Overvoltage protecting circuit

Details Overvoltage protecting circuit Overvoltage protecting circuit

1990-12-21

1992-02-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 57, H02H 904

Patent

active

050918184

ABSTRACT:
In addition to a circuit for clamping a power supply voltage supplied from a power supply to a rated voltage, a circuit for clamping the power supply voltage to a voltage of less than the rated voltage is arranged. Even if it is necessary to flow a large current into the voltage clamping transistor for overvoltage protection, a large current can be flowed within a safe operating area of the transistor if the transistor is operated at a low voltage. Damage of the voltage clamping transistor or degradation of reliability can be prevented.

REFERENCES:
patent: 4334256 (1982-06-01), Mings
patent: 5027250 (1991-06-01), Cini et al.

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