The Design of 100 W Switching Power Supply APFC Based on L6563

This paper briefly discusses the basic principle of the APFC(Active Power Factor Correction) Transition Mode, then it analyses the working principle of L6563 chip, and use L6563 chip made a 100 W with active APFC Switching Power Supply prototype. Through testing, the results show that the PF(Power Factor) can above 0.98, THD(Total Harmonic Distortion) is less than 8%.