Patent ID: 9698769
Date: 2017-07-04
CPC Classifications: H01L,H03K

Claim:
1. A semiconductor device, comprising: a diode-integrated IGBT element arranged in a same semiconductor substrate including a diode element and an IGBT element driven by a drive signal that is inputted to a gate of the IGBT element; a sense element including a diode sense element and an IGBT sense element, the diode sense element being supplied with a current proportional to a current flowing through the diode element, and the IGBT sense element being supplied with a current proportional to a current flowing through the IGBT element; a switch element that: is connected to a first current pathway passing through the diode sense element and connected to a second current pathway different from the first current pathway; is turned off to control the second current pathway to be discontinuous with the first current pathway when no current flows through the diode sense element; and is turned on to control the second current pathway to be continuous with the first current pathway and apply a current to the second current pathway when a current flows through the diode sense element; and a current detection unit that detects an electric current state of the second current pathway.