Luxeon 5w driver

From: "Olivier" <ilgalla@xxxxxxxxx>
Date: Thu, 19 Oct 2006 16:16:20 GMT

Hello all.
Does anyone have an idea on how to build a constent current (1A) driver for such
a big white led (Vf=3,5v). I need to ligh it from 2 NiMh batteries (2,2v).
I have already tried a TPS61020 from TI (http://i10.tinypic.com/3yfmno3.gif) but
I had big thermal problem caused by the small package of the IC.

Olivier, Italy.

.

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