Didn't know that Olin. I suppose you shouldn't PWM a peltier cooler then?

joe

> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of Olin Lathrop
> Sent: 27 June 2006 12:23
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] Peltier Device Info wanted.
> 
> 
> Alan B. Pearce wrote:
> > Has anyone here driven peltier devices from a switching 
> regulator? How 
> > much ripple would you expect to allow? Essentially I am looking to 
> > minimise the size of output capacitor on the regulator, so 
> if >200mV 
> > ripple on 1.5V supply is permitted, that would be great.
> 
> A Peltier device doesn't inherently care about ripple, but it 
> does get less efficient as the AC component increases.
> 
> 
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