GATE DRIVING CIRCUIT

摘要

Provided is a gate driving circuit wherein start-up of a constant current in a constant current circuit is quick and power is saved. The gate driving circuit is provided with a constant current driving circuit (28) for supplying the constant current; a gate terminal of a power semiconductor element (1) connected to an output terminal of the constant current driving circuit; a comparator (22), which compares the voltage of the gate terminal with a prescribed set voltage value, and outputs a signal indicating that the voltage of the gate terminal is higher than the set voltage value; and a drive control section (20) which increases the current of the constant current driving circuit by receiving a signal which turns on the power semiconductor element, and reduces the current of the constant current driving circuit by receiving the signal from the comparator.