No. Current, Average Junction Temperature Calculated Peak A Voltage, V Measured Peak cm2 cm2 Area, Generation, (extrapolated), Temperature, Temperature, THERMAL PROPERTIES OF DEVICES The area of power generation at steady state for various operating conditions has been determined from the cooling response for several different devices. In addition, the average junction temperature was determined by extrapolating the cooling response back to zero time (NBS Spec. Publ. 400-8, pp. 4951). For these same devices, the heating response was also determined. Because it is relatively independent of operating conditions, the heating response was used to determine the total active area of the device by assuming one-dimensional transient heat flow for the first few milliseconds of heating. This was used to calculate of v eq (9) and together with the data of fig 30 to calculate the peak temperature. The peak temperature was also measured with t infrared microradiometer. The results of these experiments are summarized in table The close agreement between the calculated and measured peak junction temperatures dicates the feasibility of estimating the peak junction temperature by this method. (D. L. Blackb |