Patent ID: 7663352
Filing Date: 2010-02-16
Classification: H02M

Abstract:
1. A control circuit, for measuring and controlling an output current of a power converter, said control circuit comprising: a detection circuit, for generating a continuous-current signal and a peak-current signal by detecting a switching-current signal of a transformer; an integration circuit, for generating an average-current signal in response to said continuous-current signal, said peak-current signal and an off time of a switching signal, wherein integration circuit comprises: a first V-to-I circuit, for generating a first-charge current in response to said continuous-current signal; a second V-to-I circuit, for generating a second-charge current in response to said peak-current signal; a charge capacitor; and an integrated switch, coupled to charge said charge capacitor using said first-charge current signal and said second-charge current signal when said switching signal is disabled; and a switching control circuit, for generating said switching signal in response to said average-current signal, wherein said switching signal is coupled to switch said transformer and regulate said output current of said power converter.