Analysis and Design of a High-Voltage-Gain Hybrid Switched-Capacitor Buck Converter

This paper presents an analysis on the effect of having different number of capacitorsnin the first-stage switched-capacitor circuit of an improved hybrid switched-capacitor buck converter for high-voltage-gain conversion. Various aspects of the topology, operation, and efficiency are investigated. It is shown both analytically and experimentally that a highernin the step-down capacitor stage does not necessarily lead to an overall improved power efficiency. A design and optimization method is thus proposed for the improved SC-buck converter.