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PELTIER COOLING OF SEMICONDUCTOR COMPONENTS
Bob Carey, Raymond Marlow
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Abstract
An evaluation was made of a Peltier cooler designed for a 2N1038 transistor, which dissipates 20 watts of power at room temperature, and is derated linearly to 0 watts at 100 C. Initial test results show a transistor case temperature of 9 C when the hot junction operates at 42 C and the transistor dissipates 10 watts of thermal power. The heat flux at the hot junction is high, and the amount of cooling attain-ABLE WITH THIS TYPE OF Cooler will be dependent on the efficiency of the heat sink used. A cooler with 5 junctions was evaluated using the finned heat sink. Both natural and forced convection means were used to transfer the heat from the hot junction to the ambient on this cooler. The transistor case temperature was approximately 40 C cooler with the Peltier cooler than without the cooler under the same cooling mechanism. (Author)