Voltage transient protection circuit for MOSFET power transistor

Details Voltage transient protection circuit for MOSFET power transistor Voltage transient protection circuit for MOSFET power transistor

1984-02-10

1985-10-29

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

330207P, 361 91, 361110, 361111, H02H 904

Patent

active

045503591

ABSTRACT:
A pair of MOSFET power transistors are connected in a push-pull configuration to drive a tapped transformer and a load. A pair of diodes and an energy coupling circuit containing a capacitor and resistor in parallel bias the transformer primary in such a manner as to limit transients in a nonconducting MOSFET when the other MOSFET is conducting, aided by a drop in voltage at an inductor (ferrite bead) network which develops at the moment of MOSFET transistor conduction. This is due to a momentary change in the impedance ratio.

REFERENCES:
patent: 4389702 (1983-06-01), Clemente et al.
"VMOS Transistors As Fast Switches", Elektron Entwickl, (Germany), _vol. 13, No. 10, pp. 66-72, 10/78.

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