Fault detection circuit for use with a power control device

Details Fault detection circuit for use with a power control device Fault detection circuit for use with a power control device

2005-08-09

2005-08-09

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

C361S103000, C361S100000

Reexamination Certificate

active

06927963

ABSTRACT:
A fault detection circuit that includes a controllable switch coupling a power source to a load. Control circuitry is provided that determines if the switch is in the proper conduction state based on a switch control signal and a signal indicative of power delivered to the load. If the switch is determined as improperly closed (conducting), the control circuitry diverts energy delivered to the load through fuse circuitry, thereby blowing a fuse and decoupling the load from the power source. In preferred embodiments, logic circuitry determines the relative states of the control switch and the load and generates a control signal to divert energy away from the load and blow a fuse.

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