Abnormality detection and protection circuit for semiconductor d

Details Abnormality detection and protection circuit for semiconductor d Abnormality detection and protection circuit for semiconductor d

1997-02-28

1999-06-15

Medley, Sally C.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 94, 361100, H02H 324

Patent

active

059127945

ABSTRACT:
An abnormality detection and protection circuit is provided in association with a driving circuit for a semiconductor device, for detecting plural types of abnormalities and protecting the device from the abnormalities. The present circuit includes a plurality of abnormality detecting devices for detecting the plural types of abnormalities, respectively, a plurality of abnormality storage circuits each provided for the corresponding abnormality detecting devices for storing occurrence of the corresponding type of abnormality, and an abnormality transmitting circuit that transmits a signal representing the detected type of the abnormality to an overall control system for controlling a plurality of semiconductor devices. The circuit of the invention further includes an operation stopping device for stopping a switching operation of the semiconductor device, which device is immediately operated if the detected abnormality is of a type that requires emergency protection, so as to automatically stop the switching operation of the semiconductor device.

REFERENCES:
patent: 5216352 (1993-06-01), Studtmann et al.

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