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White LED Driver Circuit

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White LED Driver Circuit

Postby james_sgp » Tue Aug 07, 2012 12:57 am

Hi,
I`m trying to build an LED driver circuit for a torch, I have tried using a Micrel MIC2291 in both Boost & SEPIC configuration but it doesn`t seem to keep the current stable. The power source is a single 18650 LiPo battery, driving a CREE XP-G LED; I`m trying to drive it at between 800~1000mA; would appreciate anyones help in recommending an IC or circuit.

I want to make my own rather than buy as I have a limited space constraint for the PCB (max dia. 19mm , with a dia. 3mm hole in the middle).

James
james_sgp
 
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Joined: Tue Aug 07, 2012 12:46 am
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