The document proposes a new three-level quasi-two-stage single-phase power factor correction (PFC) converter that provides flexible output voltage and improved conversion efficiency. It aims to address issues with existing PFC converter topologies like high voltage/current stresses on components. The proposed design features sinusoidal input current, a three-level output characteristic, and can output flexible DC voltages. It is intended for applications like plug-in electric vehicle charging and vehicle-to-grid systems.