Semiconductor device gate control circuit, has voltage step-up power supply circuit placed between power supply terminal and battery and providing output voltage which is not lower than setpoint at gate control integrated circuit side

摘要

The circuit has a battery (1) to deliver a power supply voltage, and a gate control integrated circuit (4) controls a gate of a semiconductor device. A power supply terminal (4a) is arranged on the integrated circuit (4) side. A voltage step-up power supply circuit (11) placed in connection between the terminal and battery receives the voltage and provides an output voltage which is not lower than a setpoint at the circuit (4) side.