[Robotgroup] [OT] Regulator for White LED

[Doug Evans]

how about using PWM and an appropriate sized capacitor?

what is the budget?

-----Original Message-----
From: robotgroup-bounces at puremagic.com
[mailto:robotgroup-bounces at puremagic.com]On Behalf Of Paul Atkinson
Sent: Wednesday, April 18, 2007 12:54 PM
To: The Robot Group Mailing List
Subject: [Robotgroup] [OT] Regulator for White LED


I'm looking for ideas for regulating the current for some White LEDS. Seems
like I've seen chips from Maxim that do this in the past, but I came up
empty with a recent search.

I'd like to use 3 AA batteries and be able to run down to 0.9V which should
be do-able with a buck/boost design.

Sorry if this is too technical, but any ideas are appreciated.

Paul
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