Concept and modeling when a thermal gradient occurs between the thermistor’s terminals Thermistor modeling in VHDL-AMS

Abstract

In recent years, in-vehicle electrical components have been increasing in performance and density. For this reason, the temperature gradient of the board used in the ECU has become larger. A thermistor is often used as a heat sensor for electronic equipment, but the standard guarantees only a uniform temperature condition A temperature difference began to occur between the thermistor electrodes, and a temperature greatly deviating from the original temperature was detected. In this paper, first, it was clarified how the thermistor shows the error due to the temperature difference between the electrodes. It shows that accurate temperature detection is possible by modeling with VHDL-AMS.