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

Author

Xiong, Song ; Tan, Siew-Chong ; Wong, Siu-Chung

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China

Volume

59

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

1132

Lastpage

1141

Abstract

This paper presents an analysis on the effect of having different number of capacitors n in 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 higher n in 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.

Keywords

optimisation; power convertors; switched capacitor networks; first-stage switched-capacitor circuit; high-voltage-gain conversion; high-voltage-gain hybrid switched-capacitor buck converter; improved power efficiency; optimization method; step-down capacitor stage; Capacitors; Equivalent circuits; Switches; Switching frequency; Switching loss; Topology; Voltage control; High voltage gain converter; hybrid switch-capacitor buck converter;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2012.2191313

Filename

6180016