Switched mode power supply

Details Switched mode power supply Switched mode power supply

Filed on

1984-11-13

Date issued

1986-06-17

Examiner

Wong, Peter S.

Patent Class

Electric power conversion systems

SubClass

Current conversion

SubSubClass

Including automatic or integral protection means

Other Related Categories

363 21, 361100, H02H 7122

Type

Patent

Status

active

Patent number

045959773

Description

ABSTRACT:
A switched mode power supply, particularly for a television receiver with standby operation, including a protection circuit for limiting the current on the primary side of the power supply transformer and preferably also a protection circuit against too high a voltage on the secondary side of the transformer. According to the invention, a further protection circuit including a thyristor is provided on the primary side so as to periodically block the switching transistor of the power supply oscillator when the current on the primary side becomes too high and exceeds the limit value.

REFERENCES:
patent: 3678368 (1972-07-01), Popp
patent: 4316242 (1982-02-01), Colangelo et al.
patent: 4323961 (1982-04-01), Josephson
patent: 4328537 (1982-05-01), Schmidtner et al.
patent: 4410935 (1983-10-01), Dang
patent: 4427902 (1984-01-01), Hickman et al.
patent: 4447841 (1984-05-01), Kent
patent: 4516168 (1985-05-01), Hicks
patent: 4520437 (1985-05-01), Boettcher, Jr. et al.
Article by R. Dangschat et al., "Ein Sperrwandler-Netzmodul mit Netztrennung", Funkschau 1975, No. 5, pp. 40-43.

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