Push-pull drive circuit for a power converter

Details Push-pull drive circuit for a power converter Push-pull drive circuit for a power converter

1988-02-12

1989-05-09

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 56, 363133, 361 90, H02M 3135

Patent

active

048294152

ABSTRACT:
A power supply includes a source of first and second switching signals that are at opposite phases. First and second MOS power transistors have main current conducting electrodes coupled to a transformer and have gate electrodes that are respectively coupled to the first and second signals to provide push-pull operation. When a transition occurs in a first one of the MOS transistors from a conductive state to a nonconductive state, a voltage is developed at its gate electrode due to its input Miller capacitance. The gate electrode voltage is coupled to a control terminal of a controllable attenuator that attenuates the switching signal that is coupled to the gate of the other MOS transistor. This delays the initiation of the conductive state in the other MOS transistor until immediately after the first transistor becomes nonconductive, thereby avoiding simultaneous conduction in the two transistors.

REFERENCES:
patent: 3859583 (1975-01-01), Reed
patent: 4150426 (1979-04-01), Jansson
patent: 4184128 (1980-01-01), Nilssen
patent: 4319315 (1982-03-01), Keeney, Jr. et al.
patent: 4441087 (1984-04-01), Nilssen
patent: 4456949 (1984-06-01), Incledon
patent: 4628284 (1986-12-01), Bruning et al.

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