Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 3, 2007
Patent Application Number
11645772
Date Filed
December 27, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention discloses a primary-side feedback switching power supply that uses a sample-and-hold circuit to obtain a corner voltage of a harmonic wave voltage while the primary-side auxiliary winding is operating at a discontinuous mode as a feedback control, and provides both voltage regulation and current limit functions. A stable voltage output is provided within the nominal input voltage and nominal output load, such that when the output reaches a current limit, the output voltage drops but the output current is controlled to remain unchanged, so as to provide an over-current protection.
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