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 16 December 2019
Footnotes 10 August 2016
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.
Note that some sellers are more reliable than others. Inclusion of particular resellers in this list is not an endorsement of them as businesses. Note that Fasttech closed in December 2022 but the drivers are still included for reference.
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).
Â
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.
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.
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.
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.
Boost driver, 20 modes in three groups. Output voltage and current not constant, 1.0 V in gives ~300 mA out, 1.4 V in gives ~700 mA out. Run on two fresh NiMH it outputs 1.8 A and gets very hot - not advised. I believe this is identical in operation to the AAA driver except for physical size (and the new version of this board is black). "LDCH" on the back of the board is the manufacturer.
Boost boards; output voltage and current not constant. Gets really hot when used with two AA cells. I believe this is identical in operation to the AA driver but is narrower and taller than that one.
19 mm across; roughly half of a round Shark sized board
User interface board for the various Shark drivers - not usable by itself. Available in two flavours - three mode Plain (low, medium, high) and four mode Special (with SOS).
This product has vanished from the retailer's web site.
Multimode boost regulator. Maximum input current 4 A. Available in two flavours - three mode Plain (low, medium, high) and four mode Special (with SOS).
"Great for use in Mag C & D and fixed lighting applications."
980 mA constant current
1
19 mm
Boost regulator. Maximum input current 4 A, said by manufacturer to be still efficient >3 A. Regulates on voltage or current, output current adjustable from 50-980 mA (or greater by changing set resistor, although that would remove load protection) at maximum 32 V. Includes copper heatsink; improved thermal performance and higher output voltage over standard Shark.
Â
I note that Wayne here recommends new buyers to get three.
This product has vanished from the retailer's web site.
Â
Multimode boost regulator. Maximum input current 4 A. Available in two flavours - three mode Plain (low, medium, high) and four mode Special (with SOS).
Transformer with buck regulator. Claimed constant current out 650-700 mA, actual might be as low as 620 mA. Reported to not be very efficient (not normally a major problem for mains power). These are called GU10 drivers but do not themselves have the bayonet pins of the GU10 connector.
Whatever description there used to be has vanished. Enclosed in white box - claimed water and dust resistant. Presumed to be a transformer with buck regulator. Output 350 mA (title says 320 mA) constant current @ 6-12 V according to the label (not 0.5-10 V as claimed in title).
PWM dimming only. This board does no current limiting but can be used in conjunction with other drivers that do. PWM frequency ~800 Hz. Maximum throughput current 3.4-4.5 A depending on temperature.
PWM dimming only. This board does no current limiting but can be used in conjunction with other drivers that do. The number of modes varies and can be altered. This board does no current limiting but can be used in conjunction with other drivers that do. PWM frequency ~800 Hz. Maximum throughput current 6 A (version 1 was 3.4-4.5 A depending on temperature). Reverse polarity and output open circuit protected.
$21.00 (approx) €14.90 (actual) + shipping (sold out and/or discontinued)
User interface driver
7.0-30 V
0
10 A
1
138 mm x 16 mm x 20 mm (or 40 mm with knob)
PWM dimming only. Scroll bar design with a PWM frequency of 450 Hz giving 0-100% control of constant current or voltage supply - ie, needs to be used with a regulator. Short circuit protected.
$63.00 (approx) €44.50 (actual) + shipping (sold out and/or discontinued)
User interface driver
7.0-30 V
0
10 A
1
138 mm x 52 mm x 20 mm (or 40 mm with knob)
PWM dimming only. Scroll bar design with a PWM frequency of 450 Hz giving 0-100% control of constant current or voltage supply - ie, needs to be used with a regulator. Short circuit protected.
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.
Stupidly, this driver completely vanishes from the retailer's web site when temporarily out of stock.
SKU 1060. Buck driver. Unknown driver chip.
5 mode board
Shining Beam
$5.95 + shipping (sold out and/or discontinued)
Boost driver and buck driver
4.0-15 V
1
1000 mA
5
17 mm
This driver has been replaced on the retailer's web site with a 3 mode linear regulator (with the same URL). Plain weird or a typo?
Â
Old details: Claims to be a boost/buck driver, implying it can handle multiple LEDs, but no information is provided about that. 5 modes - high (1000 mA), medium (300 mA), low (100 mA), strobe, SOS. Mode memory.
$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.
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.
Output voltage 12-24 V. IP54 or IP66 dust/water rating (apparently for indoor and outdoor versions, although there's no indication of how they are distinguished when ordering). Alternative versions mentioned on the datasheet have outputs of 700 mA (18-36 V) or 2,080 mA (8-12 V).
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.
This product has been replaced on the retailer's web site with an LED optic. Oh boy. The driver may still be available elsewhere on the site. Update: The LED optic has vanished as well.
Maximum output power 6 W.
A9 Buck Current Regulated 3.0V~8.4V 1.3A Flashlight PCB
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.
Vague specifications given but from the test data given it's apparently PWM dimming only in which case this board does no current limiting but could be used in conjunction with other drivers that do. 5 modes; high, medium (45%), low (10%), strobe, SOS.
There's a user guide for the many modes here but not actual specifications, and its maker on CPF doesn't link to its specs (or the latest firmware version) in his tagline. Go figure.
As with the FLu-PIC, specs aren't given. It does claim to have multiple modes, though: Hi/Burst (450-600 mA), User Set, Low, Off, Brightness Set (for user set level) between 1-10 levels.
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.
$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).
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.
$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.
PWM dimming only. Scroll bar design with a PWM frequency of 450 Hz giving 0-100% control of constant current or voltage supply - ie, needs to be used with a regulator. Short circuit protected.
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The LT-1619 version has IR sensor and remote control.
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.
Previously: This is a good example of what's wrong with KD. There are no specs given other than the product title, and that uses mAh instead of mA. It's just an assumption that it's for 110 V. Assumed suitable for 7 LEDs only.
This is a great example of what is wrong with KD. There are no specs given except in the product title, and that uses mAh instead of mA. PAR38 bulbs are available for both 110 V and 230 V so it's just a guess that this driver is for 110 V.
5 LEDs included (in a fancy aluminium holder) which are reported to be red, green, blue, cool white and warm white; it seems a warm white LED is pictured.
* Unclear if compatible with 110-120 V AC operation; driver label claims universal mains voltage input, description only mentions 220V. Output voltage 3-5 V.
1 white LED included (in a fancy aluminium holder).
Product is labelled "220V". Output current stated on driver is likely an error and should probably be 330 mA. Output voltage 2-5 V @ claimed 310-350 mA.
1 warm white LED included (in a fancy aluminium holder).
Transformer with buck regulator. Called a GU10 driver but does not itself have the bayonet pins of the GU10 connector. Incomplete specifications given. Presumably it can drive 3 LEDs because it's called a "3W" driver.
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.
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).
$70.00 (approx) £33.17 (actual) + shipping (sold out and/or discontinued)
Mains driver
100-264 V AC
1-3
115Â V, 230Â V AC mains power
700 mA constant current
1
120 mm x 35 mm x 25 mm
Driver removed from site.
IP68 dust/water rating; up to 2 m underwater (note that the primary lead is only 1 m long). Overload protection, short-circuit protection, thermal protection.
$116.00 (approx) £55.00 (actual) + shipping (sold out and/or discontinued)
Mains driver
100-264 V AC
1-18
115Â V, 230Â V AC mains power
350 mA constant current
1
155 mm x 38 mm x 24 mm
Driver removed from site.
Dimmable with 1-10 V input (controller available separately). Output in two series of up to 9 LEDs each. Overload protection, short-circuit protection, thermal protection.
$0.00 (approx) £call (actual) + shipping (sold out and/or discontinued)
Mains driver
100-264 V AC
1-16
115Â V, 230Â V AC mains power
700 mA constant current
1
164 mm x 46 mm x 32 mm
Driver removed from site.
Dimmable with 1-10 V input (controller available separately). Output in two series of up to 8 LEDs each. Overload protection, short-circuit protection, thermal protection.
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.
Up to 70 W power switching. Quite a fancy PWM controller (apparently), with RS-232 control, or with potentiometer or two buttons (0-100% stepless), or with a single button (three levels 25%, 50%, 100%, long press turns off).
Up to 50 W power switching. Control with potentiometer or two buttons (0-100% stepless), or with a single button (three levels 25%, 50%, 100%, long press turns off). Selectable dimming frequency.
Two versions: Buttons, with operation using one button (25%, 50%, 100%, long press turns off) or two buttons (0-100% stepless); or Potentiometers (0-100% stepless).
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.
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.
Description claiming "output voltage: less than 1.5V" is just a laugh, as is the "Length: 7.50cm" dimension and the "5pcs a pair" quantity. Unknown minimum input voltage - values given here are just a guess. Buyer beware.
Three modes; high, low, strobe. Incomplete specs given. No inductor present so it's not a buck driver. Input voltage specs indicate it may be just a PWM driver.
Incomplete and/or stupid specifications given. The presence of a transformer implies a mains driver but NO specs are given (except "350mAh" instead of mA in the title). How do they expect to sell them?
Incomplete and/or stupid specifications given. The presence of a transformer implies a mains driver but NO specs are given (except "350mAh" instead of mA in the title). How do they expect to sell them?
Incomplete specifications - unknown regulation method, and unknown if direct drive when Vbat > Vf. Probably just offers PWM mode control; unknown maximum current handling. 5 mode with memory; high (100%), medium (25%), low (5%), strobe (11 Hz), SOS (or just SO as reported by one user). Diameter figure in title inconsistent with listed dimensions.
3 mode; high (100%), low (15%), strobe (9 Hz). Incomplete specs - output current is just a guess and probably varies significantly depending on input voltage.
$3.13 (up from $2.80) (sold out and/or discontinued)
User interface driver
2.8-4.2 V
1
1x Li-ion
1200 mA
Can be modified to 1900 mA
1
17 mm
3 mode; high (100%), low (15%), strobe (9 Hz). Incomplete specifications - unknown regulation method, and unknown if direct drive when Vbat > Vf. Possibly just offers PWM mode control. Diameter figure in title inconsistent with listed dimensions (16 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.
Incomplete specifications given. Claimed to be for Cree XM-L but only has 2 A maximum output current. No inductor present so it's not a buck driver. Input voltage specs indicate it may be just a PWM driver.
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.
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.
Output voltage 16-18 V. Previously claimed to be suitable for E27 and GU10 light bulbs but is considerably bigger than drivers normally used for that purpose. Proposed purpose is a 5s5p array (25 total) of 1 W LEDs. Driver comes with its own heatsink.
Output voltage red 7.0-7.5 V, blue and green 9-11 V. Designed to be used to power 3 series LEDs in each of red, green and blue. Comes with remote control to adjust colours and modes.
Output voltage estimated to be red 23-25 V, blue and green 30-36 V. Designed to be used to power 10 series LEDs in each of red, green and blue. Comes with remote control to adjust colours and modes.
Linear regulator. Two modes, low (20 mA), medium (120 mA). Power interruption of less than 0.5 seconds is ignored. Power interrupted for 0.75 seconds or more changes modes. No power for 2 minutes or more resets to low mode.
Presumed to be a PWM controller for RGB LED strips which have current limiting resistors built in. 3 channel, output current maximum 4A per channel. 3 modes; smooth flow, strobe, fading. Blue anodised aluminium box, claimed to be waterproof (no IP rating given). IR remote control included.
Presumed to be a PWM controller for warm white/cool white 3258 LED strips which have current limiting resistors built in, with the idea apparently being to select the overall tint. 2 channel, output current maximum 4A per channel. Adjustable brightness; 20%, 40%, 60%, 80%, 100%. Golden anodised aluminium box, claimed to be waterproof (no IP rating given). IR remote control included.
Three mode; high, medium (30%), strobe (9 Hz). Reverse polarity protected. Specs mention "(1 x 123A or 1 x 16340 battery)" but a 16340 li-ion cell would likely cause this boost driver to be in direct drive.
5 modes with memory; high, medium (30%), low (3%), strobe (9 Hz), SOS. Claims to be suitable for 1x 14500 cell, but doesn't say if it's in direct drive with that input, relying on the voltage drop of a small Li-ion cell.
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).
5 modes, no memory; medium (30%), low (10%), high, strobe (8 Hz), SOS. No regulation - just PMW without current limiting, so the claimed 2000 mA is wrong and a brief review here says it will do more than 3 A with a good battery. The 8 mode version of this, DX sku.106799, has a claimed current range of 2-2.8 A - probably also too low.
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).
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).
Output voltage 23 V. Output current variously stated to be 2.6-3.0 A and 2.5-2.8 A, and output power 50-60 W - the same as the 5 LED version; buyer beware. Input current can be up to 8 A. 3 modes; high, medium (30%), low (10%). Low voltage protection at 6 V. Thermal protection at 55-60 °C (this seems very low).
Output voltage 30 V. Output current variously stated to be 2.6-3.0 A and 2.8-3.0 A, and output power 70-100 W when running on 3-4x Li-ion cells (which contradicts the claimed input voltage range); buyer beware. Input current can be up to 8 A. 3 modes; high, medium (30%), low (10%). Low voltage warning at 9 V (although a working minimum of 6 V is also stated). Thermal protection at 55-60 °C (this seems very low).
Three channel LED controller, maximum power switching 144 W, 4 A per channel. Multiple modes; 19 dynamic effects (5 speeds) plus circulatory display, 20 static colours (5 brightnesses). See DX sku.128425 for single channel version.
Details lack any mention of output current; assumed to be PWM only (no current limiting). No maximum limit stated. 5 mode; high, medium, low, fast strobe, SOS.
1 channel dimmer with mains power supply and LED strip
Single channel LED controller, maximum power and current switching unknown; assumed to be 4 A per channel. Multiple modes; 5 dynamic effects (5 speeds), static colours (8 brightness levels). See DX sku.128434 for RGB version.
Three channel LED controller, maximum power switching 144 W (12 V) or 288 W (24 V), 4 A per channel (12 A total) or 5 A maximum for a single channel. 21 modes. RF remote control.
$8.50 For 1-2: + shipping (sold out and/or discontinued)
Linear regulator
3.0-4.2 V
1
1x Li-ion
2600 mA constant current
5
17 mm x 7 mm high - two boards in double layer
Driver removed from site.
Unknown drive method - no inductor so presumed to be a linear regulator. 5 modes with memory (claims to not use PWM); high (2.6 A), medium (1 A), low (150 mA), strobe, SOS. Change mode group to 3 mode (high, medium, low) by blinking it off at the right moment. Low voltage protection - under 3 V drops to low mode and starts flashing. No polarity protection. A lower output version is Intl Outdoor p-415.
$8.50 For 1-2: + shipping (sold out and/or discontinued)
Linear regulator
3.0-4.2 V
1
1x Li-ion
2000 mA constant current
5
17 mm x 7 mm high - two boards in double layer
SKU number reused for a very different product.
Unknown drive method - no inductor so presumed to be a linear regulator. 5 modes with memory (claims to not use PWM); high (2.0 A), medium (1 A), low (150 mA), strobe, SOS. Change mode group to 3 mode (high, medium, low) by blinking it off at the right moment. Low voltage protection - under 3 V drops to low mode and starts flashing. No polarity protection. A higher output version is Intl Outdoor p-414.
4-digit dual SPI-controlled RGB LED strip dimmer controller
RGB controller for two SPI LED strips, suitable for 200-400 metres of SPI RGB LED strip. This controller does not control normal RGB LED strips directly. RF remote control.
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).
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).
Designed as a driver for fluorescent tube replacements, with 20-24 LEDs in series and 18 low power LEDs in parallel. Actual output voltage unknown. A 9-18 W version is sku.203740.
Output voltage 25 V (presumably this is about the centre of the output voltage range). This driver appears to be small enough for using for light bulbs.
3 channels, maximum 4 A per channel at 12 V. 12 V and RGB input, RGB output. Buyer beware - description claims 24 V input but photos indicate only 12 V input.
3 channel, maximum 2 A per channel. Buyer beware - product photos indicate it can be used with 24 V but description (and querying) excludes it. IR remote control. Stated length appears to be overall length of cable.
2 channel, maximum 2 A per channel. Designed to fade between two LED strips, such as two different colour temperatures giving continuously variable colour temperature.
Single channel output, maximum 12 A (although label on device says "3x4A"). Possibly has an RGB input - a bit strange. Stated length appears to be overall length of cable.
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.
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.
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.
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.
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.
Top board diameter 19 mm. PWM frequency 700 Hz. Thermal protection. Low voltage protection (I think that's what "run multhium battery protection" means).
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.
5 mode; high (700 mA with 1x AA, 900 mA with 2x AA), medium, low, strobe, SOS. Low voltage warning at 0.8 V and 1.8 V. Polarity protection. Also available (for much less) from Intl Outdoor Store p-417.
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.
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.
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.
Output voltage 36-64 V. IP67 dust/water rating. Note that this voltage represents a shock hazard - use with caution. Over current, over loading and short circuit protection.
3 channel, maximum 4 A per channel. Apparently the description's 12 V is correct, not the photo's "12-24V" (which has been photoshopped out of the first photo).
3 channel, maximum 4 A per channel. IR remote control. The size was formerly listed as 295 mm x 28 mm x 16 mm. Neither set of measurements really makes sense.
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.
Buck driver with components on both sides of main board. Larger dummy board for battery contact. 5 modes in 2 groups without memory; low (5%), medium (50%), high (100%), strobe, SOS. Alternate group by half press. Low voltage warning at 3.0 V and 5.8 V.
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.
Direct drive. No indication of maximum spec for current handling but a user test achieved 3 A without apparent damage. 2 modes; high, low. The claim of constant current clashes with the claim of direct drive - buyer beware. Low voltage protection.
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.
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.
Direct drive. 5 modes in two groups, high (100%), medium (40%), low (6%), strobe, SOS. Alternate group without flashing modes accessed by half press. Low voltage warning.
5 modes with memory; low (10%), medium (50%), high (100%), strobe, SOS. Disappointingly slow PWM frequency, 122 Hz. Low voltage warning and protection.
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.
Very much non-constant output; 1.5 V in gives 500 mA out, or 3.6 V in gives 800 mA out, but claimed to be constant current at 1.8-3.6 V. The talk of linear regulator in the product description just shows they don't know what they're talking about. The review mentions it's quite inefficient.
5 modes, high, medium, low, strobe, SOS. Very much non-constant output; 1.5 V in gives 500 mA out, or 3.6 V in gives 800 mA out, but claimed to be constant current at 1.8-3.6 V. The talk of linear regulator in the product description just shows they don't know what they're talking about.
5 modes; high (100%), medium (30%), low (5%), SOS, strobe. Output voltage 2-7 V, manually set; possibly hence the mention of direct drive. Claimed output of 3 A is seriously dubious (it might actually be input current). See DX sku.7882 for more details on the Nanjg 18 driver.
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.
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.
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).
Photo apparently shows 320 mA; the "current draw" figure is nonsense - buyer beware. Output voltage 54-70 V. Note that this voltage represents a shock hazard - use with caution.
Output current from photo; the "current draw" figure is nonsense. Output voltage 34-54 V. Note that this voltage represents a shock hazard - use with caution.
Output current from photo; the "current draw" figure is nonsense. Output voltage 48-77 V. Note that this voltage represents a shock hazard - use with caution.
3 modes with memory in 3 groups, change group with half push; high (3 A), medium (900 mA), low (150 mA). Alternate groups with 2 modes or 1 mode. Driver board 18 mm diameter. Low voltage warning, polarity protection.
1 channel, switched by PIR (passive infrared) sensor. Does not seem to have any adjustment of PIR sensitivity, background light sensitivity or 'on' duration.
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.
This is a constant voltage power supply, not a constant current LED driver, and is only included because it looks like an LED driver. LEDs should be driven with something to limit the current, such as a resistor. Output voltage 1-15 V. Input needs to be at least 2 V greater than output.
Buyer beware. Output voltage range initially not stated, then claimed to be 12.3-12.5 V, then defended as being 12.3-12.5 V. Not if it can drive 4 or 5 LEDs!
$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.
Unknown regulation method, unknown output current, unknown output voltage, input voltage range is a guess - buyer beware. 5 mode; high, medium, low, strobe, SOS. As used in this torch.
Unknown regulation method, unknown output current, unknown output voltage, input voltage range is a guess, unknown size - buyer beware. 5 modes; high, medium, low, strobe, SOS. As used in this torch.
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.
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.
Output current variously stated as 2.5-2.8 A and 2.6-3.0 A. Output voltage 17 V (range unknown). 5 modes; high (100%), medium-high (75%), medium (50%), low (30%), very low (5%) (no strobe!). Thermal protection, low voltage warning at 6 V.
Output current variously stated as 2.6-3.0 A and 2.8-3.0 A. Output voltage 30 V (range unknown). 5 modes; high (100%), medium-high (75%), medium (50%), low (30%), very low (5%) (no strobe!). Thermal protection, low voltage warning at 9 V.
Output current variously stated as 2.5-2.8 A and 2.6-3.0 A. Output voltage 23 V (range unknown). 5 modes; high (100%), medium-high (75%), medium (50%), low (30%), very low (5%) (no strobe!). Thermal protection, low voltage warning at 6 V.
Output voltage 17 V (range unknown). Output current variously stated to be 2.6-3.0 A and 2.5-2.8 A, and output power 50-60 W - the same as the 7 LED version; buyer beware. Input current can be up to 8 A. 3 modes; high, medium (30%), low (10%). Low voltage protection at 6 V. Thermal protection at 55-60 °C (this seems very low).
Designed as a LED driver for fluorescent tube replacements, with 20-24 LEDs in series and 12 low power LEDs in parallel. Formerly listed as 12W. Actual output voltage unknown.
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.
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.
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.
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.
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.
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 in Impractical Reverse Order; high, medium (50%), low (10%), strobe, SOS.
Output voltage 80 V maximum. Note that this voltage represents a shock hazard - use with caution. PWM input. Open circuit protection. Technical info here.
Output voltage 3-4 V. A forum comment for FT sku.2085200 points out the input contacts are very close together; this is dangerous - buyer beware. Unknown driver size.
Output voltage 3-4 V. A forum comment for FT sku.2085200 points out the input contacts are very close together; this is dangerous - buyer beware. Unknown driver size.
Output voltage 3-4 V. A forum comment for FT sku.2085200 points out the input contacts are very close together; this is dangerous - buyer beware. Unknown driver size.
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.
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.
Output voltage 44-86 V. Note that this voltage represents a shock hazard - use with caution. Note that the length is the cable length, not the driver length.
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.
$3.72 (up from $3.70) (sold out and/or discontinued)
User interface driver
2.8-4.2 V
1
2800 mA
1
17 mm
8 modes, and a strange mix they are; low (5%), high, fast strobe (16 Hz), very low (1%), medium strobe (3.3Hz), slow strobe (1 Hz), SOS, police strobe (16 Hz, 1 second off). However, a couple of users claim other modes such as 25% for the first mode, and no mode memory. The stated current range of 2.0-2.8 A implies it might just provide PWM modes without any current limiting. If so that range might be a bit low, and one user claims 4.34 A on high. See also the 5 mode version, DX sku.106796.
Output voltage 18-60 V (with 12 V input), 30-80 V (with 24 V input). Note that this voltage represents a shock hazard - use with caution. Heatsink included.
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.
$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.
$7.85 For 1-2: + shipping (sold out and/or discontinued)
Boost driver
1.0-3.2 V
1
1-2x AA,
1x LiFePO4
500 mA
4
17 mm
Driver removed from site.
Minimum input voltage is just a guess. 4 modes with 3 second mode memory; very low (7 mA), medium (160 mA), high, strobe. Polarity protection. Potted components (they're covered with goop).
$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.
$7.85 For 1-2: + shipping (sold out and/or discontinued)
Boost driver
1.0-3.2 V
1
1-2x AA,
1x LiFePO4
500 mA
4
17 mm
Driver removed from site.
Minimum input voltage is just a guess. 4 modes with 3 second mode memory; very low (7 mA), medium (100 mA), high, strobe. Polarity protection. Potted components (they're covered with goop).
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.
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.
Output current 600 mA with 1xAA, 1000 mA with 2xAA. Three modes; high, medium (30%), low (5%). PWM frequency 1 kHz. Flashing warnings for high temperature and low voltage (not stated if it warns at several low voltage levels). Bottom board (which is where the model number V10-136 comes from) apparently does nothing except provide a 17 mm board and can be removed to leave just a 15 mm single board boost driver with components on both sides.
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.
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.
$8.99 For 1-2: + shipping (sold out and/or discontinued)
Boost driver
0.9-3.0 V
1
1-2x AA
900 mA
4
18 mm x 8 mm high - components on both sides
Driver removed from site.
4 modes; high (650 mA with one AA, 900 mA with two AAs), medium (100 mA), low (10 mA), strobe. Low voltage protection; drops to low mode and starts flashing. Polarity protection.
$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.
$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.
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.
Maximum switching 30 W, 2 A. Switching by PIR (passive infrared). Does not seem to have any adjustment of PIR sensitivity, background light sensitivity or 'on' duration.
$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. An alternative is DX sku.57779.
1 channel, maximum 4 A. Switching by PIR (passive infrared). Length is a guess. Does not seem to have any adjustment of PIR sensitivity, background light sensitivity or 'on' duration.
Update Feb-Mar 2015: Buyer beware - the drivers shipped are not the drivers pictured (photos have since been updated); the claimed details (bizarrely 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.
Buyer beware. Unknown output voltage. Intended for use with a Cree MT-G2 but that LED is available in three voltage options - 6V, 9V and 36V. The claimed 18V output doesn't make sense. (The MT-G2 does have an 18W power rating.) If the 1000mA output current is correct this could only suit the 6V or 9V versions, as the 36V version is rated for 500mA.
Also, the claimed input voltage is 12-15 V but it's said to be suitable for 3-4x Li-ion, not just 4x Li-ion.
Buyer beware. Unknown output voltage. Intended for use with a Cree MT-G2 but that LED is available in three voltage options - 6V, 9V and 36V. The claimed 18V output doesn't make sense. (The MT-G2 does have an 18W power rating.) If the 1000mA output current is correct this could only suit the 6V or 9V versions, as the 36V version is rated for 500mA.
Also, the claimed input voltage is 5-12 V but it's said to be suitable for 4x Li-ion, not 2-4x Li-ion. However, the subtitle mentions 12-15V.
Buyer beware. Unknown output voltage. Intended for use with a Cree MT-G2 but that LED is available in three voltage options - 6V, 9V and 36V. The claimed 18V output doesn't make sense. (The MT-G2 does have an 18W power rating.) If the 1000mA output current is correct this could only suit the 6V or 9V versions, as the 36V version is rated for 500mA.
Also, the claimed input voltage is 5-12 V but it's said to be suitable for 4x Li-ion, not 2-4x Li-ion. However, the subtitle mentions 12-15V.
Claimed 4.5A output current but one user reported an output current of 3.5A but doesn't say what conditions that was measured under. Another user suggested the output current might be input voltage dependent.
5 modes in Impractical Reverse Order; high, medium, low, strobe, SOS. Claimed 4.5A output current but the single mode version (7217101) has some forum comments indicating the output current is only about 3.5A.
3 + 5 modes in two groups, but no indication of currents; low, medium, high; low, medium, high, strobe, SOS. A user of the 8x AMC7135 version (8727400) says it has memory.
There's no indication of what the "2800mAh" in the title refers to.
3 + 5 modes in two groups, but no indication of currents; low, medium, high; low, medium, high, strobe, SOS. A user of the 8x AMC7135 version (8727400) says it has memory.
There's no indication of what the "2800mAh" in the title refers to.
3 + 5 modes in two groups, but no indication of currents; low, medium, high; low, medium, high, strobe, SOS. A user of the 8x AMC7135 version (8727400) says it has memory.
There's no indication of what the "2800mAh" in the title refers to.
3 + 5 modes in two groups, but no indication of currents; low, medium, high; low, medium, high, strobe, SOS. A user of the 8x AMC7135 version (8727400) says it has memory.
There's no indication of what the "2800mAh" in the title refers to.
2 modes; high, low (10%). Buyer beware. Unknown regulation method, and the subtitle says it's intended for two LED luminous flux bins and a non-specific LED type suffix - simply nonsense (or Chinese code for "we don't have a clue about LEDs").
3 modes; high, low, flash. Buyer beware: The details says it's intended for a particular Cree LED luminous flux bin and a non-specific Cree LED suffix - simply nonsense (or Chinese code for "we don't have a clue about LEDs"). A reviewer says he got 5.5A with fresh cells, dropping down to 3.15A at 3.7V.
3 modes with memory, in Sensible Ascending Order, with the off-the-shelf current setpoints varying a bit; low (80mA), medium (somewhere in the range 700-1100mA), high (2200-3000mA). Double click for a hidden 12Hz strobe mode. Each steady mode is programmable.
This driver gets some good reviews. It uses an AON7520 MOSFET
Five modes in Impractical Reverse Order, unknown memory; high (4 A), medium (2 A), low (0.8 A), strobe, SOS. Claimed to be 10 W input power but with a 4 A output current that's not going to be true with a white LED.
A review for the 5 mode version (FT 7492700) says the actual output current is 2.5A. Unknown if the driver is actually dimmable as claimed in the title.
Not 4 A output current as claimed. Direct drive with 2x Li-ion, but output reasonably steady above ~8.0 V. Output flickers slightly when regulated output takes over from direct drive. Efficiency about 75%.
5 modes in Impractical Reverse Order; high, medium, low, strobe, SOS. The single mode version (FT 7217201) is not 4 A output current as claimed. direct drive with 2x Li-ion. Efficiency of about 75%.
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%.
Includes separate push button board (for changing modes?). Intended for the Convoy FX-30, which uses a Cree XHP70.2. 5 modes; low, medium, high, turbo, strobe.
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.
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.
Transformer with buck regulator. Constant current out 320-350 mA. Reported to not be very efficient (not normally a major problem for mains power). These are called GU10 drivers but do not themselves have the bayonet pins of the GU10 connector. Efficiency figure from a review.
For driving a single 5mm LED from an alkaline AA or AAA. Do not use with NiMH - the Joule Thief will suck it dry and leave it gasping or permanently dead. There's a handy instruction video on YouTube.
 Some changes to the basic circuit can increase efficiency and stablise output. (Love the ASCII diagrams - they're cool!)
Â
FWIW an open circuit Joule Thief can output over 50 volts, so they can be used for all sorts of things, like charging other batteries.
~300 mA output with one fresh AA, ~530 mA with two AA cells. Accurate testing has been difficult, presumably because of the high switching frequency of the board.
Boost driver (uses 2106F regulator chip). Reliable test data is hard to find and is complicated by people using different wiring methods. Some results are here and here but in the latter test, as pointed out, the output voltage dipping while the output current still climbs does seem a bit hard to believe. Discussion thread here.
Tip 1: It seems that modifying the set resistor to give a lower output current (max 500 mA) is a good idea.
Tip 2: Different wiring methods may give different efficiency figures.
Transformer with buck regulator. Called a GU10 driver but does not itself have the bayonet pins of the GU10 connector. Output current 300 mA @ approx. 9-10 V. Efficiency figures from reviews.
This product has been replaced on the retailer's web site with an LED optic. Oh boy. The driver may still be available elsewhere on the site. Update: The LED optic has vanished as well.
Output voltage 10-32 V, maximum output power 11.2 W. Specs state maximum input 220 V AC but label more sensibly states 250 V AC. IP66 dust/water rating.
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.
Â
Also available in SLIM versions which lack the heatsink and so have tighter input voltage tolerances.
$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.
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.
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.
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.
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.
2x AMC7135 (TR-025, formerly TR-0050 or TR-0025, formerly TR-025)
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.
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.
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).
$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).
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.
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.
$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.
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.
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.
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.
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.
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.
$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).
$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).
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
$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).
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 threetwo?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.
$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.
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.
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.
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.
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.
$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.
$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.
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.
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.
$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.
$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.
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.
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.
Former version 19 mode Nanjg 16 (NJG-016) is the one pictured on DX. New version (NJG18) has the first mode group with just low, medium, high as detailed here.
Previous version: 19 mode boost driver using "Seiko S-8352D (or a clone thereof)" (datasheet, PDF 528 KB) which is a constant voltage boost driver chip. User-adjustable output voltage (not current) ~2 V up to 7.4 V. Output voltage must be greater than input voltage; one report says it will keep working down to 0.3 V but will not turn on unless input voltage is at least 1.1 V. Note that it runs out of regulation, so is not a constant current or constant voltage driver. Capable of ~700 mA output from a single AA NiMH cell, or ~1000 mA from two. Efficiency in the 60-70% range if output is much over 1 W (running the board on 1x AA), and pushing 90% at ~1 W - amazing for an inexpensive boost driver. Do not operate without a load connected.
Is it suitable for a Li-ion cell? See a good analysis here by Tido, who writes: "Yes and no. It's possible to use this circuit with a high Vf LED like an XR-E... Things are different with an XP-G..."
Tip 1: To disable modes (and a mode list) see this post.
Tip 2: A mod to get this driver to fit an Ultrafire A10 is detailed here.
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.
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.
Boost board. Output voltage and current not constant; almost 300 mA from one fresh AA, almost 700 mA output with two fresh AAs. Modes are high, low, and three different flashing options! No mode memory.
Tip: Remove controller board to use as single mode driver.
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%.
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.
Â
Also available in non-SLIM versions which have a heatsink, allowing better heat dissipation and wider input voltage tolerance.
~500 mA output, current not constant. Spec claims 5 modes; high 100%, mid 35%, low 10%, strobe, SOS. However one reviewer claims 16 modes, and with the steady modes in the opposite order.
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.
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.
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.
Driver board with combined LED - Seoul P4 U2 (cool white). Board has 12 V maximum on it, but spec sheet shows 18 V maximum.
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Seems identical to L30.3 except for an extra hole on the L30.4.
Driver board with combined LED - Seoul P4 U2 (cool white). Board has 12 V maximum on it, but spec sheet shows 18 V maximum.
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Seems identical to L30.4 except for an extra hole on the L30.4.
Version 4: As of April 2010 buck drivers are being sent instead of boost drivers. Buyer beware. Update: Product is sold out.
Version 3: As of August 2008 there seems to be a new version which may have different components and may not cope with anything over 3.0 V.
Version 2: Boost driver using Zetec C300 control chip, no capacitors. 100~700 mA output, dependent on input voltage. Test data discussion (in which various people point out the test data is wrong).
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 source Fasttech 1424817.
Version 2: TR-0163B. Two green boards perpendicular to each other. Unknown if size has changed.
This is a constant voltage power supply, not a constant current LED driver. LEDs should be driven with something to limit the current, such as a resistor. The claimed maximum output current of 250 mA is quite low for the price; a 1 A power adaptor costs less. The claimed efficiency is much lower than 12 V mains power supplies normally are.
$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.
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.
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.
$4.12 (up from $3.94, down from $4.34, down from $4.44, down from $4.88, up from $4.50,
Boost driver
3.0-12.5 V (5-8.4 V claimed)
2-6
4-8x NiMH, 2x Li-ion
72-90%
650 mA constant current
Can be modified to 2000 mA
5
26 mm x 13 mm high
A boost board for up to 5 LEDs in series (so would be ideal for a well-heatsinked MC-E with the dice in series).
Version 2, TR-0055C or TR-5055C: Has a slightly smaller inductor than the previous version and uses the FP5138 regulator chip. Output is set to 650 mA.
Version 1, TR-0055 or TR-5055 or TR-0055a2 or TR-5055a2: Has a lovely big-looking inductor and uses the AS2001 regulator chip.
5 modes, with memory - high, medium (56%), low (26%), fast strobe, SOS. Test results here or here by EpRoM which includes a 30 minute test at 12.44 V. Voltage across sense resistor is 0.5 V.
Tip 1: An investigation into eliminating the flashing modes is here (for single mode mod see post 11 and pic in post 13).
Tip 2: Operation with >12 V input may need a resistor changed, and for running 6 LEDs the output capacitor may need to be changed - an analysis and discusssion is here.
$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.
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.
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?).
Output voltage 3.0-3.6 V. Output current stated to be 300/600 mA. IR remote control.
Appears to be a mains driver with three output wires (red=positive, white=negative, black=???), probably used to supply an RGB driver board.
It is stated to be compatible with ES27/GU10 bulbs.
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.)
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.)
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.
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.
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.
ideal for 2xAA,
NOT suited for 3x NiMH or Li-ion
77-89%
630 mA constant current
Can be modified to 1000 mA
1
17 mm
Constant current boost driver with either PAM2801 (max 350 mA) or PAM2803 (max 1000 mA) or J1JD (?) chip. Latest version outputs 630 mA; originally set to 380 mA. Claimed variable output current depending on input voltage, 600 mA (with 1.5 Vin) to 1.2 A (with 4.2 Vin), which makes me wonder what on Earth DX means by "Fully regulated circuit design"; those figures obviously aren't. However, testing by Hilarion showed perfectly stable current output from 1.2-3.2 V; very nice, although only 360 mA. Output current is determined by a sense resistor with 95±5 mV feedback voltage. Thus 0.25 Ω sense resistor as supplied in 2009 gives 380 mA, 0.15 Ω as presently supplied gives 630 mA,
0.1 Ω gives 950 mA (measured 900 mA at ~80% efficiency). Efficiency is said to drop horribly with input current > 2 A.
As pointed out in this thread there are no components to buck voltage as implied, so it would actually be direct drive when Vin is greater than Vf of your LED.
This product has vanished from the retailer's web site.
Boost regulator, although Wayne says "The Shark has a hard time at voltages below ~4V". Vin must be less than Vout, and should be >1/3 Vout (preferably >1/2 Vout). Maximum input current 4 A, efficient up to 2 A. Regulates on voltage or current, output current adjustable from 50-980 mA (or greater by changing set resistor, although that would remove load protection) at maximum 26 V. Open circuit protected. Some questions are answered in this forum thread.
 Shark vs MaxFlex forum thread.
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.
Driver board with combined LEDs - triple Cree XP-G R5 (cool white). Three modes; 100%, 20%, 2%. An extra momentary button (not supplied) allows access to four flashing modes and to manually set the middle mode anywhere in the range 0-50%. Below ~4.8 V in the output will drop out of regulation.
A new 1.55 A version is undergoing testing, as discussed here.
Driver board with combined LEDs - triple Cree XP-E R3 (cool white). Three modes; 100%, 20%, 2%. An extra momentary button (not supplied) allows access to four flashing modes and to manually set the middle mode anywhere in the range 0-50%.
A new 1.55 A version is undergoing testing, as discussed here.
Driver board with combined LEDs - triple Cree XP-G R4 (neutral white). Three modes; 100%, 20%, 2%. An extra momentary button (not supplied) allows access to four flashing modes and to manually set the middle mode anywhere in the range 0-50%. Below ~4.8 V in the output will drop out of regulation.
A new 1.55 A version is undergoing testing, as discussed here.
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.
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.
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.
Â
Claims to provide different current outputs (1-1.2 A) to different Cree efficacy bins. I think NOT.
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.
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.
Boost regulator, but apparently needs to be started with Vin between 3.4 V and Vf to start the full current regulation mode, otherwise it starts in safe mode, which is 1.5 A maximum input current. Constant current output, maximum 1 A. Board available as a "blank" (add set resistor), or preset to 400 mA, 500 mA, 750 mA and 1000 mA. Must always have a load connected.
$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.
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 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.
$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.
$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 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).
Boost regulator. Vin must be less than Vout. User adjustable constant current at 3-16 V, up to 1000 mA. Optional external adjustment. Must always have a load connected.
Driver has changed; the present driver name in this table is from the waterproof case on the previous version.
Output voltage 16-18 V. Note that 2.0 A output at 18 V is 36 W, significantly greater than the 30 W claimed, so it's possible the claimed output is approximate.
$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.
Output current 650-750 mA, output voltage 12-58 V. "Electronic internal resettable short circuit protection. Thermal protection and overload regulation." "Waterproof potting".
Output current is a guess. Input/output inconsistencies - buyer beware. Is it a boost driver or a buck/boost driver? One user claims it uses the XL6001 driver chip (datasheet - not presently linked from their web site), which offers PWM dimming. Efficiency figures from that datasheet.
$3.32 (down from $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.
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.
Boost regulator. Vin must be less than Vout. User configurable constant current, 350-1300 mA (increased from 1200 mA) at up to 29 V (increased from 24 V). uController UI, status LED. Open circuit protected, polarity protected.
 Shark vs MaxFlex forum thread.
Boost regulator. Vin must be less than Vout. Maximum 5 A input. User adjustable constant current output up to 2 A or 48 V (45 W max). Optional external adjustment. Open circuit protected, but if doing so, LED(s) must not be connected until output has discharged from 48 V.
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.
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!
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.
Output voltage 54-86 V. Note that this voltage represents a shock hazard - use with caution. IP67 dust/water rating. Short circuit, over current and overload protection.