Patent ID: 8614568
Filing Date: 2013-12-24
Classification: H02M,H03K

Abstract:
1. A gate drive circuit for driving a voltage-driven semiconductor element used in a power converter, comprising: a gate power source; a push-pull circuit including an NPN transistor and a first PNP transistor connected in series; a diode connected in series with the push-pull circuit between positive and negative electrodes of the gate power source; a negative voltage generating circuit connected between the positive electrode of the gate power source and a connecting point of the push-pull circuit and the diode; and a second PNP transistor connected between an output terminal of the negative voltage generating circuit and the negative electrode of the gate power source, wherein a junction point of the NPN transistor and the first PNP transistor is connected with a gate terminal of the voltage-driven semiconductor element via a gate resistor; and an emitter terminal of the voltage-driven semiconductor element is connected with the negative electrode of the gate power source.