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From: Jim Stockton
Subject: Re: Pelitier Device? (cooling an IC)
Date: Fri, 20 Dec 2002 09:42:11 -0600
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> I am looking for information on a device that uses electricty to cool an IC.
> The device is called a Pelitier junction, if memory serves. I've tried various
> spellings on a google.com search without finding any specific technical
> information. Maybe my spelling is THAT bad! (Wouldn't be the first
> time...won't be the last!)
> I need to find out if they work in a hot environment. I have an application
> where a microcontroller will need to operate in a 150 degree C environment. I
> need to find out if a Pelitier device will cool below ambient (which I doubt).
> If not, I think I need to put the micro into an enclosure and add cooling.
> Shy of these, any other ideas???
> Any leads/tips/help would be appreciated.
Depending on the controller you are using 150C should not be real
difficult. You won't even need high temperature solder if you don't have
a lot of heat generated in the board. Just look for a controller that is
fully static (eg min clock speed spec of dc). You may have to hunt for
crystals but start with at cut in welded cans. If you need more accuracy
than that look for sc cut crystals(expensive). Metal film resistors work
fine. Use COG or X7R caps. Tantalum caps also work ok. BC components
make AL electrolytics that also work fine.
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