Capacitance-Multiplexed Current Source Charge Pump Power Factor Correction Converter With Wide Input Voltage Range

Power factor correction (PFC) technology has been widely used to reduce the harmonic pollution of power electronic equipment. The single-stage PFC converter composed of a current source charge pump (CS-CP) has a simple structure and high power factor (PF), but the operating range is narrow. Based on the single-stage CS-CP PFC converter, a capacitance-multiplexed CS-CP PFC converter is proposed in this article, reducing a diode and improving the efficiency. An LLC half-bridge resonant circuit is used as a current source to provide high-frequency current into the charge pump to achieve PFC. By reusing the resonant capacitors as the charge pump capacitor, the simple structure of the CS-CP PFC converter is preserved, and the problem that the converter can only obtain high PF in a narrow input voltage range is solved. So that the proposed converter can achieve high PF in a wide input range of 100-242 VAC. Finally, the theoretical analysis is verified by the simulation and experiment.