Overvoltage protection circuit of output MOS transistor

Details Overvoltage protection circuit of output MOS transistor Overvoltage protection circuit of output MOS transistor

2004-09-24

2009-08-18

Paladini, Albert W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S056000, C361S111000, C361S118000

Reexamination Certificate

active

07576964

ABSTRACT:
An overvoltage protection circuit is for a circuit of an output MOS transistor and a load connected in series between a first power supply and a second power supply. The overvoltage protection circuit contains a control signal circuit, a dynamic clamping circuit, a control switch, and a serge detecting circuit. The control signal circuit is connected between a gate of said output MOS transistor and said load, and the dynamic clamping circuit is connected with said gate of said output MOS transistor. The control switch is connected between said first power supply and said dynamic clamping circuit and the serge detecting circuit which monitors a voltage of said first power supply and turns on said control switch when the voltage of said first power supply increases to a voltage higher than a predetermined voltage.

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