USB LiIon/LiPo charger and LED driver

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mhunley
 
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Joined: Tue Aug 19, 2014 6:02 pm

USB LiIon/LiPo charger and LED driver

Post by mhunley »

I am trying to build an ultra-compact LED light with high lumen output with inline micro-USB charging. I'm looking for an all-in-one board that combines the safe micro-USB charging with buckpuck LED driver output from a LiIon/LiPo battery. It is rather similar to the PowerBoost 500 (https://www.adafruit.com/products/1944). My best bet so far on the LED is a Cree XML2 driven at 2200mA with 3.2V (gets me 740 lumens @ 110 lm/w). My ideal LED is a linear array, rather than the industry norm star assembly on the LED. So far the battery packs I have that can deliver enough mAh to keep that light going for long enough (2.8 hours) are Tenergy 7.4V 2600mAh batteries, but I have nothing set in stone there. I am looking for off the shelf components (as low cost as possible of course) before I go build my own board. I'm ok daisy chaining charger to voltage booster to driver for prototyping, but don't want the waste/loss for my final version. Thanks!!!

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