Switching power supply with transistor drive circuit

Details Switching power supply with transistor drive circuit Switching power supply with transistor drive circuit

1985-03-05

1986-09-02

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

307254, 307270, 323289, 363131, H02M 3335

Patent

active

046099808

ABSTRACT:
A switching power supply that comprises a base drive transformer, a switch device connected to one end of the transformer's primary winding, and a transistor having its base connected to one end of the secondary winding and its emitter connected to the other end of the secondary winding, also comprises a current-dependent voltage clamp connected across one winding of the transformer. The clamp circuit prevents the voltage across the primary winding from exceeding a predetermined value so long as the magnetizing current that flows in the primary winding when the switch device is opened does not exceed a predetermined value.

REFERENCES:
patent: 4447741 (1984-05-01), Moschopoulos
patent: 4562361 (1985-12-01), Hattori et al.
Palmucci, "Switching Regulator with Transistor Turnoff", IBM Tech. Discl. Bul., vol. 16, No. 4, p. 1161, Sep. 1973.

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