Patent ID: 6998899
Filing Date: 2006-02-14
Classification: G01K,G01R,H03K

Abstract:
1. Apparatus for indirectly sensing the temperature of a power MOS device comprising: a power MOS device having a current sense circuit for sensing a current in the power MOS device; a circuit for producing a voltage related to a drain-source voltage of the power MOS device; a comparator coupled to receive at a first input the voltage related to the drain-source voltage of the power MOS device and at a second input a voltage related to the current in the power MOS device; the comparator generating an overtemperature protection signal when a predetermined inequality between the voltages at the first and second inputs to the comparator occurs, wherein the circuit for producing a voltage related to the drain-source voltage comprises a voltage divider coupled between the drain and source of the power MOS device.