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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 22 August 2014
Footnotes 2 April 2014

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 two spammer's addresses: spammer address 1, spammer address 2. They deserve a taste of their own spam.

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

61 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
AC

Driver can power

LEDs incl with driver

    mod. current
from
to

const. current

from
to
 

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 6 Nov 2012.

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 6 Nov 2012.

1A buck/boost driver

p-674

Int'l Outdoor Shop

$9.97

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

Last updated 29 Jan 2013.

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.

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 14 Mar 2014.

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 14 Mar 2014.

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.

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 14 Mar 2014.

3*AMC7135
(GCOOL, code switching)

p-435

Int'l Outdoor Shop

$6.95 + shipping

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 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 20 Nov 2012.

3*AMC7135
(GCOOL, ramping)

p-560

Int'l Outdoor Shop

$6.95

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 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 20 Nov 2012.

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 20 Apr 2014.

3x AMC7135 (Nanjg AK-47A)

127689

DealExtreme

$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 20 Nov 2012.

3x AMC7135 (TR-025,
formerly TR-0050 or TR-0025,
formerly TR-025)

26109

DealExtreme

$2.19

Linear regulator

2.7-6.0 V
(no polarity protection diode - see notes below)
1 3x NiMH,
4xalkaline,
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 6 Nov 2012.

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,
4xalkaline,
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 18 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, 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 18 Nov 2012.

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 14 Mar 2014.

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 14 Mar 2014.

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 14 Mar 2014.

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

127686

DealExtreme

$3.10

Linear regulator

3.0-4.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm 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. Alternatives are DX sku.127689 (ascending mode order with memory). See extra AMC7135 notes below or this CPF thread.

Last updated 20 Nov 2012.

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

p-596

Int'l Outdoor Shop

$2.83
For 1-2: + shipping

Linear regulator

2.9-4.5 V 1 3x NiMH
1x Li-ion
 

1050 mA
constant current

5 20 mm 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 20 Nov 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 26 Apr 2012.

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 16 Mar 2014.

3xAMC7135, 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.

3xAMC7135, 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.

3xAMC7135, 5 mode
(Nanjg AK-47)

6190

DealExtreme

$3.19

Linear regulator

3.0-4.5 V 1 3x NiMH
1x Li-ion
50-97%

1050 mA
constant current

5 17 mm (maybe 15mm - 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 20 Nov 2012.

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 14 Mar 2014.

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 22 Oct 2012.

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

p-254

Int'l Outdoor Shop

$3.50
(up from $2.89)
For 1-2: + shipping

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 20 Nov 2012.

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 14 Mar 2014.

4x AMC7135
(Nanjg 101-AK-A1)

127688

DealExtreme

$4.40

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 20 Nov 2012.

4x AMC7135
(Nanjg 111)

127685

DealExtreme

$3.25
(up from $3.00)

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 5 Mar 2014.

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.

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.

AMC7135 chip

p-221

Int'l Outdoor Shop

$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
4xalkaline
1x Li-ion
50-97%

350 mA
constant current

1 5 mm x 5 mm x 2 mm 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 10 Nov 2013.

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 18 Nov 2012.

AMC7135 chip
380mA

p-666

Int'l Outdoor Shop

$0.49
For 1-4: + shipping

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 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 380 mA. See extra AMC7135 notes below.

Last updated 29 Jan 2013.

AMS1117-3.3 linear regulator chip

293568

DealExtreme

$4.16 for 50

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 14 Mar 2014.

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.

DL-00193

107676

DealExtreme

$3.70

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 2 Jul 2012.

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.

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 16 Apr 2014.

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 16 Apr 2014.

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 9 Jul 2014.

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.

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.

Nanjg112A

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 1xLi-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.

Nanjg28

15880

DealExtreme

$5.35
(formerly $5.50)

Boost driver and linear regulator

0.9-4.5 V 1 1-3x AA
(2x AA ideal),
1xLi-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.

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.

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.

TR-0022b, 3-mode no memory

25517

DealExtreme

$2.75

Buck driver

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

1100 mA

3 17 mm - two boards in double layer 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 80050 mA but tested to be 1100 mA, low 20020 mA, fast strobe claimed 40050 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.

Last updated 16 Mar 2012.

TR-0022b, 5-mode no memory

26107

DealExtreme

$2.85

Buck driver

3.0-8.4 V 1 1-2xLi-ion 80%

1200 mA

5 17 mm - 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 1200100 mA, mid 55050 mA, low 10010 mA, fast strobe 65050 mA, SOS 1200100 mA.

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

Last updated 28 Oct 2012.

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

26111

DealExtreme

$2.94

Buck driver

3.0-8.4 V 1 1-2xLi-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's 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 1,200100 mA, low 10010 mA (bad flickering reported from very low speed PWM), fast strobe 65050 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.

Last updated 10 Jun 2011.

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

26108

DealExtreme

$2.99

Buck driver

3.0-8.4 V 1 1-2xLi-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 1200100 mA, mid 55050 mA, low 10010 mA, fast strobe 65050 mA, SOS 1,200100 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.

Last updated 25 Jun 2012.

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 14 Mar 2014.

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 1 Nov 2012.

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 1 Nov 2012.

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 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) (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 very poor at low currents.

AX2002 drivers can also easily be configured as a constant voltage driver. The load is connected straight to ground and the 0.25 V reference voltage is used 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).

Some AX2002 drivers (such as DX 3256 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.

All that is very well, but it 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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