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|1. (WO2018036041) RECTIFIER DIODE REPLACEMENT CIRCUIT AND REVERSE BIAS CUT-OFF DRIVE CIRCUIT|
|Applicants:||CHONGQING SOUTHWEST INTEGRATED CIRCUIT DESIGN CO., LTD
|Title:||RECTIFIER DIODE REPLACEMENT CIRCUIT AND REVERSE BIAS CUT-OFF DRIVE CIRCUIT|
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.