Switched-capacitor hybrid DC-DC converter with reduced passive component volume

This paper introduces a novel hybrid DC-DC converter derived from conventional switched-capacitor converter topologies. In this design, a filter inductor is integrated into a conventional switched-capacitor converter topology, which significantly enhances the voltage regulation flexibility and performance. The proposed hybrid converter achieves superior voltage gains and a wider range of gain adjustability compared to conventional switched-capacitor converters. The incorporation of switched capacitors also enables a higher power density than standard boost converters, facilitating improved integration and miniaturization. The study presents a comparative analysis of the passive component volumes of the proposed hybrid switched-capacitor converter and traditional boost converters. To validate the findings, a 150 W prototype was developed and tested. The prototype operates across an input voltage range of 40–60 V, stepping up to a stable output of 240 V, achieving a peak efficiency of 96.4% at an output power of 50 W and 94.7% at full load. This design achieves the theoretical expectations and shows promise for applications requiring high-efficiency and high-power density.