CIRCUIT AND METHOD FOR DRIVING LOAD USING POWER FACTOR CORRECTION FUNCTION,申请号JP20100140716-传众专利搜索

CIRCUIT AND METHOD FOR DRIVING LOAD USING POWER FACTOR CORRECTION FUNCTION

申请公布号：JP2011004595(A)

申请号：JP20100140716

申请日期：2010.06.21

申请公布日期：2011.01.06

申请人：

O2 MICRO INC

发明人：LIU DA;KUO CHING-CHUAN;LEE SHENG-TAI

分类号：H02M7/12;H02M3/155;H02M3/28;H05B37/02

主分类号：H02M7/12

摘要：PROBLEM TO BE SOLVED: To provide a circuit and a method for driving a load using a power factor correction function.SOLUTION: The circuit includes a power line, a converter circuit and a controller. The power line is operable so as to supply an input current and an input voltage. The converter circuit coupled with the power line converts the input voltage into a regulated voltage in order to drive the load and is operable so as to supply a current detecting signal showing whether a converter current running through the converter circuit is lowered to a prescribed level. The controller coupled with the converter circuit is operable so as to correct a power factor of a circuit based on the current detecting signal and the input voltage as a waveform of the input current follows a waveform of the input voltage.