Shutdown circuit for a switching power supply

Details Shutdown circuit for a switching power supply Shutdown circuit for a switching power supply

1979-12-12

1981-09-08

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 86, 363 26, 363 50, 323247, 323282, 307234, H02H 712

Patent

active

042888310

ABSTRACT:
A switching mode power supply provides a D.C. output voltage having a value related to the duty cycle of the supply's controlled oscillator produced signal. The inventive shutdown circuit inhibits operation of the supply if the duty cycle increases to a value indicative of failure of the supply to produce a minimum desired output voltage. Operation of the supply is inhibited for a predetermined shutdown interval following which a restart cycle deactivates the shutdown circuit for a period to allow the supply to attempt to establish its desired output.

REFERENCES:
patent: 3701937 (1972-10-01), Combs
patent: 3879647 (1975-04-01), Hamilton et al.
patent: 3896341 (1975-07-01), Kodama
patent: 3906258 (1975-09-01), Moe
patent: 3927352 (1975-12-01), Schatz
patent: 3940663 (1976-02-01), Meier et al.
patent: 3969635 (1976-07-01), Wilke
patent: 3980960 (1976-09-01), Hutchinson
patent: 4031463 (1977-06-01), Norberg
patent: 4071900 (1978-01-01), Jensen

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