable at any time to 1.0/1.4/2.0/2.4/2.8 A. Headroom 0.5 V @ 2.8 A. Thermal protection, polarity protection.

Last updated 10 Jun 2011.

HS1685B, "700mA" buck driver

1127409

FastTech

$2.93

Buck driver

3.0-8.4 V 1 2x Li-ion  

3000 mA

5 17 mm x 7 mm high - two boards in double layer 5 modes in an unusual order; high, medium, strobe, SOS, low. The driver is claimed to be 700 mA but the test data listed gives about 3 A: "We have been testing multiple drivers from multiple batches, and results repeatedly show ~3A output, while the manufacturer insists 0.7A." - buyer beware. The test data indicates output current drops with less than 4.5 V input, but one of the reviews says it went up to 3.94 A with two Li-ion cells. With the other review saying his one just glowed and died with a funny smell, this is a driver for masochists.

Last updated 17 Mar 2015.

HX-1105b5 with SST-50

1940701

FastTech

$15.15

Buck driver

9-15 V 1

1 LED included

12 V DC  

5000 mA

5 26 mm Output voltage 3-3.7 V. Specs elsewhere indicate input voltage is 3-18 V, and output current may be any where from 3 A to 5 A - buyer beware. Probably 5 modes; low (10%), medium (50%), high, strobe, SOS.

Includes a Luminous SST-50 warm white LED.

Last updated 17 Mar 2015.

HX-1175b1 buck driver

1940700

FastTech

$25.92

Buck driver

9-15 V 1

1 LED included

12 V DC  

9 A

5 32 mm Output voltage 3-3.7 V. Specs else where indicate input voltage is 3-18 V and output current 7 A - buyer beware. Probably 5 modes; low (10%), medium (50%), high, strobe, SOS.

Includes a Luminous SST-90 warm white LED.

Last updated 17 Mar 2015.

HX-1182, buck driver

241101

DealExtreme

$3.60

Buck driver

7.0-18 V 1-3 2-4x Li-ion 90%

1500 mA

4 22 mm x 19 mm high Buyer beware - originally listed with many conflicting specs. Output current 0.8-1.5 A (which sounds very unregulated). Output voltage 3.0-8.4 V sounds suspiciously like an input voltage for 1 or 2 Li-ion cells. Output supposedly suitable for 1 or 3 LEDs. 4 mode; high (1.5 A), medium (1.2 A), low (0.8 A), fast strobe. Polarity protection.

Last updated 17 Mar 2015.

HX-1190B5 (Olympia), 6A 4 mode buck

231936

DealExtreme

$5.10

Buck driver

7.0-18 V 1 3-4x Li-ion 90%

6000 mA
constant current

4 28 mm Buyer beware - may actually be a boost driver with much less than 6 A output.

4 mode with 3 second memory; high (6 A), medium (4 A), low (2 A), fast strobe. Formerly claimed 5 modes, including "Close" (SOS?). Formerly claimed to be suited for 1 to 3 LEDs in series. Formerly claimed 30 mm diameter. Output voltage 3.3-10 V. Polarity protection. Appears to have LEDs for indicating battery voltage. For a 4 A version see DX sku.231788.

Last updated 17 Mar 2015.

HX-1297b, 4A 4 mode buck

231788

DealExtreme

$4.40
(backordered)

Buck driver

7.0-18 V 1-3 3-4x Li-ion 90%

4000 mA
constant current

4 30 mm Buyer beware - appears to be designed for two separate LEDs at ~1 A and ~1.5 A, not a single LED at 4 A total.

4 mode with 3-second memory; high (4 A), medium (2 A), low (0.1 A), fast strobe. Formerly claimed 5 modes, including "Close" (SOS?). Output voltage 3.3-10 V. The board looks like it has places for battery indicator LEDs but they are populated with resistors. Polarity protection. For a 6 A version see DX sku.231936 or for a 4 A version with battery status LEDs see DX sku.236160.

Last updated 20 Mar 2015.

HX-1341, 4A 4 mode buck

236160

DealExtreme

$5.20

Buck driver

7.0-18 V 1-3 3-4x Li-ion 90%

4000 mA

4 28 mm 4 mode with 3 second memory; high (4 A), medium (2 A), low (100 mA), fast strobe. Formerly claimed 5 modes, including "Close" (SOS?). Output voltage 3.3-10 V. Polarity protected. There are two battery status LEDs are on the board.

Last updated 17 Mar 2015.

Hyperbuck v1.0

hbuck

TaskLED

$40.00 + shipping
(sold out and/or discontinued)

Buck driver

8.0-80 V 1-15    

1500 mA

1 36 mm x 31 mm Maximum output voltage 50 V. Output open circuit and short circuit protected; reverse polarity protected. Supports external potentiometer for dimming. Vin must be at least 2 V greater than Vf.

Last updated 10 Dec 2014.

IHX-1183A, 700mA

1677800

FastTech

$3.98

Buck driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

700 mA

1 20 mm Output voltage 3.2-3.8 V.

Includes a Cree XR-E (Q3 bin) cool white LED.

Last updated 17 Mar 2015.

IHX-1183A, 900mA

1675106

FastTech

$3.75

Buck driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

900 mA

1 20 mm Output voltage 3.2-3.8 V.

Includes a Cree XP-G (R5 bin) warm white LED.

Last updated 17 Mar 2015.

IS1006
(SST-90 linear driver)

IS1006

CPF member

$25.00 + shipping

Linear regulator

3.0-12 V 1-4 4x NiMH "is probably the best configuration available"  

10 A
constant current

2 26 mm The specs for this driver listed in this table may not be correct, as incomplete specs are listed in the sales thread and the specs thread isn't linked from it. (It might be this one but it has conflicting specs from the few that are actually listed in the sales thread.) Different versions are available, with high mode 5 A, 8 A or 10 A, and low mode from 1.2 A up. Switching between modes required a toggle switch or potentiometer (not included). Driver draws 0.5 mA when off.

Last updated 10 Jun 2011.

JH-002A

278226

DealExtreme

$3.93

MR16 (buck) driver

10-20 V 3    

3000 mA
constant current

1 75 mm x 10 mm x 6 mm Output voltage 9.0-9.5 V. Dimmable, 1.5-5.0 V control signal. Buyer beware - claims to be a boost driver, and output current is suspect.

Last updated 20 Mar 2015.

JR-LED 5W

321658

DealExtreme

$3.33

Boost driver and buck driver

3.0-4.2 V 1

1 LED included

1x Li-ion  

900 mA

1 20 mm Unknown regulation method; the inductor implies boost and/or buck.

One warm white LED included.

Last updated 17 Mar 2015.

JR-M16-2*2

197205

DealExtreme

$1.75
(up from $1.70)

MR16 (buck) driver

8.0-12 V DC; also works with AC 1-3 12 V DC, 12 V AC  

600 mA
constant current

Can be modified to 1000 mA

1 28 mm x 17 mm x 11 mm Driver chip probably MC34063A (which has a 1.5 A maximum and is specified for DC-DC converters, not constant current LED drivers), with SS14 Schottky diodes. Said to be suited for 2 series, 2 parallel LEDs; it can probably handle 1-3 LEDs just fine.

Last updated 18 Mar 2015.

JR-M16-3*1W, MR16 driver

207780

DealExtreme

$1.64

MR16 (buck) driver

11-13 V DC; also works with AC 3 12 V AC or DC  

300 mA
constant current

Can be modified to 1000 mA

1 29 mm x 18 mm x 10 mm Output voltage 9-11 V. Driver chip MC34063A (which has a 1.5 A maximum and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diodes.

Last updated 18 Mar 2015.

JRLED-10W-B low voltage driver

352548

DealExtreme

$4.32

Buck driver

12-14 V DC; also works with AC 3

1 LED included

12 V AC or DC  

700 mA

1 29 mm x 18 mm x 11 mm Output voltage 9-11 V.

One blue 3s3p LED array included.

Last updated 17 Mar 2015.

JRLED-10W-W low voltage driver

353775

DealExtreme

$3.72

MR16 (buck) driver

12-14 V DC; also works with AC 3

1 LED included

12 V AC or DC  

700 mA

1 29 mm x 18 mm x 11 mm Output voltage 9-11 V.

One cool white 3s3p LED array included.

Last updated 17 Mar 2015.

JRLED-10W-WW low voltage driver

353774

DealExtreme

$3.72

Buck driver

12-14 V DC; also works with AC 3

1 LED included

12 V AC or DC  

700 mA

1 29 mm x 18 mm x 11 mm Output voltage 9-11 V.

One warm white 3s3p LED array included.

Last updated 17 Mar 2015.

JRLED-MR16-9W

374572

DealExtreme

$4.66 for 5

MR16 (buck) driver

12-14 V DC; also works with AC 3 12 V DC  

625 mA

Can be modified to 1000 mA

1 29 mm x 18 mm x 12 mm Output voltage 9-12 V. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode.

Last updated 17 Mar 2015.

JRLED-MR16-9W

396864

DealExtreme

$6.17 for 10

MR16 (buck) driver

12-17 V DC; also works with AC 1 12 V AC,
12 V DC
 

300 mA

1 28 mm x 18 mm x 11 mm Output voltage 3-4 V. Driver chip MC34063A, with SS14 Schottky diode.

Last updated 6 Feb 2016.

Kennan (Nanjg 07)

KaiDomain

$3.10
(sold out and/or discontinued)

Buck driver

5.0-18 V 1-3   79-91%

750 mA
constant current

1 17 mm Buck regulator based on PT4105 chip. Constant current output. Off the shelf it's set to 750 mA, but this can be changed by using a different set resistor (original is soldered surface mount). Input voltage needs to be 1-3 V above output. Can output 1 A with more than 9 V in, but at an efficiency cost.

Last updated 12 Jul 2012.

Kennan 2 variants (Nanjg 21)

KaiDomain

$3.43
(sold out and/or discontinued)

Buck driver

5.0-18 V 1-3   60%

1000 mA
constant current

1 20 mm Buck regulator based on PT4105 chip. Constant current output. Off the shelf it's set to 1000 mA (even though that's out of spec for the regulator chip below 9 V in) but this can be changed by using a different set resistor (original is soldered surface mount). Input voltage needs to be 1-3 V above output, but the new components will shut the board down under 6.2V (2x Li-ion?). This thread discusses the control features of this new version. Efficiency perhaps as low as 60% thanks to running it out of spec and it also runs quite hot because of it. In summary, more versatile but not as useful.

Last updated 12 Jul 2012.

Kennan 3
(Nanjg 106)

S002982

KaiDomain

$4.25
(up from $4.08
up from $3.99)

Buck driver

4.0-18 V 1-3 4+ NiMH,
1+ Li-ion,
12 V car battery,
whatever
80-92%

1000 mA
constant current

1 17 mm November 2011: The present Kennan may be version 4; input voltage range previously claimed to be 3.6-23 V, now 4-18 V. It's still a good driver but it's more expensive than it needs to be, so no longer recommended. Consider KD sku S009736 or DX sku.26110 instead.

Buck regulator based on AX2002 chip. Constant current output, off the shelf set to 1 amp. Efficiency figures from AX2002 datasheet, but "AX2002" test results I've seen that may be of this board indicates 78-87% for a single LED below 1.4 A, sagging to 65% at 2.4 A.

Note: In italianboy's review (apparently lost with the Nov 2011 KD site update) he claims that 1 amp is outside the driver chip's limits. This is not true as the AX2002 can actually cope with 2.5 amps, although it will get very hot over 2 amps, meaning without heatsinking the thermal protection will probably turn it off after just a few minutes. Also, the other components on the Kennan 3 board may not be too happy at 2+ amps; the Schottky diode is an SS14, which has a 1 A limit.

The Case 1 and Case 2 examples mentioned on KD's site mention the 750 mA that an earlier Kennan driver was set to.

Formerly product ID 1640.

Last updated 23 May 2015.

L-mini II

the 134

Shining Beam

$10.75 + shipping

Boost driver and buck driver

2.8-5.5 V 1 1x Li-ion  

1000 mA
constant current

3 17 mm - two boards in double layer Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.

SKU 1219. Three mode, low (80 mA), medium (350 mA), high (1000 mA). Built-in voltage protection, will turn off at 2.8 V. Polarity protection.

Last updated 10 Jun 2011.

L30.3

L303

Lux-RC

$26.66 + shipping

Buck driver

3.8-12 V 1

1 LED included

  69-82%

1000 mA
constant current

1 18 mm Driver board with combined LED - Seoul P4 U2 (cool white). Board has 12 V maximum on it, but spec sheet shows 18 V maximum.
 
Seems identical to L30.4 except for an extra hole on the L30.4.

Last updated 10 Jun 2011.

L30.4

L304

Lux-RC

$26.66 + shipping

Buck driver

3.8-18 V 1

1 LED included

  69-82%

1000 mA
constant current

1 18 mm Driver board with combined LED - Seoul P4 U2 (cool white). Board has 12 V maximum on it, but spec sheet shows 18 V maximum.
 
Seems identical to L30.3 except for an extra hole on the L30.4.

Last updated 10 Jun 2011.

L31.2

L312

Lux-RC

$33.09 + shipping

Buck driver

3.5-18 V 1

1 LED included

  66-77%

1000 mA
constant current

1 15 mm Driver board with combined LED Cree XP-G R5 (cool white).

Last updated 10 Jun 2011.

L31.2E

L312-E

Lux-RC

$33.09 + shipping

Buck driver

3.5-18 V 1

1 LED included

  69-82%

1000 mA
constant current

1 15 mm Driver board with combined LED Cree XP-E R3 (outdoor white) for a narrower beam than the standard L312.

Last updated 10 Jun 2011.

L31.2N

L312-N

Lux-RC

$33.09 + shipping

Buck driver

3.5-18 V 1

1 LED included

  66-77%

1000 mA
constant current

1 15 mm Driver board with combined LED Cree XP-G R4 (neutral white).

Last updated 10 Jun 2011.

LD-21

p-490

Intl Outdoor Store

$8.50
For 1-2: + shipping
(sold out and/or discontinued)

Buck driver

3.3-10.0 V 1 1-2x Li-ion
2-3x CR123A
 

1000 mA
constant current

5 17 mm x 8 mm high - components on both sides Driver removed from site.

5 modes with memory; high (1 A), medium (300 mA), low (50 mA), strobe, SOS. Modes use PWM. Low voltage warning; light will slowly flash at 3.3 V (which seems very conservative) and 6.2 V.

Last updated 18 Jan 2016.

LD-29, 2.8A

p-416

Intl Outdoor Store

$8.95
For 1-2: + shipping
(sold out and/or discontinued)

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

2800 mA
constant current

5 19 mm x 9 mm high - two boards in double layer Driver removed from site.

5 modes with memory (claims to not use PWM); high (2.5 A one cell, 2.8 A two cells), medium (700 mA), low (100 mA), strobe, SOS. Constant current output with two cells. Low voltage protection, at 3 V/5.8 V; drops to low mode and starts flashing.

Last updated 18 Jan 2016.

LD-33

CNQ001633

CN Quality Goods

$9.90 + shipping

Buck driver

9-17 V 3 3-4x Li-ion  

2500 mA

5 24 mm x 15 mm high - components on both sides 5 modes with memory; high, medium (700 mA), low (100 mA), strobe, SOS. Change to alternate group with no flashing modes with momentary switch push at the right time. Low voltage warning at 9 V and 12 V. Also available from Intl Outdoor Store p-489.

Last updated 17 Mar 2015.

LD-33

p-489

Intl Outdoor Store

$9.50
For 1-2: + shipping
(sold out and/or discontinued)

Buck driver

9-17 V 3 3-4x Li-ion  

2500 mA
constant current

5 24 mm x 15 mm high - components on both sides Driver removed from site.

5 modes with memory; high (2.5-2.6 A), medium (700 mA), low (100 mA), strobe, SOS. Two mode groups, featuring a group without flashing modes. Does not use PWM. Low voltage warning; light will slowly flash at 9 V and 12 V.

Last updated 18 Jan 2016.

LD-4B 2.4A Buck Driver

p-817

Intl Outdoor Store

$4.86

Buck driver

3.0-16 V 1-2 1-3x Li-ion  

2400 mA
constant current

3 17 mm x 10 mm high 1 mode and 3 mode versions; high, medium (750 mA), low (50 mA). Always starts in high (great shame). Output voltage up to 6.6 V. Polarity protection. For some reason is described as suitable for 2x XP-G2 in series (rated at 1500 mA) / 2x XP-E2 in series (rated at 1000 mA). The response from the shop is that those LEDs can be run that hard and modders completely ignore maximum ratings now. An XP-E2 at 2.4 A? Why? He's taken leave of his senses. Buyer beware.

Last updated 18 Jan 2016.

LD10W

710

LCK-LED

$4.45 + shipping

Buck driver

12-14 V DC; also works with AC
(12 V AC maximum)
1-3   90-95%

1000 mA

1 43 mm x 23 mm x 9 mm "Designed for 10W High Power LED" doesn't quite say how many LEDs it's for, so the 1-3 in this table is only a guess. The specifications for this driver are suspiciously similar to a mains driver from the same retailer. Buyer beware.

Last updated 10 Jun 2011.

LDV9

501

LCK-LED

$9.45 + shipping

Buck driver

5.5-15 V
(preferred less than 12 V)
1   90-95%

2800 mA

3 19 mm Three modes - low (5%), high (100%), medium (35%). Switches to low mode on over-temperature. Output claimed to be constant current and either 3.0 amps or 2.8 amps. Input variously listed at 5.5-15 V (with <12 V preferred), 5.5-13.2 V, and 4.0-12.0 V. 90-95% efficient seems to be the default claim by this retailer. The claim to provide 1+ hours of 3 A output from four Eneloop cells is clearly false for a Cree MC-E or SSC P7. With a LED Vf of 3.4 V (MC-E) that's 10.2+ Wh output from less than 8.5 Wh input (Eneloop @ 2.25 A, assumed driver 95% efficient for estimating battery voltage under load). This also raises doubt about the constant current claim. Buyer beware.

Last updated 10 Jun 2011.

LE-LL208

343

Sure Electronics

$1.99
(formerly $1.43) + shipping
(sold out and/or discontinued)

Buck driver

5.0-24 V
(7-15 V suggested)
1-4   73%

285 mA
constant current

1 24 mm x 24 mm Driver has been removed from retailer's web site. Actual output current may vary from 240 mA to 310 mA. Possibly a clearance product; claim to have free shipping could not be verified.

Last updated 10 Jun 2011.

LE-LL209

344

Sure Electronics

$3.99
(formerly $2.89) + shipping
(sold out and/or discontinued)

Buck driver

6.0-15 V 1-4   78%

700 mA
constant current

1 24 mm x 24 mm Driver has been removed from retailer's web site. Actual output current may vary from 650 mA to 710 mA.

Last updated 10 Jun 2011.

LE-LL310

1041

Sure Electronics

$2.99 + shipping

Buck driver

9-35 V 1-8   96%

350 mA

1 25 mm x 25 mm "1 W LED Driver Based on MBI6651". Although claimed to be "constant current" the output current drops the more LEDs it's driving and rises the higher the input voltage. Claimed efficiency @ 12 V input with 3 LEDs.

Last updated 10 Jun 2011.

LE-LL311

1035

Sure Electronics

$4.99 + shipping

Buck driver

9-35 V 1-8   96%

700 mA

1 25 mm x 25 mm "3 W LED Driver Based on MBI6651". Although claimed to be "constant current" the output current drops the more LEDs it's driving and rises the higher the input voltage. Claimed efficiency @ 12 V input with 3 LEDs.

Last updated 10 Jun 2011.

LE-LL312

1042

Sure Electronics

$6.99 + shipping

Buck driver

9-35 V 1-6   96%

1020 mA

1 25 mm x 25 mm "5 W LED Driver Based on MBI6651". Although claimed to be "constant current" the output current drops the more LEDs it's driving and rises the higher the input voltage. Claimed efficiency @ 12 V input with 3 LEDs.

Last updated 10 Jun 2011.

LE-LL313

1125

Sure Electronics

$7.99 + shipping
(sold out and/or discontinued)

Buck driver

9-35 V 1-3   96%

1500 mA

1 25 mm x 25 mm Driver has been removed from retailer's web site. Although "constant current" the output current drops the more LEDs it's driving and rises the higher the input voltage. Claimed efficiency @ 12 V input with 3 LEDs.

Last updated 10 Jun 2011.

LE-LL315

1043

Sure Electronics

$1.99 + shipping

Buck driver

9-35 V 1-7   96%

150 mA

1 25 mm x 25 mm "0.5 W LED Driver Based on MBI6651". Although claimed to be "constant current" the output current drops the more LEDs it's driving and rises the higher the input voltage. Claimed efficiency @ 12 V input with 3 LEDs.

Last updated 10 Jun 2011.

LED AC DC Dimmer

863

Best Hong Kong

$6.49 + shipping

Linear regulator

5.0-24 V DC; also works with AC
(5-16 V AC)
1-7    

700 mA

1 54 mm x 26 mm Apparently a voltage-controlled driver with the output voltage set using a potentiometer; output voltage 1.5-22 V (use that potentiometer with care). There's an implication this driver should be used with a resistor in series with the LEDs. Claimed "max 700 mA, peak 2 A" is contradictory. Built-in rectifier for AC or DC operation. Unknown operation method but thought to be a linear regulator because of the presence of a large heat sink on the board.

Last updated 10 Jun 2011.

LED Slave

66

PCB Components

$16.50 (approx)
€11.95 (actual) + shipping

Buck driver

6.0-30 V 1-6   95%

1000 mA

1 25 mm x 18 mm x 5 mm 1 V overhead. Efficiency listed is maximum; typical efficiency unknown. Reverse polarity protection, soft start.

Last updated 22 Dec 2011.

LED Slave with dimmer

67

PCB Components

$29.00 (approx)
€20.95 (actual) + shipping

Buck driver

6.0-30 V 1-6   96%

1000 mA
constant current

1 29 mm x 17 mm x 5 mm 1 V overhead. Dimming by PWM with an onboard RISC chip(!) or with DC input signal. Efficiency listed is maximum; typical efficiency unknown. Reverse polarity protection.

Last updated 22 Dec 2011.

Low voltage 9W driver

403086

DealExtreme

$4.69

Buck driver

12-24 V DC; also works with AC 1-3 12 V, 24 V AC/DC 85%

900 mA
constant current

1 63 mm x 30 mm x 20 mm Output voltage 3-10 V. IP67 dust/water rating. Suitable for 3S3P LED arrays.

Last updated 6 Feb 2016.

LT-3090-350, 3 Channel Power Repeater

690

LCK-LED

$30.00 + shipping

Buck driver

12-48 V 3-36    

350 mA
constant current

1 121 mm x 39 mm x 39 mm 1-12 LEDs on each of three 350 mA channels. Conflicting specifications, 48 V max input in title, but 24 V max input in description. Manual also says 48 V. Can be used with RGB controller.

Last updated 23 Oct 2011.

LT-3090-700, 3 Ch Power Repeater

691

LCK-LED

$35.00 + shipping

Buck driver

12-48 V 3-36    

700 mA
constant current

1 121 mm x 39 mm x 39 mm 1-12 LEDs on each of three 700 mA channels. Manual. Can be used with RGB controller.

Last updated 23 Oct 2011.

Ludde (USB car supply)

688

DealExtreme

$3.31
(up from $2.86,
up from $2.58,
up from $2.53)
(sold out and/or discontinued)

Buck driver

10-14.5 V
(approx)
0

1 LED included

12 V car battery  

1000 mA

1 100 mm long Buck regulator, not specifically a LED driver but is an inexpensive way to get a low voltage LED driver working with 12 V. Designed to plug into a car lighter socket to provide a USB socket. Constant voltage output 5.5 V (not actually within USB spec, which is maximum 5.25 V). Can do somewhere around 700-1000 mA before dropping out of regulation. Cute little red LED to show it's working.

Tip: Does not charge iPods but there is a work-around using a couple of resistors to apply a mid-voltage to the two data pins.

Last updated 3 Apr 2014.

Magnetic control, 3A 3 mode LED driver

S022191

KaiDomain

$11.82

Step-down (non-buck) driver

2.7-4.2 V 1 1x Li-ion  

3000 mA

3   8 mm high - two boards in double layer Unknown diameter - buyer beware. 3 modes; high (100%), medium (50%), low (10%). Thermal protection, low voltage protection.

Last updated 17 Mar 2015.

Magnetic control, 3A 5 mode LED driver

S022192

KaiDomain

$11.82

Step-down (non-buck) driver

2.7-4.2 V 1 1x Li-ion  

3000 mA

5   8 mm high - two boards in double layer Unknown diameter - buyer beware. 3 modes; high (100%), medium (50%), low (10%), 10 Hz strobe, SOS. Thermal protection, low voltage protection.

Last updated 17 Mar 2015.

MC-E Color and Dynamic White 17mm RGBW Driver

p-686

Intl Outdoor Store

$6.75

Step-down (non-buck) driver

3.0-4.2 V 1-4 1x Li-ion  

2800 mA

12 17 mm Designed to be used with common positive multi-colour RGBW LEDs such as this 4 colour MC-E or a dynamic white MC-E. Four channel; 600-700 mA per channel. 12 modes in 2 groups; change group by soldering/switching stars. See p-687 for 20 mm version.

Last updated 18 Jan 2016.

MC-E Color and Dynamic White 20mm RGBW Driver

p-687

Intl Outdoor Store

$6.85
(sold out and/or discontinued)

Step-down (non-buck) driver

3.0-4.2 V 1-4 1x Li-ion  

2800 mA

12 20 mm Driver removed from site.

Designed to be used with common positive multi-colour RGBW LEDs such as this 4 colour MC-E or a dynamic white MC-E. Four channel; 600-700 mA per channel. 12 modes in 2 groups; change group by soldering/switching stars. See p-686 for 17 mm version or p-645 for a single group 20 mm version.

Last updated 18 Jan 2016.

MC-E Colour Multi-Mode RGBW Circuit Board

p-645

Intl Outdoor Store

$5.79
(sold out and/or discontinued)

Step-down (non-buck) driver

3.0-4.2 V 1 1x Li-ion  

2800 mA

8 20 mm Driver removed from site.

Microcontroller with 4 D882 transistors; unknown regulation quality. Designed to be used with common positive multi-colour RGBW LEDs such as this 4 colour MC-E. Output current is 4x 700 mA. 8 modes without memory; white, red, green, blue, white-red-green-blue strobe, red-blue police strobe, white strobe, red SOS.

Last updated 18 Jan 2016.

MC-E/P7 bad driver

S005296

KaiDomain

$12.18
(up from $12.01)

Buck driver

5.5-15 V 1   76-83%

2800 mA

1 17 mm double sided board (formerly 19 mm) It's hard taking KD's site seriously when so many random colours and sizes of text is used to describe the board, with missing graphics liberally distributed as well. (The site has since been updated.) Inconsistent specifications, with output current listed as 2.8 A and 3.0 A and input voltage listed as 5.5-15 V and 4.0-12.0 V. Three mode; low (5%), high (100%), medium (35%) - also listed as high (2.8 A), medium (1.38 A [49%]), low (0.25 A [9%]). The runtimes given don't stack up. There are two versions (with 3 and 5 modes) which look identical and either might be sent to fill an order. Buyer beware.

This driver gets a bad review here. StefanFS here says it gets really hot with 8 AA cells, while CM here calculates over 2 W of heat dissipated in high mode - toasty - while showing the claimed 90-95% efficiency is imaginary.

Appears to be the same as e-lectronics sku 464.

Formerly product ID 1866.

Last updated 16 Mar 2012.

MC-E/P7 driver, 5 mode

S007542

KaiDomain

$8.18 each
(up from $7.99),
also available in 5 pack

Buck driver

5.5-12 V 1    

3000 mA

5 19 mm Uses PWM for 5 modes; low (10%), medium (50%), high (100%), fast strobe, SOS. If driving a Cree MC-E its four dice must be parallel connected. Also available as a 5 pack. Both product pages have photos of two different drivers. Buyer beware.

This driver gets a bad review here.

Formerly product ID 7947.

Last updated 16 Mar 2012.

Micro 1500

96

PCB Components

$29.00 (approx)
€19.95 (actual) + shipping

Buck driver

5.0-28 V 1-10   94%

1500 mA
constant current

1 23 mm 1 V overhead. External PWM input. Efficiency claimed is maximum; typical efficiency unknown.

Last updated 22 Dec 2011.

Micro 2800

95

PCB Components

$29.00 (approx)
€19.95 (actual) + shipping

Buck driver

5.0-18 V 1-4   94%

2800 mA
constant current

1 23 mm 1 V overhead. Efficiency claimed is maximum; typical efficiency unknown. Report from a reader: "I have tested it [for] hundreds hours, no problems and no need to heatsink for 2 LEDs with 9 V."

Last updated 22 Dec 2011.

MicroPuck

02009...

LED Supply

$9.99 + shipping

Boost driver and buck driver

0.8-3.0 V
(as boost; 4.0-8.0 V as buck)
1-2   62-89%

500 mA

1 12 mm x 8 mm x 7 mm Can be used as either a buck, or boost, or buck/boost driver - see the Application Notes for connection diagrams and other info. Not a constant current output; they claim this is a design feature to mimic the light dropoff of an incandescent bulb. I'm not convinced. Maximum 8 V output. Can be used in parallel. Efficiency as a boost driver claimed 70-82% (measured at 64-78% in a test with an XP-G here), as a buck driver 82-89%; as a buck/boost driver 62-72%. The datasheet doesn't claim an IP rating but does say "The 2009A is encapsulated by an insulating epoxy and is resistant to harsh environments and moisture."

Available in three versions with nominal outputs of 350, 400 (error in window title bar) and 500 mA.

Last updated 16 Mar 2012.

Mini Constant Current Power Supply with rectifier,
9 versions 20-100 mA

Led-Tech

$2.80 (approx)
€1.99 (actual) + shipping

Linear regulator

6.5-38 V DC; also works with AC
(4.5-26 V AC)
1-10   7-45%

100 mA
constant current

1 16 mm x 7.5 mm x 3 mm Linear regulator based on a LM317 voltage regulator chip, with a rectifier so it can cope with AC (and can be connected either way with DC). Available in nine versions providing 10 mA, 20 mA, 30 mA, 40 mA, 50 mA, 60 mA, 70 mA, 80 mA and 100 mA. Supply voltage needs to be at least 3.8 V higher than total LED Vf and not more than 38, 27, 18, 14, 12, 10, 9, 8 or 7 V higher respectively for the different versions. Efficiency figures are given for a single LED but could theoretically be as high as 90% for a string.

Last updated 16 Mar 2012.

Mini Constant Current Power Supply,
9 versions 10-100 mA

Led-Tech

$2.80 (approx)
€1.99 (actual) + shipping

Linear regulator

5.2-37 V 1-10   7-52%

100 mA
constant current

1 16 mm x 7.5 mm x 3 mm Linear regulator based on a LM317 voltage regulator chip, available in nine versions providing 10 mA, 20 mA, 30 mA, 40 mA, 50 mA, 60 mA, 70 mA, 80 mA and 100 mA. Supply voltage needs to be at least 2.5 V higher than total LED Vf and not more than 37, 27, 18, 14, 12, 10, 9, 8 or 7 V higher respectively for the different versions. Efficiency figures are given for a single LED but it could theoretically be as high as 93% for a string.

Last updated 16 Mar 2012.

Mini SMD Buck

79

PCB Components

$11.40 (approx)
€7.95 (actual) + shipping

Buck driver

3.5-9.0 V 1   92%

1100 mA

1 17 mm Output drops out of regulation below 4.5 V input, which probably means 1 V overhead. Efficiency claimed is maximum; typical efficiency unknown.

Last updated 22 Dec 2011.

MR16 1x1W

61373

goodluckbuy.com

$1.80
(up from $1.41)
(sold out and/or discontinued)

MR16 (buck) driver

12-12 V DC; also works with AC 1 12 V car battery 90%

350 mA

1   Product removed from retailer's site.

Slightly dodgy specs. Claimed output voltage 2.2-2.4 V is probably wrong. Built-in rectifier, so can be used with AC.

Last updated 13 Aug 2012.

MR16 1x1W

42386

goodluckbuy.com

$2.70
(up from $2.61)

MR16 (buck) driver

12-16 V DC; also works with AC 1 12 V car battery  

330 mA

1 19 mm x 14 mm x 13 mm Built-in rectifier, so can be used with AC.

Last updated 16 Apr 2012.

MR16 1x3W

61374

goodluckbuy.com

$1.92
(up from $1.41)
(sold out and/or discontinued)

MR16 (buck) driver

12-12 V DC; also works with AC 1 12 V car battery 90%

600 mA

1   Product removed from retailer's site.

Output voltage 3.2-3.6 V. Built-in rectifier, so can be used with AC.

Last updated 13 Aug 2012.

MR16 1x3W

42385

goodluckbuy.com

$2.70
(up from $2.61)

MR16 (buck) driver

12-16 V DC; also works with AC 1 12 V car battery  

650 mA

1 18 mm x 14 mm x 14 mm Dodgy specs that suspiciously mirror DealExtreme mistakes. Built-in rectifier, so can be used with AC.

Last updated 16 Apr 2012.

MR16 3W driver

66270

DealExtreme

$3.55 for 5
(down from $5.20)

MR16 (buck) driver

12-12 V DC; also works with AC 1-3 12V AC or DC 85%

300 mA

Can be modified to 1000 mA

1 28 mm x 18 mm x 8 mm Output voltage 3-10.5 V. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode.

Last updated 1 Jul 2014.

MR16 3W driver

66273

DealExtreme

$3.99 for 5
(down from $6.20)

MR16 (buck) driver

12-18 V DC; also works with AC 1-3 12 V AC or DC 80%

650 mA

Can be modified to 1000 mA

1 28 mm x 18 mm x 8 mm Buyer beware - specs are contradictory (1-3x1W or 650 mA?). Output voltage 3-10 V. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode.

Last updated 5 Jul 2014.

MR16 3x1W

61372

goodluckbuy.com

$1.46
(up from $1.41)
(sold out and/or discontinued)

MR16 (buck) driver

12-12 V DC; also works with AC 3 12 V car battery 90%

300 mA

1   Product removed from retailer's site.

Slightly dodgy specs. Claimed output voltage 2.2-2.4 V is probably wrong, since it also claims to drive 3 LEDs. Built-in rectifier, so can be used with AC.

Last updated 13 Aug 2012.

MR16 3x1W

42387

goodluckbuy.com

$2.70
(up from $2.61)

MR16 (buck) driver

12-16 V DC; also works with AC N/A 12 V car battery  

330 mA

1 15 mm x 14 mm x 14 mm Built-in rectifier, so can be used with AC.

Last updated 16 Apr 2012.

MR16 4W driver

66271

DealExtreme

$4.61 for 5
(down from $5.20)

MR16 (buck) driver

12-12 V DC; also works with AC 1-4 12 V AC or DC 67-80%

300 mA

Can be modified to 1000 mA

1 28 mm x 18 mm x 8 mm Unknown operation method; presumed to be buck driver. Claimed output voltage 12-18 V, which would be impossible to do even with 12 V AC with just buck, implies buck/boost; this is almost certainly not the case. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode, and a bridge rectifier so it can be used with AC. Appears to be the same as DX 178343.

Last updated 1 Jul 2014.

MR16 6W driver

66272

DealExtreme

$3.99 for 5
(down from $6.20)

MR16 (buck) driver

12-12 V DC; also works with AC 3 12 V AC or DC 90%

410 mA

Can be modified to 1000 mA

1 28 mm x 18 mm x 8 mm Output voltage 10-12.5 V. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode.

Last updated 1 Jul 2014.

MR16 9W driver

66274

DealExtreme

$4.90 for 5
(in the More Options link;
list price $6.52,
up from $6.20)

MR16 (buck) driver

12-12 V DC; also works with AC 3 12 V AC or DC 90%

600 mA

Can be modified to 1000 mA

1 28 mm x 18 mm x 8 mm Claimed output voltage 9-12 V, which implies 4 LEDs but it's unclear if this is the case, and if so, how many volts DC input it will need. Driver chip MC34063A, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Driver comes with SS14 Schottky diode.

Available in the "More Options" link in the product page for $4.90.

Last updated 1 Jul 2014.

MR16 base, 3x1W

S009686

KaiDomain

$2.38 for 2
(up from $2.33)

MR16 (buck) driver

12-12 V DC; also works with AC 3    

350 mA

1 27 mm x 24 mm x 9 mm Incomplete and/or stupid specifications given. Looks like it has a built-in rectifier, so can be used with AC.

Formerly product ID 10937.

Last updated 21 Nov 2011.

MR16 base, 4x1W

S009687

KaiDomain

$2.80 for 2
(up from $2.73)

MR16 (buck) driver

12-12 V DC; also works with AC 4    

350 mA

1 27 mm x 24 mm x 9 mm Incomplete and/or stupid specifications given. Looks like it has a built-in rectifier, so can be used with AC.

Formerly product ID 10938.

Last updated 21 Nov 2011.

MR16 driver with 3x red LED

1163700

FastTech

$8.34

MR16 (buck) driver

12-12 V DC; also works with AC 3

3 LEDs included

12 V AC or DC  

320 mA

1 18 mm x 14 mm x 10 mm Output current is a guess.

Includes 3x 1W red LEDs mounted on a 50 mm diameter board.

Last updated 17 Mar 2015.

MR16 driver, 3W

47354

DealExtreme

$1.71
(down from $2.10)

MR16 (buck) driver

12-17 V DC; also works with AC
(12 V AC)
1-3    

300 mA

Can be modified to 1000 mA

1 25 mm x 14 mm x 11 mm Incomplete specifications given. MC34063A driver chip, which has a 1.5 A maximum (and is specified for DC-DC converters, not constant current LED drivers). Unknown input voltage range (12 V AC is about 17 V DC). Presumably it can drive 3 LEDs because it's called a "3W" driver. Built-in rectifier, probably four Schottky SS14 diodes.

There are MR16 sockets available for them - round (17 mm diameter) and rectangular (28 mm x 17 mm).

Tip: If using DC you wouldn't need the rectifier so you could short that out for a few percent efficiency gain, but it will still work with it left intact.

Last updated 5 Jul 2014.

MR16-base driver: 1x 1 W (v2)

13553

DealExtreme

$2.34
(down from $2.50
up from $2.20,
down from $2.25,
down from $2.34,
down from $2.53)

MR16 (buck) driver

8.0-25 V DC; also works with AC
(claimed 12-40 V for board is wrong as PT4115 is 30 V max)
1-8 2-4x Li-ion,
12 V car battery
80-92%

350 mA
constant current

Can be modified to 1000 mA

1 18 mm x 14 mm x 11 mm (31 mm x 18 mm x 11 mm including prongs and output terminals) Buck regulator based on PT4115 chip and Schottky SS14 diode. Earlier version EQB8L chip. They're not quite equivalent as the PT4115 will turn off under 8 V and the EQB8L will still work under 4 V (voltages not including the rectifier on this driver). Constant current out 330 mA - 370 mA (average 350 mA in this table); there's no difference between the two 1 W versions except maybe the set resistor (R270 for 370 mA or R300 for 330 mA). Built-in rectifier, normally four Schottky SS14 diodes.

There are MR16 sockets available for them - round (17 mm diameter) and rectangular (28 mm x 17 mm).

Tip: If using DC you wouldn't need the rectifier so you could short that out for an estimated 97% efficiency, but it will still work with it left intact.

Last updated 14 Mar 2015.

MR16-base driver: 1x 3 W (v2)

13557

DealExtreme

$1.99
(down from $2.13
down from $2.20,
down from $2.25,
down from $2.39,
down from $2.53)

MR16 (buck) driver

8.0-25 V DC; also works with AC
(claimed 12-40 V for board is wrong as PT4115 is 30 V max)
1-8 2-4x Li-ion,
12 V car battery
55-97%

700 mA
constant current

Can be modified to 1000 mA

1 18 mm x 14 mm x 11 mm (31 mm x 18 mm x 11 mm including prongs and output terminals) Buck regulator based on PT4115 chip and Schottky SS14 diode. Earlier version EQB8L chip. They're not quite equivalent as the PT4115 will turn off under 8 V and the EQB8L will work under 4 V (voltages not including the rectifier on this driver). Maximum voltage listed is from max rating for output capacitor. Constant current out 650-700 mA. Built-in rectifier, normally four Schottky SS14 diodes.

The PT4115 version is said to be quite good with one and quite good or excellent when driving two or more (unfortunately the test results to which I had linked have been withdrawn pending further investigation). For automotive use (~12V) the EQB8L version of this 3 W driver is not very efficient when driving only one LED, but quite good with two (84%); thus the EQB8L seems better suited to lower currents with single LEDs. There are a couple reports of this version emitting RF noise causing interference with car radios and remote locking, but most users haven't found any interference.

There are MR16 sockets available for them - round (17 mm diameter) and rectangular (28 mm x 17 mm).

Tip: If using DC and sure of polarity you wouldn't need the rectifier so you could short that out for an extra 4-6% efficiency gain, but it will still work with it left intact.

Last updated 14 Mar 2015.

MR16-base driver: 3x 1 W (v2)

13555

DealExtreme

$1.95
(down from $2.25
down from $2.34,
down from $2.53)

MR16 (buck) driver

8.0-25 V DC; also works with AC
(claimed 12-16 V AC for board)
1-8 2-4x Li-ion,
12 V car battery
80-95%

350 mA
constant current

Can be modified to 1000 mA

1 18 mm x 14 mm x 11 mm (31 mm x 18 mm x 11 mm including prongs and output terminals) Buck regulator based on PT4115 chip and Schottky SS14 diode. Earlier version EQB8L chip. They're not quite equivalent as the PT4115 will turn off under 8 V and the EQB8L will still work under 4 V (voltages not including the rectifier on this driver). Maximum voltage listed is from max rating for output capacitor. Constant current out 330 mA to 370 mA (average 350 mA in this table); there's no difference between the two 1 W versions except maybe the set resistor (R270 for 370 mA or R300 for 330 mA), but efficiency is unknown when running a 3 LED configuration. Built-in rectifier, normally four Schottky SS14 diodes.

There are MR16 sockets available for them - round (17 mm diameter) and rectangular (28 mm x 17 mm).

Tip: If using DC you wouldn't need the rectifier so you could short that out for a few percent efficiency gain, but it will still work with it left intact.

Last updated 14 Mar 2015.

MR16-base drivers:
1x 1 W,
3x 1 W,
1x 3 W

DealExtreme

$2.53
(sold out and/or discontinued)

MR16 (buck) driver

5.0-18 V DC; also works with AC
(DC for driver chip, claimed 12-16 V AC for board)
1-4 4-12x NiMH,
5-12x alkaline,
2-4x Li-ion,
12 V car battery
 

350 mA
constant current

1 18 mm x 14 mm x 14 mm Buck regulator based on the discontinued PT4105 chip - see separate notes below. Constant current out 320-350 mA for 1 W versions, 650-700 mA for 3W version (not 320-350 mA as stated).
 
These drivers have their own bridge rectifier using low-voltage Schottky diodes, so they can handle (low voltage) AC or DC input. While these drivers are claimed to handle 12-16 V AC, the PT4105 is only specified to handle up to 18 V input, so allowing for perhaps 0.4V drop on each of two Schottky diodes being used at any time in the rectifier, anything over about 13.7 Vrms AC would be outside the PT4105 spec.
 
Tip: If using DC you wouldn't need the rectifier so you could short that out, but it will still work (slightly less efficiently) with it left intact.

Last updated 4 Jul 2011.

Multi-cell driver

p-543

Intl Outdoor Store

$12.50
(sold out and/or discontinued)

Buck driver

5.5-12.6 V 1-3 2-3x Li-ion  

3500 mA
constant current

3 21 mm x 23 mm high - two boards in double layer Driver removed from site.

3 modes with memory; high, medium (30%), low (5%). PWM frequency 3.9 kHz. Thermal and low voltage warnings. Bottom board apparently does nothing except provide a 21 mm board and can be removed to leave just a 19 mm single board boost driver, 10 mm high, with components on both sides.

Last updated 18 Jan 2016.

Nanjg 112A

S009113

KaiDomain

$4.74 each (down from $4.82 while it was sold out, down from $5.02), also available in 5 pack
(sold out and/or discontinued)

Boost driver and buck driver

0.9-4.2 V 1 1x Li-ion  

1000 mA

5 17 mm Unclear what it does when input voltage is greater than LED Vf - possibly just direct drive, but it claims to buck. Similar to Nanjg 28 but with contacts for different mode groups like AK-47; with a suitable switch you could change between groups with 2, 3, 3 and 5 modes on the fly. Output current with 1x AA claimed to be 300-500 mA. This review says the low and medium modes are very close together.

Formerly product ID 10243. Also available as a 5 pack, S009114 (formerly product ID 10246).

Last updated 12 Jul 2012.

Nanjg 28

15880

DealExtreme

$5.35
(formerly $5.50)

Boost driver and linear regulator

0.9-4.5 V 1 1-3x AA
(2x AA ideal),
1x Li-ion
63-83%

1000 mA
constant current

5 17 mm Recent buyers have reported problems with this driver. Buyer beware.

Boost driver, possibly Seiko S-8352D boost chip. Uses PIC12F629 microcontroller chip for modes, probably with an AMC7136 (sic) linear regulator (datasheet, PDF 954 KB) for dropping small excess voltage as well. 5 modes: High (1,000 mA), mid (350 mA), low (50 mA), strobe (1,000 mA), SOS (1,000 mA). Testing here and here shows that above 2.4 V input the output current is surprisingly regulated. Average efficiency 70%.

Last updated 23 Apr 2012.

nFlex

nflex

TaskLED

$30.00 + shipping
(sold out and/or discontinued)

Buck driver

4.0-30 V 1   85%

1000 mA
constant current

8 28 mm x 20.3 mm Buck regulator. Constant current out 1000 mA (user reconfigurable, 350 mA default) at up to 25 V, uController UI.

Last updated 10 Jun 2011.

P7 or MC-E driver, 3 mode

S009721

KaiDomain

$7.99
(sold out and/or discontinued)

Buck driver

5.5-12 V 1    

3000 mA

3 19 mm 3 modes; low (10%), medium (50%), high (100%).

Formerly product ID 10973.

Last updated 21 Nov 2011.

PowerLine Constant Current Power Supply,
6 versions 350 mA - 2.8 A

Led-Tech

$21.00 (approx)
€14.90 (actual) + shipping

Linear regulator

7.0-30 V
(actual permitted V over total LED Vf varies)
1-8   46-96%

2800 mA
constant current

1 63 mm x 21 mm x 33 mm Linear regulator with a heatsink, available in six versions providing 350 mA, 700 mA, 1000 mA, 1.4 A, 2.0 A and 2.8 A. Large input voltage range (the minimum input voltage of 1 V is assumed) but input voltage must be at least 1 volt above output voltage and a maximum of 22, 13, 9, 7, 6 or 4 V above output voltage for the respective versions. The mention of PWM is believed to mean this driver can be used with a separate PWM driver, not that this driver uses PWM. Has thermal protection and output short circuit protection.
 
Also available in SLIM versions which lack the heatsink and so have tighter input voltage tolerances.

Last updated 16 Mar 2012.

PowerLine SLIM Constant Current Power Supply,
8 versions 180 mA - 2.8 A

Led-Tech

$18.00 (approx)
€12.90 (actual) + shipping

Linear regulator

1.0-30 V
(actual permitted V over total LED Vf varies)
1-8   63-96%

2800 mA
constant current

1 50 mm x 7 mm x 15 mm Linear regulator, available in eight versions providing 180 mA, 350 mA, 500 mA, 700 mA, 1000 mA, 1.4 A, 2.0 A and 2.8 A. Large input voltage range (the minimum input voltage of 1 V is assumed) but input voltage must be at least 1 volt above output voltage and a maximum of 10, 10, 7, 5, 4, 3, 2.5 or 2 V above output voltage for the respective versions. The mention of PWM is believed to mean this driver can be used with a separate PWM driver, not that this driver uses PWM. Has thermal protection and output short circuit protection.
 
Also available in non-SLIM versions which have a heatsink, allowing better heat dissipation and wider input voltage tolerance.

Last updated 16 Mar 2012.

PowerPuck

02008b...

LED Supply

$17.99 + shipping

Buck driver

5.0-32 V 1-6   86-95%

1000 mA
constant current

1 38 mm diameter (flanges 64 mm long) x 13 mm height Input voltage must be at least 2 V higher than output voltage. Output has short circuit protection (15 seconds) and open circuit protection. Versions available with outputs of 350, 700 or 1,000 mA.

Last updated 16 Mar 2012.

PS-SP12118, 5V 3A DC-DC Converter Board

1139

Sure Electronics

$5.99 + shipping

Step-down (non-buck) driver

5.0-24 V 0 12 V automotive  

3000 mA

1 83 mm x 51 mm x 16 mm This is a DC-DC converter using an LM2596 with a constant 5 V output, not a current controlled LED driver. The maximum output current is 3 A.

Last updated 10 Jun 2011.

PT4115 MR16 driver

1258102

FastTech

$2.31

MR16 (buck) driver

12-24 V DC; also works with AC 3 12 V, 24 V DC; 12 V AC  

767 mA

Can be modified to 1200 mA

1 17 mm x 14 mm x 10 mm Photos show PT4115 chip with SS24 Schottky diodes (including the rectifier). Sense resistors appear to be 1 Ω and 0.15 Ω in parallel.

Last updated 17 Mar 2015.

QuadPuck

04016

LED Supply

$159.99 + shipping

Buck driver

8.0-32 V 1-72    

1100 mA
constant current

1 110 mm x 64 mm x 25 (or 17) mm Four channel driver (using four BuckPucks) with independent dimming (140-1100 mA) on each channel (thus up to 4400 mA total). Dimming controller (eg, PC) sold separately. PCB length 102 mm but two connectors hang over the end.

Last updated 10 Jun 2011.

RGB WiFi LED strip dimmer

322818

DealExtreme

$33.63

Buck driver

N/A 1-6 12 V or 24 V DC  

9 A

15 96 mm x 57 mm x 25 mm Three channel, maximum 3 A per channel. WiFi controllable using a cellphone.

Last updated 17 Mar 2015.

RH-808, RGB controller and LEDs

138449

DealExtreme

$17.30

Step-down (non-buck) driver

12-14.5 V 1-4

4 LEDs included

12 V automotive  

125 mA

4 27 mm x 27 mm x 30 mm Unknown regulation method. Output power 1.5 W; output current listed in this table is assumed total. Stated dimensions are probably for each LED housing.

4 white LEDs included (in 4 water resistant housings).

Last updated 17 Mar 2015.

RH-809, RGB controller and LEDs

137609

DealExtreme

$18.30

Step-down (non-buck) driver

12-14.5 V 9

36 LEDs included

12 V automotive  

125 mA

15 115 mm x 14 mm x 12 mm RGB controller; regulation unknown, could be simple resistors. Output power 1.5 W; output current listed in this table is assumed total. Includes RF remote control.

12 red LEDs, 12 green LEDs, 12 blue LEDs included (in 4 water resistant housings).

Last updated 17 Mar 2015.

SD12-1A, 1 A buck driver

S008847

KaiDomain

$2.99
(down from $3.38)

Buck driver

3.0-12 V 1    

1000 mA

1 17 mm The driver chip shown in the photo is the discontinued PT4105.

Formerly product ID 9910.

Last updated 6 Mar 2013.

Seoul P7 3-mode UI Driver board

464

e-lectronics.net

$12.25 + shipping
(sold out and/or discontinued)

Buck driver

5.5-12 V 1 2x Li-ion 76-83%

3000 mA

3 17 mm double sided board Driver has vanished from site.

Buck driver using PWM for modes. Three modes; low (5%), medium (35%) and high (100%), includes mode memory. Not constant current (the output changes with input voltage) but is claimed to push a SSC P7 "very hard" and thus needs good heatsinking. Thermal protection may have been removed in the latest version.

Appears to be the same as KD sku S005296.

Last updated 16 Apr 2012.

Seoul P7 5-mode UI Driver board

460

e-lectronics.net

$5.99 + shipping

Buck driver

3.2-4.5 V 1 1x Li-ion  

2380 mA

5 17 mm Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.

Buck driver using PWM for modes. Modes are high (100%), medium (45%), low (10%), strobe, SOS. Includes mode memory. The claimed output appears very unregulated, with a fresh Li-ion giving 2.38 A, and dropping to just 1.1 A.

Last updated 10 Jun 2011.

Shark Buck

1244

Sandwich Shoppe

$27.00 + shipping

Buck driver

5.0-15 V 1-3   75-79%

3000 mA
constant current

1 19 mm Three versions available (different set resistors), with output current set to 1 A, 2 A and 3 A. For some strange reason complete specifications are not readily available but some more information is available in this thread, where Wayne says you can drive "maybe 4" LEDs. (I can't see any explanation why the efficiency graph shows values 2% higher than the table.)

Last updated 16 Mar 2012.

SOB

1003

Sandwich Shoppe

$18.00 - $20.00 + shipping

Buck driver

3.0-16 V 1   75-85%

1000 mA
constant current

1 14 mm Buck regulator. Constant current output, board available as a "blank" (add one or two SMT set resistors), or preset to 400 mA, 500 mA, 750 mA, 917 mA, or 1000 mA. DD when Vin less than Vf. Has thermal protection.

Last updated 6 Mar 2013.

SP9301, 3*1W RGB LED Driver

LX524X

Focalprice

$5.92

MR16 (buck) driver

12-12 V 1   75%

300 mA

1 30 mm x 20 mm x 13 mm Output voltage 3.0-3.6 V. Output current stated to be 300/600 mA.

This is a strange one. An MR16 driver with three wires (red=positive, white=negative, black=???) is pictured as well as a driver board with empty spaces for red, green and blue LEDs. It is stated to be compatible with MR16 bulbs but apparently requires 12 V DC input. My best guess is that the MR16 driver is a constant voltage supply for a linear regulator RGB driver (AMC7135 with PWM?).

Last updated 17 Mar 2015.

SSC P7/Cree MC-E Buck Converter

CPF member

$35.00 (approx)
€25 (actual) + shipping

Buck driver

4.2-20 V 1    

2800 mA

6 25 mm x 11 mm high Available directly from a CPF member. There is a single mode version (€20), a 4-mode version (100%, 70%, 25%, 3%) and a 6 mode version (as 4 mode plus Fade in/out, Strobe). External momentary switch needed to change modes, not included. Sadly the specs are not all in one place, but it appears it may be able to cope with more than one LED, has a mode memory, and has a typical efficiency of about 85%.

Last updated 10 Jun 2011.

SST-50 5 mode

S009442

KaiDomain

$10.12

Buck driver

5.0-12 V 1   59%

3280 mA

1 23 mm - two boards in double layer 5 modes; high, medium (~50%), low (~5%), strobe, SOS. Comes with a warning about the heat. One poster points out it looks very much like KD sku.S007542. Another poster's test results are the source of the mode output percentages, and has maximum output just 3.28 A instead of the claimed 5 A. That poster may also have been saying he could only get 3 seconds on high mode before thermal protection cut in. Buyer beware. Some efficiency test results are posted here (with a 4.93 A output current).

Formerly product ID 10653.

Last updated 2 Jul 2012.

SST-90 9A, 5 mode

S010140

KaiDomain

$23.25

Buck driver

6.0-12 V 1    

9 A

5 26 mm 5 modes; high, medium, low, strobe, SOS. Output current claimed to be a maximum of 9 A, implying either it's not well regulated or there's a bit of variability between drivers.

Formerly product ID 11409.

Last updated 21 Nov 2011.

SST90 9A, 3 mode

S010139

KaiDomain

$23.25

Buck driver

6.0-12 V 1    

9 A

3 37 mm 3 modes; high, middle, low - no flashing modes! Output current claimed to be a maximum of 9 A, implying either it's not well regulated or there's a bit of variability between drivers.

Formerly product ID 11408.

Last updated 2 Jul 2012.

SZXDY03

223020

DealExtreme

$6.40

Buck driver

12-16 V 1-3    

2200 mA

5 25 mm x 25 mm x 11 mm 5 mode; high, medium, low, fast strobe, SOS. Square board.

Last updated 17 Mar 2015.

TR-001 buck driver

1127400

FastTech

$5.44

Buck driver

6.0-8.4 V 1 2x Li-ion  

2200 mA
constant current

1 17 mm Buck driver, not a linear regulator as claimed. 5 mode; high, medium, low, strobe, SOS. Test data shows steady 2.2 A, not the claimed 2.4 A. However, the test data is rather dodgy - if tested even with a low Vf LED like an XM-L the driver would be up to 168% efficient - buyer beware. It seems like a pretty good driver but the current drawn will be considerably higher than indicated.

Last updated 17 Mar 2015.

TR-0021B
(3-18 V, 5 W driver for Cree)

530011

Lights Castle

$3.73

Buck driver

3.6-16 V 1-4   80-95%

1250 mA
constant current

Can be modified to 2500 mA

1 17 mm The same driver as DX 26110 (even uses the same photos) but this one is more expensive.

Last updated 6 Feb 2016.

TR-0021B
(3-18 V, 5 W driver for Cree)

26110

DealExtreme

$2.48
(up from $2.39
down from $2.60
up from $1.99)

Buck driver

3.6-16 V 1-4   80-95%

1250 mA
constant current

Can be modified to 2500 mA

1 17 mm April 2015: Also available from Lights Castle 530011 for a little more.

April 2011: AX2002 driver chip used again (which has a minimum input voltage of 3.6V in its specs), with SS34 Schottky diode and 0.2 ohm sense resistor. (Add 1 ohm resistor in parallel to increase output to 1.5 A.) The input capacitor is said to be only rated for 16 V. Red board. Or green board (my very next order just after getting a red board). See AX2002 footnotes for using as a voltage regulator.

November 2010: This driver may have changed again, with the YB1682 voltage regulator chip being used. Not good.

Previous version (Feb 2010): Regulator chip AX2002 with 0.2 ohm sense resistor gives output 1.25 A, and the SS34 Schottky diode is great if you want to bump up the output current. DX's description claims it provides different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT. Tests with the previous version showed a constant 1.10 A, which was very close to the theoretical 1.13 A of an AX2002 with the then 0.22 ohm set resistor. When multiple drivers are used in parallel the efficiency apparently drops, probably because one driver is doing most of the work (and so gets quite hot). Hence, these drivers should probably not be run in parallel.

Every so often the regulator chip changes, and in the case of the AX2002 had its identifying marks removed. This is quite frankly silly, as DX's customers went through another round of not only figuring out what the specs for the board were, but working out what the new chip was as well, before they could figure out the board's specs. The driver chip was suspected by some to be MC34063A (not an obvious choice by any means as the chip isn't pushed as an LED driver and the claimed similarity to a certain reference design doesn't exist), YB1682 (has a different reference design - not surprising because it's a voltage regulator not a constant current driver), PT4105 (unlikely because production of that chip was terminated before this board was listed), PT4115 (unlikely because of reported working voltage range) or AX2002 (perhaps most likely; the board appears to be the reference design except for choice of some components, and my chip has part of an A still showing).

Tip 1: The output current can be increased (or decreased) by changing the set resistor appropriately: I(LED)=0.25V/Rsense. The diode in the product pic is a Schottky SS24, which has a maximum current limit of 2 A, but as of Feb 2010 are shipped with a Schottky SS34, with a 3 A limit. The AX2002 driver chip has a 2.5 A limit and gets very hot over 2 A.

Tip 2: Maximum efficiency is achieved when running multiple LEDs from one driver with just a few excess volts (eg, 4 LEDs with 5 Li-ion).

Last updated 8 Nov 2017.

TR-0022b, 3-mode no memory

25517

DealExtreme

$2.75
(backordered)

Buck driver

3.0-12 V
(3-8.4 V claimed)
1 1-2x Li-ion 80-88%

1100 mA

3 17 mm - two boards in double layer Buyer beware. Unknown regulation method, assumed to be buck because of input voltage range, which is listed as two different ranges in the title and description. Conflicting specs. Driver chip is marked LEDA 0712 (Vsense probably 0.25 V), with Schottky diode SS34. Three modes (presumably using PWM); claimed high 800±50 mA but tested to be 1100 mA, low 200±20 mA, fast strobe claimed 400±50 mA. Output current may vary by battery voltage. Efficiency improves from 80% to 88% if sense resistor is changed to lower the output current.

Although specified for use up to 8.4V it apparently works with 12 V with 2 LEDs (simulated) and the efficiency can be increased to 90% at 1 A output with a mod.

Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT. Also claimed 0.8 A output. Buyer beware. Apparent alternate source is Lights Castle 530005.

Last updated 11 Apr 2015.

TR-0022b, 3-mode no memory

530005

Lights Castle

$3.94

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1100 mA

3 17 mm Buyer beware. Photos are of a 2x AMC7135 driver but specs do not match. Specs are also inconsistent, with a claim of different currents for different luminous flux bins. Input voltage claimed to be 3.0-8.4 V and 5-12 V. Output current claims of 0.8 A, 1 A, and 1.2 A. Probably the same as DX 25517 which is a double layer driver.

Last updated 6 Feb 2016.

TR-0022b, 5-mode no memory

26107

DealExtreme

$3.23
(up from $2.85)

Buck driver

3.0-8.4 V 1 1-2x Li-ion 80%

1200 mA

5 17 mm April 2015. Photos have been changed - buyer beware. No longer two boards in double layer.

Purchasers in April 2010 reported receiving a 3 mode board (compare with DX sku.26111) - buyer beware.

Unknown regulation method, assumed to be buck because of input voltage range. 5 modes (presumably using PWM), high 1200±100 mA, mid 550±50 mA, low 100±10 mA, fast strobe 650±50 mA, SOS 1200±100 mA.
 
Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT. Alternative source Lights Castle 530008.

Last updated 23 Jun 2015.

TR-0022b-like,
3-mode with memory

530012

Lights Castle

$4.98

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1200 mA

3 17 mm x 6 mm high - two boards in double layer Buyer beware - specs claim different output current for different luminous flux bins. 3 mode with memory; high, low (100 mA), fast strobe. Apparently the same as DX 26111.

Last updated 6 Feb 2016.

TR-0022b-like,
3-mode with memory

26111

DealExtreme

$3.36
(up from $2.94)

Buck driver

3.0-8.4 V 1 1-2x Li-ion 72-90%

1200 mA

3 17 mm - two boards in double layer A board purchased in March 2010 reported to be 5 mode and with a maximum output current 800-950 mA (compare with DX sku.26107) - buyer beware.

Unknown regulation method, assumed to be buck because of input voltage range. Driver chip is marked LEDA 0712. Three modes with memory; claimed high 1,200±100 mA, low 100±10 mA (bad flickering reported from very low speed PWM), fast strobe 650±50 mA. One reviewer mentioned the mode order is a crazy low, strobe, high. Output current may vary by battery voltage.

Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT. Apparently the same as Lights Castle 530012.

Last updated 11 Apr 2015.

TR-0022b-like,
5-mode with memory

530009

Lights Castle

$5.57

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1100 mA

5 17 mm x 6 mm high - two boards in double layer Buyer beware - claims different output currents with different luminous flux bins. 5 mode with memory; high, medium (550 mA), low (100 mA), fast strobe, SOS. Alternative source DX 26108.

Last updated 6 Feb 2016.

TR-0022b-like,
5-mode with memory

26108

DealExtreme

$2.99

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1200 mA

5 17 mm - two boards in double layer Update June 2012: There may be a bad batch of these. They are reported here to eat LEDs.

Unknown regulation method, assumed to be buck because of input voltage range. Spec claims 5 modes (presumably using PWM), with memory; claimed high 1200±100 mA, mid 550±50 mA, low 100±10 mA, fast strobe 650±50 mA, SOS 1,200±100 mA. However, one user has posted that with 4x AA NiMH the steady modes were high 700 mA, medium 300 mA, low 60 mA (insufficient voltage?).

Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT. Alternative source Lights Castle 530009.

Last updated 11 Apr 2015.

TR-0022b-like,
5-mode without memory

530008

Lights Castle

$4.47

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1100 mA

5 17 mm x 6 mm high - two boards in double layer Buyer beware - claims different output currents for different luminous flux bins. 5 mode, no memory; high, medium (550 mA), low (100 mA), fast strobe, SOS. Alternative source DX 26107.

Last updated 6 Feb 2016.

TR-0124 or TR-0163B, 5 mode SST-90 driver

1424817

FastTech

$8.46

Buck driver

12-12 V 1    

5100 mA

5 32 mm x 28 mm high - 2 perpendicular boards Buyer beware - title says TR-0124, photo shows TR-0163B. 5 modes; high, medium (2 A), low (800 mA), strobe, SOS. Polarity protection. Alternative sources DX 50026 and Lights Castle 530014.

Last updated 11 Apr 2015.

TR-0124 or TR-0163b,
SST-90 driver

530014

Lights Castle

$10.20

Buck driver

12-12 V 1    

6500 mA

5 35 mm x 35 mm x 25 mm Buyer beware - model number in photo different from model number in specs. Unknown input voltage range. 5 mode; high, medium (2 A), low (0.8 A), fast strobe, SOS. Alternative source DX 50026 and Fasttech 1424817.

Last updated 6 Feb 2016.

TR-0124B, 5 mode driver for Luminus SST-50

1404708

FastTech

$6.43

Buck driver

7.2-8.4 V 1 2x Li-ion  

4000 mA

1 26 mm x 26 mm high - two perpendicular boards Five modes, unknown memory; high (4 A), medium (2 A), low (0.8 A), strobe, SOS. Claimed to be 10 W input power but 4 A output current - not true with a white LED.

Last updated 17 Mar 2015.

TR-0142B or TR-001PB,
SST-50 driver

530013

Lights Castle

$8.19

Buck driver

6.0-8.4 V 1 2x Li-ion  

4000 mA

5 26 mm x 22 mm x 21 mm Buyer beware - model number in photo different from model number in specs. Minimum input voltage is a guess. 5 mode; high, medium (2 A), low (0.8 A), fast strobe, SOS.

Last updated 6 Feb 2016.

TR-0163B (SST-90 driver)
5 mode with memory

50026

DealExtreme

$9.76
(up from $9.60,
up from $8.90)

Buck driver

3.6-12 V 1   70%

6500 mA

5 35 mm diameter x 22 mm high - two boards in double layer 5 mode with memory; high 6.5 A, medium 2 A, low 800 mA, fast strobe 5 A, SOS 6.5 A. Efficiency figure from review. Driver appearance has completely changed but model mentioned in specs has not changed. (Update April 2015: It now has.) Buyer beware. Alternative sources Fasttech 1424817 and Lights Castle 530014

Version 2: TR-0163B. Two green boards perpendicular to each other. Unknown if size has changed.

Version 1: TR-0124-A. Double layer, red boards.

Last updated 11 Apr 2015.

TR-0166, 1A buck

237006

DealExtreme

$4.20

Buck driver

3.0-8.4 V 1 1-2x Li-ion  

1000 mA

3 17 mm 3 mode with memory; high, low, strobe (8 Hz). Polarity protected.

Last updated 17 Mar 2015.

TR-0192 (5~12 V, 9 W driver for 3x Cree), 3-mode

530004

Lights Castle

$5.04

Buck driver

5.0-12 V 1-3    

800 mA

3 20 mm x 17 mm high - two perpendicular boards Buck driver - buyer beware on the specs and vertical size. 3 modes; high, low (200 mA), fast strobe. See DX 25516 for more details.

Last updated 6 Feb 2016.

TR-0192, 3 mode
(formerly TR-0037)

25516

DealExtreme

$3.65
(down from $3.73,
down from $4.27,
up from $3.54)

Buck driver

3.0-10.5 V
(5-12 V claimed, but might be dangerous for driver & LEDs)
3 4-7x NiMH
2x Li-ion
83-91%

800 mA
constant current

3 20 mm x 17 mm high - two perpendicular boards Update Jan 2016: It's a buck driver possibly using the QX9920 LED driver chip, not buck/boost as implied by the specs - buyer beware. Battery contact board is labelled TR-0192A and perpendicular board is labelled TR-0192B.

The specs given for this driver imply that it'll output 10.8 V with anything from 5 V to 12 V input. This seems very doubtful at this price point - it would mean it was boost/buck. It's very likely boost only, and goes direct drive when the input voltage is greater than the output voltage; the output current is said to rise rapidly and it gets very hot. Alternative source Lights Castle 530004.

Updated version May 2013: About 20 mm high; two perpendicular boards. Upgraded switching FETs and much larger inductor.

Old version: 14 mm high; two boards in double layer. Uses the FP5138 boost driver chip. 3 modes - claimed high 800±50 mA, low 200±20 mA, fast strobe 400±40 mA. However one reviewer has claimed the modes are high 900 mA, low 600 mA, strobe 600 mA, and another says they are now 750 mA on high (as of 12/2009). Mode memory switches to the next mode whenever turned on again. Apparently has a battery protection function which disables high mode when battery cannot supply enough current. Input current may be as high as 4 A at 5 V. The efficiency figure listed in this table is from a particular configuration in the driver chip datasheet. YMMV.

Tip: The driver board is the top board (17 mm diameter, with the inductor on it) and can be separated from the lower board if only one mode is wanted. It has set resistors on its underside which can individually be changed to alter high and low modes.

Last updated 15 Mar 2016.

TR0142B (SST-50 driver)
5-mode with memory

50025

DealExtreme

$7.40
(up from $6.90):

Buck driver

8.4-8.4 V 1 2x Li-ion  

4000 mA

5 26 mm diameter x 22 mm high - two boards in double layer 5 modes with memory; high 4 A, medium 2 A, low 800 mA, fast strobe 2.8 A, SOS 4 A. Incomplete specs for input voltage.

Last updated 22 Aug 2013.

V10

846

LCK-LED

$6.00 + shipping

Linear regulator

3.2-4.5 V 1    

3500 mA

5 17 mm Driver uses at least four AMC7135 chips on one of two back-to-back boards, and probably an ATtiny13 on the other board. Five modes - high (100%), medium (45%), low (10%), strobe, SOS. Claimed constant current, but the maximum output is variously listed as 3.0 A and 3.5 A, and test results listed show the output is definitely not constant over the voltage range tested (and has a high of 3.3 A). This calls into doubt the constant current claim for all drivers from this retailer. Buyer beware. See extra AMC7135 notes below.

Last updated 10 Jun 2011.

Wonder-cuits

13

litemania.org

$8.00 + shipping
(sold out and/or discontinued)

Buck driver

3.3-6.0 V 1 1x Li-ion  

2000 mA

1 17 mm The whole site this driver was on has gone.

Discussion here claims it does no current limiting other than PWM. Output current can be adjusted to one of 500 mA, 1 A, 1.5 A, 2 A by soldering/unsoldering four parallel set resistors. Specs claim it is "Most efficient when the LED's Vf is similiar to Input Voltage." I wonder who came up with the weirdo name.

Last updated 16 Apr 2012.

WY5412

162780

DealExtreme

$4.10 for 2

Step-down (non-buck) driver

2.7-4.2 V 1 1x Li-ion  

1200 mA

1 16 mm Five modes, cycling; high, medium (30%), low (5%), fast strobe (8 Hz), SOS. Probably not suitable for torch use due to non-standard supply contacts on back of board. Diameter stated to be 16.5 mm but dimension listed is 16.0 mm. Unknown regulation method.

Last updated 17 Mar 2015.

WY6825

162784

DealExtreme

$4.40
(sold out and/or discontinued)

Buck driver

3.0-12 V 1    

2500 mA

5 22 mm x 10 mm high Five modes without memory; high, medium (50%), low (10%), fast strobe (8 Hz), SOS. Polarity protection. Unknown PWM frequency, eh!

Last updated 3 Feb 2017.

WY6890 adjustable driver with switch

162781

DealExtreme

$4.10

Linear regulator

2.8-4.5 V 1 3x AAA,
1x Li-ion
 

5 mA

Can be modified to 1000 mA

1 34 mm x 20 mm Output current continuously adjustable from 5 mA to 1000 mA using on-board potentiometer. Unknown regulation method. Switch is momentary, turns driver on or off with each push. Stand-by current 10 µA.

Last updated 17 Mar 2015.

WY6927

162787

DealExtreme

$4.80

Buck driver

5.0-8.4 V 1 2x Li-ion  

2000 mA

3 22 mm 3 mode without memory; high, low (20%), fast strobe (8 Hz). A momentary switch (included) cycles through modes.

Last updated 17 Mar 2015.

WY6927, 3 mode bike light driver

530030

Lights Castle

$5.56

Buck driver

5.0-8.4 V 1 2x Li-ion  

2000 mA

3 22 mm 3 modes, through which you have to cycle to turn it off; high, low (20%), fast strobe (8 Hz).

Last updated 6 Feb 2016.

XLZM-RGB-V01, RGB driver

245869

DealExtreme

$5.00 for 2

Buck driver

4.5-4.5 V 1    

 

1 30 mm Buyer beware. Apparently intended for RGB (3x1W) LEDs but only the cathode solder pad for the green LED has solder on it. Many important details lacking. Appears to have an IR sensor.

Last updated 17 Mar 2015.

XM-L driver

CNQ001480

CN Quality Goods

$7.00 + shipping

Buck driver

6.0-8.4 V 1 2x Li-ion  

2800 mA

1 26 mm 3 mode; high, low, strobe

Last updated 17 Mar 2015.

XM-L driver

CNQ001379

CN Quality Goods

$6.00 + shipping

Step-down (non-buck) driver

2.7-8.4 V 1 1-2x Li-ion  

2800 mA

1 22 mm 3 modes; high, low, strobe. Polarity protection.

Last updated 17 Mar 2015.

XM-L Multi-cell Circuit Board

p-361

Intl Outdoor Store

$9.95
(sold out and/or discontinued)

Buck driver

5.5-12.6 V 1-3 2-3x Li-ion  

3000 mA
constant current

3 21 mm x 15 mm high Driver removed from site.

Three modes; high, medium (30%), low (5%). PWM rate 3.9 kHz. Thermal protection, low voltage protection; flashes to indicate both of these.

Last updated 18 Jan 2016.

YCX-04L, 2A 5 mode driver

355969

DealExtreme

$5.41

Buck driver

2.9-8.4 V 1 1-2x Li-ion  

2000 mA

5 17 mm (two boards) 5 mode with memory; high, medium, low, fast strobe, SOS. Low voltage warning, low voltage protection.

Last updated 17 Mar 2015.

Zetex C310 Buck Driver, 8 mode

10421

DealExtreme

$7.35 for two pack
(sold out and/or discontinued)

Buck driver

3.7-8.4 V 1 3-6x NiMH, 1-2x Li-ion  

1000 mA

8 20 mm Buck regulator based on Zetex C310 chip and PWM for modes. Output 800-1000 mA on high. Modes 100%, 50%, 30%, 20%, 10%, SOS, strobe, fade in & out (one of very few to have that). With 4x NiMH cells the ability to select modes is lost about when the cells need to be recharged. No reverse polarity protection.

Last updated 10 Jun 2011.

µBuck

103

PCB Components

$19.00 (approx)
€13.95 (actual)

Buck driver

6.0-30 V 1-4   95%

1000 mA
constant current

1 14 mm x 11 mm x 6 mm Maximum output power ~15 W. Polarity protection. Dimming by PWM signal or DC. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown.

Last updated 17 Mar 2015.

µBuck

103

PCB Components

$19.00 (approx)
€13.95 (actual)

Buck driver

6.0-30 V 1-6   95%

700 mA
constant current

Can be modified to 1000 mA

1 14 mm x 11 mm x 6 mm Maximum output power ~15 W. Polarity protection. Dimming by PWM signal or DC. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown.

Last updated 17 Mar 2015.

µBuck

103

PCB Components

$19.00 (approx)
€13.95 (actual)

Buck driver

6.0-30 V 1-9   95%

350 mA
constant current

Can be modified to 1000 mA

1 14 mm x 11 mm x 6 mm Maximum output power ~15 W. Polarity protection. Dimming by PWM or DC inputs. Maximum claimed efficiency listed here; typical efficiency for any particular configuration unknown.

Last updated 17 Mar 2015.

Notes

Footnotes & Instructions

  • Video Foundry/Aqualab does not sell any of these drivers. Links are provided to resellers.
  • Use the pop-up menus, check boxes, etc, in the second row of the table to filter the results.
  • Click on the links in the titles in the top row of the table to order the results by that information.
  • Results of searches can be bookmarked because all the search parameters are contained in the URL. (You can delete the parameters you don't want - for example, http://www.videofoundry.co.nz/ianman/laboratory/research/driverlist.php?sku=26110 brings up just that driver.)
  • All prices in US$ (except where dual prices are listed in US$ and € for some European retailers).
  • All driver boards from DealExtreme and KaiDomain include shipping.
  • Information is unfortunately not guaranteed to be correct. any updates, corrections, omissions, etc.
  • However, please don't bother sending me an email to tell me about your company's LED products. It will be treated as spam. I really don't like spam, and SpamCop is busy enough as it is without having to process your email as well. Putting "Re" in the front of your spam's subject does not make it any less likely your spam will be sent to SpamCop.
  • Recommended drivers highlighted in green. They have a good combination of price, features and efficiency.
  • Drivers no longer available (sold out or backordered) are highlighted in grey.
  • Recommended drivers no longer available are highlighted in a darker green.
  • Drivers listed at those resellers as "Backordered" etc for more than a month are deemed to be discontinued (although I'm happy to later be proven wrong).
  • Don't connect drivers that have capacitors across their outputs to LEDs while the driver is powered. An explanation (on CPF) why not.
  • No mains driver will be completely waterproof. Those that are water resistant mostly have an IP rating (eg, IP67).

Notes on AMC7135 linear regulator (click to expand/contract)

The AMC7135 (datasheet) is a linear regulator, which means it acts like a variable resistor changing its value to try to keep the current constant. Like a resistor, any dropped voltage is burnt off as heat. Boards include a polarity protection diode and can easily be PWM-driven for lower modes.

Vin must be at least 0.12 V above Vf of LED to stay in regulation, although they drop out of regulation quite gracefully, not suddenly. The graph in the AMC7135 datasheet (Jan 2006) has the 0.1 and 1 volt vertical lines missing. Each AMC7135 provides constant current, about 1/3 amp (actually 300-380 mA depending on particular version; I've generally assumed 330-335 mA for above listings). Boards come with one to eight AMC7135s, and single mode up to 20 mode. Boards can be paralleled to give greater output, or connected with one multimode board controller providing the modes for several boards.

The AMC7135 is very efficient when input voltage is close to output voltage but not particularly good when input voltage is significantly higher. Average efficiency for 3x NiMH or 1x Li-ion can be well over 90% with an LED with the right Vf. Test results and discussion for 3 and 4 chip boards.

Since the AMC7135 just burns off excess input volts as heat, the more volts fed into them the hotter they'll get. One guy claimed that his got so hot they slid right off the board (ie, >183-190 °C melting range of 60/40 solder). The AMC7135 has built-in thermal protection (which will cause dropouts or a flickering effect if it gets too hot) but the multi-mode control chips used on the multi-mode boards are much less rugged. (And here.) If using with an input voltage above 4.5 V or so you can expect them to get hot!

To get multiple modes typical microcontrollers used are the Atmel ATtiny13 (or 13A or 13V) and the Microchip PIC12F629. These both have a 5.5 V maximum, while the AMC7135 linear regulator has a 6.0 V maximum. This means that multimode drivers will have a slighty lower maximum voltage than single mode boards.

Tip 1: To get reliable operation at low voltages, especially with only one AMC7135 chip being used, you may need to short out (and maybe remove) the polarity protection diode(s)*. This is because the AMC7135 in series with a polarity protection diode needs a minimum 2.7 V + 0.6 V (silicon diode) = 3.3 V to stay in regulation. The Vf of LEDs at 330-350 mA can easily be quite a bit lower than 3.3 V so will not be running in regulation. Note that if a germanium or Schottky diode was used the drop could be as low as 0.3 V instead of 0.6 V.

* However, I found with one multimode board this caused the board to go unstable (don't know exactly why) but I found that inserting a small value resistor instead of the diode was enough to get the driver stable again. Because the drive current through that point in the circuit is so low (6 mA for mine) there's very little voltage drop across the resistor - much less than across the diode - so it still serves the purpose of saving ~0.6 V.

Tip 2: If the input voltage is too high you may be able to use another LED in series with the board to drop the voltage - it beats burning it all off as heat. (The set current is <1 mA for single mode boards so both LEDs will get practically identical current. Diagrams and much discussion of use with multiple Seoul P7s and multi-mode boards.) More than one extra LED appears to be not a good idea for use with the lower modes of multi-mode boards since the Vf of the extra LEDs decreases too much at the low current to protect the driver from the battery voltage. (Many of the multi-mode boards have a capacitor on the output.) Flashing modes appear unsuited to this technique.

AMC7135-based driver options are discussed here, or an inexpensive multimode AMC7135 driver here.

Notes on PT4105 and alternative driver chips (PT4115, AX2002, CL6807) (click to expand/contract)

PT4105 (datasheet):

Production of this driver IC - as used in the Kennan and MR16 base drivers described above - has been terminated. The manufacturer doesn't even have a publicly displayed link to the datasheet any more, which is the weirdest part of it. This from Micro Bridge (now removed from their site; try to ignore the punctuation and spacing):

The PT4105 which the manufacture has already officially stopped producing,and the subsequent instead item is the PT4115,AX2002 and FP6101 Also,The PT4115,AX2002 and FP6101 has superior performance over ,wider input range and more current than the PT4105.

PT4115 (datasheet):

While I look forward to the PT4115 being available in low cost LED drivers (by its numbering the apparent successor to the PT4105), I note that it needs an input of at least 8 V (and has under voltage lock out at 6.8 V), so isn't nearly as well suited to low voltage torches as the PT4105 was. It will, however, have its uses for 3x Li-ion torches and automotive purposes. The chip has a DIM pin which gives it the ability to very easily be dimmed. Efficiency is about 80-82% for 1 LED, up to 93% for 3 LEDs, and apparently up to 98% for 7 LEDs. Maximum output current 1.2 A.

AX2002 (datasheet):

This driver chip from AXElite looks extremely interesting. It will accept a minimum 3.6 V input and has a maximum switched current of 2.5 A, although it tends to overheat at more than 2 A. It includes thermal protection (140°C), over current protection, short circuit protection, and has a PWM control circuit. Its efficiency is good too, with an output of 2 A @ 5 V it's an impressive 91% efficient (with 12 V input). Driving a Cree XR-E at 1 amp will give an efficiency of about 87-88% (with 12 V input). Efficiency is not quite as good at low currents with a single LED, dropping under 80%.

AX2002 drivers can also easily be configured as a constant voltage power supply. The load is connected straight to ground and the 0.25 V reference voltage is used to control a voltage divider with a couple of moderately high value resistors to give a fixed multiple of 0.25V at VOUT.

For example, for 5 V, 5 = 20 * 0.25, so a 10 kΩ resistor is placed between ground and FB (the feedback pin), and a 190 kΩ resistor between FB and VOUT (making the total of those resistors between VOUT and ground of 200 kΩ).

When used in this way, to give stability the current through the resistors probably just needs to be comfortably greater than the feedback pin bias current of (0.1 µA typical, 0.5 µA maximum). If two exact resistor values for the voltage divider are not available it's easiest to use a single resistor for the sense resistor (between ground and FB), while the other value (between FB and VOUT) uses two resistors in series or parallel. For series, one of those two resistors will be as close as possible to the desired value, and just under it, while the other will be a much smaller resistor to tweak the total resistance up for the output voltage wanted. For parallel, the main resistor is just over the actual value wanted while the other resistor with about ten times the resistance tweaks the total resistance down. If that resistor is getting into megaohms you should probably revise your values.

Some AX2002 drivers (such as DX 3256 sadly no longer an AX2002 driver) come with a 1 A Schottky diode, which will need to be changed if increasing the output current over 1 A. See the Schottky diode notes below for links.

AX2003 (datasheet):

The AX2002 also has a big brother, the AX2003, which has a maximum switched current specification of 4 amps – easily enough to drive a Seoul P7, or a Cree MC-E with the dice in parallel. No drivers with the AX2003 are presently known. The spec sheets of the AX chips could do with a few more graphs showing how constant the output current is, etc.

FP6101 (datasheet): Not an LED driver.

CL6807 (datasheet):

Chinese LED driver, 1 A maximum output current, 6-35 V input, 0.1 V high side sense voltage. Claims to be able to provide up to 35 W output power. Dimmable with 0.5-2.5 V PWM signal.

So there are some nice driver chip options, but it still leaves a gap of a high efficiency, really low voltage, low current driver.

Notes on Schottky diodes (click to expand/contract)

Schottky diodes are diodes that have a low voltage drop across them. 0.3 V is a typical figure, compared to around 0.60-0.65 V for a typical silicon diode. This makes Schottky diodes good for rectifiers and LED drivers where high efficiency is required. Drivers that use the AX2002 such as DX 3256 can easily be modified for higher output current but the Schottky diode needs to be replaced if the output current is to exceed 1 A.

Inexpensive Schottky diodes are available from these sources:



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