Patent ID: 8203315
Filing Date: 2012-06-19
Classification: H03K

Abstract:
1. A method for operating a power semiconductor circuit arrangement, the method comprising: providing a power semiconductor chip comprising a power semiconductor switch with a first load terminal and with a second load terminal; providing a first temperature sensor that is thermally coupled to the power semiconductor switch; providing a second temperature sensor; switching OFF the power semiconductor switch or keeping the power semiconductor switch switched OFF if a temperature difference between a first temperature of the first temperature sensor and a second temperature of the second temperature sensor is greater than or equal to a switching-OFF threshold temperature difference which depends, following an inconstant first function, on a voltage drop over the power semiconductor switch between the first load terminal and the second load terminal; and switching ON the power semiconductor switch or keeping the power semiconductor switch switched ON if the temperature difference between the first temperature and the second temperature is less than or equal to a switching-ON threshold temperature difference which depends, following a second function, on the voltage drop over the power semiconductor switch between the first load terminal and the second load terminal, wherein