Ultra-quiet PC colling; a different approach

danial stocks diode at hotmail.com
Fri Mar 10 12:21:32 CET 2000


Peltier devices are prone to failure due to thermal stresses of heating and 
cooling.. while adjustment of current can control the heat pumping action, 
you then end up with a hefty current source dissipating lots of heat. 
switching on/off in small amounts [ie seconds-minutes] is very bad - this is 
where the thermal stress factor really takes hold! the recommended way to 
achieve temp control on a peltier is to use a PWM at 2Khz or thereabouts
Cheers,
Dan
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