>
>> -----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.

>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 27 June 2006 12:58
>To: 'Microcontroller discussion list - Public.'
>Subject: RE: [EE] Peltier Device Info wanted.
>
>
>Didn't know that Olin. I suppose you shouldn't PWM a peltier 
>cooler then?
>
>joe

You can use PWM as long as you you filter the output.  Raw PWM has a very high ripple factor which will hurt the performance of a TEC.

Regards

Mike

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