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Boost/Buck 3-18V 3 Modes 24mm 30W Circuit Board

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This circuit comes with low voltage protection at 5.7V, so please use two or more li-ion for best result.

Input Voltage: 3-18V (recommend use of 2-4pcs 4.2V 18650 or 4-6pcs 3V CR123A)
Output current (single LED): 4-5A
Output current (3 or 4 XM-L LED wired in serial): 3A
Modes: Low - Medium -- Height 

Low voltage Protection: When using single or two Li-ion batteries, input voltage becomes 5.7V, LED will flash twice per 3 seconds and then turn off after 3 minutes.
Over-heat Protection: When internal temperature becomes too hot, driver will automatically ramp down its brightness, make sure you "heat-sinked" the driver.

LED power output: single LED (8-10W), three or four LED wired in serial (25-30W)
Input requirement: Input current is about 3-3.5A, make sure the wiring and switch is capable of handling this type of high current.

 *When driving 3 or 4 XML (serial) with 1-2 li-ion (serial), this circuit acts as boost circuit. When using 3-4 lion wired in serial, this circuit becomes a buck and temperature regulated circuit.

Battery board measures 26mm
Main driver measures 24mm
Total heigh measures 17mm

Attention: One piece Circuit Board with 3~4 pieces "Thermally conductive adhesive". To make it better to thermally conductive, please smash the "Thermally conductive adhesive" and filled it between circuit board and body.

To get Volume Discounts,please TICK "Use volume discounts" during checkout.
You will see a bulk rate discount applied at the bottom of the shopping cart.
For higher volume discount rate, please contact us sales@kaidomain.com directly.

Quantity 3+ units 5+ units 10+ units
Rate $14.87 shipped $14.69 shipped $14.50 shipped

When you use bulkrate discount, a flat $1.70 of registered air mail fee will added to your shopping cart to ensure delivery of package.

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Ownership verified by KD Boost/buck driver
Posted by peter.sosna  on   1/21/2014 9:08:36 PM
Avg.Rating: star star star


Worked great at powering my 4 XM-l's


Switching board blew a chip and now only runs 1 mode which seems to be medium power.


When it works, it works great but mine didn't last more then a few minutes before some chip burnt out at 12v input.
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