Design and implementation of a interleaved single-phase power factor correction Zeta converter

This paper presents a single-phase power-factor-correction (PFC) AC-DC step-up/down Zeta converter. It is operated in discontinuous conduction mode (DCM) to achieve unity power factor and step-up/down DC output voltage. The proposed converter is suitable for universal line voltage (90 ~ 264 V) and wide output power range. The operating principle and steady-state analyses of the voltage gain and the boundary operating condition are discussed. Finally, a 400 W / 200 V prototype sample is built in the laboratory to verify the feasibility and performances of the proposed converter.