公开(公告)号：US20220345128A1

公开(公告)日：2022-10-27

申请号：US17640980

申请日：2020-12-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta NAGATOMI ,  Shingo ENOMOTO ,  Songbaek CHOE ,  Osamu TABATA ,  Noboru NEGORO

IPC: H03K17/567 ,  H03K17/06 ,  H03K17/16 ,  H02M1/00

Abstract: A gate drive circuit that drives a power device by controlling charge and discharge of gate capacitance of the power device includes: a first semiconductor switch that charges the gate capacitance by being brought into conduction according to a first control signal; a second semiconductor switch that discharges the gate capacitance by being brought into conduction according to a second control signal; and a slew rate control circuit that is connected between a gate of the power device and a ground line, and controls a slew rate during discharge. The slew rate control circuit includes a capacitor and a third semiconductor switch connected in series. The third semiconductor switch is brought into conduction according to the second control signal.

公开(公告)号：US20200186145A1

公开(公告)日：2020-06-11

申请号：US16793970

申请日：2020-02-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shuichi NAGAI ,  Shingo ENOMOTO ,  Noboru NEGORO ,  Yasufumi KAWAI ,  Songbaek CHOE ,  Osamu TABATA

IPC: H03K17/567 ,  H02M7/217

Abstract: A gate driving circuit that controls a switching element includes: a startup switch which is provided between a gate voltage source and an output terminal; a termination switch which is provided between the output terminal and an output ground terminal; a startup resistor provided between a gate and a source of the startup switch; and a termination resistor provided between a gate and a source of the termination switch. At least one of the startup resistor or the termination resistor is configured to adjust a resistance value.