Document Type and Number:
Japanese Patent JPH0139314
Kind Code:
B2
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.
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Inventors:
KURIFUOODO BII KOODEII JUNIA
Application Number:
JP10326783A
Publication Date:
August 21, 1989
Filing Date:
June 09, 1983
Export Citation:
Assignee:
YOKOGAWA HYUURETSUTO PATSUKAADO KK
International Classes:
H02M3/28; H02M3/337
Next Patent: JPH0139315