Current spike protection circuit for switch-mode power supplies

Details Current spike protection circuit for switch-mode power supplies Current spike protection circuit for switch-mode power supplies

1982-06-10

1984-06-26

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 56, H02P 1322

Patent

active

044569505

ABSTRACT:
A circuit which prevents the flow of excess spikes of magnetization current in the primary windings of a transformer used in a switch mode power supply is disclosed. The circuit comprises an AC coupled, peak detecting, negative feedback path from a current sensing resistor in the primary windings of the transformer to the input of the voltage regulator so that as excess primary winding current spikes begins to flow the driving switches on the transformer primary are rapidly turned off thereby preventing any further rise in transformer primary current.

REFERENCES:
patent: 3657631 (1972-04-01), Martens et al.
patent: 3859586 (1975-01-01), Wadlington
patent: 4253138 (1981-02-01), Shelly et al.
patent: 4322817 (1982-03-01), Kuster
patent: 4404623 (1983-09-01), Jourdan

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