Single-stage power factor correction ac-dc converter based on continuous input current charge-pump topologies

Abstract

This paper presents a new single-stage power factor corrected (PFC) AC-DC converter. The topology is based on CIC-CPPFC (continuous input current charge-pump power factor correction) technique, achieving continuous conduction mode (CCM) input current with high power factor and reduced current ripple by using a coupled inductor, meeting IEC 61000-3-2 regulations for wide load range without additional input filter. The converter operates with zero voltage switching (ZVS) resulting in high efficiency for a wide load range. It is also a cost effective and competitive solution for low power applications where a two stage approach is costly and passive filters are not recommended. Another feature is the absence of a bulky delink capacitor, reducing costs and presenting a significant advantage over many single-stage solutions.