Accession Number : ADD016466

Title :   Fault Protection Circuit for Power Switching Device.

Descriptive Note : Patent Application, Filed 5 Apr 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Raposa, John R

Report Date : 05 Apr 1994

Pagination or Media Count : 19

Abstract : A fault protection circuit for a power switching device. The circuit comprises a driver circuit electrically connected to the power switching device, a saturation comparator electrically connected to the collector of the switching device to determine if the switching device is switching an excessive voltage, and two undervoltage comparators to determine if the gate is receiving sufficient voltage. If the gate is oversaturated the saturation comparator enables the gate of a field effect transistor which drains the gate of the switching device, and the saturation comparator also disables the driver circuit. The undervoltage detectors detect insufficient voltage to the driver circuit and disable the driver circuit. Once the driver circuit is disabled the control circuitry can take corrective action.

Descriptors :   *PATENT APPLICATIONS, *SWITCHING CIRCUITS, *METAL OXIDE SEMICONDUCTORS, ACCUMULATORS, CIRCUITS, COMPARATORS, CONTROL, DETECTORS, FAULTS, FIELD EFFECT TRANSISTORS, POWER, PROTECTION, SATURATION, SWITCHING, TRANSISTORS, VOLTAGE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE