SWITCHING DEVICE CONTROL CIRCUIT

摘要

There is offered a switching device control circuit that can accurately estimate a temperature of a power device to execute thermal shutdown without increasing the number of terminals. The control circuit has an output unit controlling an operating current flowing through an IGBT based on an input signal, a temperature detection unit outputting a detection signal when a temperature of the control circuit rises above a second preset temperature that is set corresponding to a first preset temperature of the IGBT after the IGBT commences its operation, and an output control unit controlling the output unit so as to turn off the IGBT in response to the detection signal.