Patent ID: 6807038
Filing Date: 2004-10-19
Classification: H02M

Abstract:
A semiconductor device comprising:a plurality of sets of complementarily operating first and second switching elements serially interposed between first and second main power supply terminals supplied with a dc voltage; a plurality of control circuits driving/controlling said plurality of sets of first and second switching elements respectively; and a shunt resistor detecting a current flowing across said first and second main power supply terminals, wherein each of said plurality of control circuits comprises: at least one current detection circuit detecting a voltage generated by a current flowing to said shunt resistor and outputting a current abnormality signal indicating current abnormality when detected said voltage is in excess of a prescribed level, and a fault circuit receiving said current abnormality signal output from said at least one current detection circuit and outputting a stop signal for stopping operation of at least one of said first and second switching elements, corresponding to said current abnormality, and said fault circuit has a function of outputting said stop signal to a different control circuit other than said control circuit to which itself belongs while stopping operation of at least one of said first and second switching elements which is controlled by said control circuit to which itself belongs also by said stop signal input from said different control circuit.