MOSFET with temperature protection

摘要

Between the gate and source electrodes (7, 8) of a MOSFET (1), a switching element (2) which is thermally coupled to the MOSFET (1) is connected which switches off the MOSFET (1) when a critical temperature is reached. The switching element generates a temperature-dependent signal by means of which a device (3) is controlled. The device (3) switches on a voltage reducing element located between the gate and source electrodes (7, 8) of the MOSFET (1) when a temperature is reached which is lower than the critical temperature. As a result, the gate-source voltage of the MOSFET and thus the current flowing through it are reduced. The temperature rise is slowed down. <IMAGE>