[Robotgroup] [OT] Regulator for White LED

[Paul Atkinson]

Thanks Vadim!

I'll take a look at the LTC3454.
Paul

On 4/18/07, vkonradi <vkonradi at swbell.net> wrote:
>
> I like Linear Technology for this sort of stuff.  They write good tech
> notes, have good development boards, and Digikey sells their ICs.  Their
> LTC3454 chip for instance looks like a good match for what you are
> doing.  And 90% efficiency for a buck-boost is not bad at all.
>
> Linear has this brochure on driving LEDs:
>
> http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1094,D24935
>
> There is also a decent Maxim app note on driving LEDs:
> http://www.maxim-ic.com/appnotes.cfm/appnote_number/3070
>
> Cheers!
>
> Vadim
>
> ----- Original Message ----
> From: Paul Atkinson <pmatkinson at gmail.com>
> To: The Robot Group Mailing List <robotgroup at puremagic.com>
> Sent: Wednesday, April 18, 2007 12:54:29 PM
> 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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