Semiconductor device i.e. glow plug supply control unit, for controlling supply of metal glow plug during starting diesel engine, has protection diode integrally formed in MOSFET such that diode is attached between drain and supply terminal

摘要

The device has a common power supply wire (Wb) attached between a drain (D) of a power MOSFET (10) and a direct current battery (2) for transferring drive power from the battery to the MOSFET and a control-integrated circuit (IC) (11) via the drain, a power supply terminal (D2), and a IC control terminal. A terminal commutation protection diode (102) is integrally formed in the MOSFET such that the diode is attached between the drain and the supply terminal for limiting a flow of current from the control terminal to the supply terminal.