Search International and National Patent Collections

1. (WO2018036041) RECTIFIER DIODE REPLACEMENT CIRCUIT AND REVERSE BIAS CUT-OFF DRIVE CIRCUIT

Pub. No.:    WO/2018/036041    International Application No.:    PCT/CN2016/111191
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Thu Dec 22 00:59:59 CET 2016
IPC: H02M 7/217
H02M 1/08
H03K 17/04
Applicants: CHONGQING SOUTHWEST INTEGRATED CIRCUIT DESIGN CO., LTD
重庆西南集成电路设计有限责任公司
Inventors: ZHANG, Zhenrong
张真荣
FAN, Lin
范麟
WANG, Lu
王露
LIU, Yongguang
刘永光
YU, Jinchuan
余晋川
HE, Xudong
贺旭东
WAN, Tiancai
万天才
XU, Hua
徐骅
Title: RECTIFIER DIODE REPLACEMENT CIRCUIT AND REVERSE BIAS CUT-OFF DRIVE CIRCUIT
Abstract:
A rectifier diode replacement circuit having reverse bias cut-off drive, comprising a rectifier diode circuit and a reverse bias cut-off drive circuit (6). The reverse bias cut-off drive circuit detects voltages at both ends (A, K) of the rectifier diode circuit. When a cathode potential is greater than an anode potential, the reverse bias cut-off drive circuit forms a rapid charge discharge channel at a gate of a power MOS transistor (Q) to cut off the power MOS transistor, or the reverse bias cut-off drive circuit forms a rapid charge discharge channel at both ends of an energy storage capacitor (C) so that the energy storage capacitor discharges by means of the reverse bias cut-off drive circuit, and when the voltages at both ends of the energy storage capacitor are lower than an output voltage of a bandgap reference circuit (3) in the rectifier diode circuit, a hysteresis comparator (4) outputs an off signal to be amplified by a drive amplifier (5) to cut off the power MOS transistor. According to the reverse bias cut-off drive circuit, the rectifier diode circuit can be converted from a forward bias to a reverse bias, and then is rapidly cut off.