Protected three-pin mosgated power switch with separate input re

Details Protected three-pin mosgated power switch with separate input re Protected three-pin mosgated power switch with separate input re

1995-04-11

1996-10-08

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361103, 323277, H02H 302

Patent

active

055637590

ABSTRACT:
A three-terminal Smart Power MOSgated device has short circuit, over-temperature and over-voltage protection and the like. The control circuit and the protective circuits are powered from an input or control pin connected to a microprocessor. The output of the microprocessor is connected to a resistive divider circuit such that three potentials can be selectively produced at the divider mode, and comprise an on-level signal, an off-level signal and a reset level signal respectively. The control circuit contains an R-S latch which turns on in the absence of a fault signal to connect the on and off signal levels to the MOSgated device. During a fault, the R-S latch disconnects the control circuit input from the MOSgated device, and is reset only by the reset level signal which is distinct from the off signal level which is incapable of resetting the R-S latch.

REFERENCES:
patent: 4703390 (1987-10-01), Fay et al.
patent: 5497285 (1996-03-01), Nadd

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