Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ta-yung Yang0
Date of Patent
December 21, 2010
0Patent Application Number
116260260
Date Filed
January 23, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A control circuit is provided to generate a mode signal at light load of the power converter. The mode signal is coupled to disable the switching signal for saving power. The impedance of an input circuit is increased in response to the mode signal. Furthermore, a soft start circuit is initiated by the mode signal when switching signal is enabled. An external capacitor associates with the impedance of the input circuit determine the off period of the switching signal.
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