Patent ID: 9461640
Filing Date: 2016-10-04
CPC Classification: H02M,H02P,H03K

Claim Text:
1. A switching element drive circuit that drives a switching element of a voltage control type, the switching element being switched from an off state to an on state by application of a voltage that is equal to or higher than a threshold voltage to a control electrode, the switching element drive circuit comprising: a voltage output unit outputting a voltage to said switching element; and a voltage switching unit switching a voltage provided to said voltage output unit, wherein said voltage output unit is configured as an amplifier circuit having a voltage amplification factor of 1, and in performing a turn-on operation of switching said switching element from the off state to the on state, said voltage switching unit provides said voltage output unit with a turn-on voltage having a value that is higher than said threshold voltage of said switching element and is lower than a value of a voltage of a power supply of said switching element drive circuit, and, when a predetermined turn-on voltage maintenance period has elapsed since the provision of the turn-on voltage, switches the voltage provided to said voltage output unit to the voltage of the power supply of said switching element drive circuit.