Chimney Effect on Natural Convection Cooling of a Transistor Mounted on a Cooling Fin
نویسندگان
چکیده
The thermal impedance Zth j has been measured for the junction of a transistor mounted on a cooling fin. The setup was put inside a chimney in order to enhance the natural convection cooling. From the thermal impedance Zth j the influence of the chimney on the reduction in thermal resistance Rth Zth j 0 is clearly visible. A maximum improvement of almost 20% has been observed experimentally. Measuring the thermal impedance as a function of the angular frequency provides specific information about the thermal path being influenced by the chimney. DOI: 10.1115/1.3068307
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