Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14536
Title: On energy efficiency of switched-capacitor converters
Authors: Cheung, CK
Tan, SC
Tse, CK 
Ioinovici, A
Keywords: Charging efficiency
discharging efficiency
flying capacitor
full charging
full discharging
partial charging
partial discharging
quasi-switched-capacitor (QSC) converter
switched-capacitor (SC) converter
Issue Date: 2013
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on power electronics, 2013, v. 28, no. 2, 6218201, p. 862-876 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: The energy-efficiency issue of switched-capacitor converters is still a controversial topic that requires a more in-depth discussion. In this paper, we address the issue by dividing the analysis of the entire efficiency problem into two parts. In the first part, the efficiency of a capacitor-charging RC circuit under different aspects (partial charging, full charging, at zero capacitor voltage, at nonzero capacitor voltage, etc.) will be conducted. The efficiency analysis of a capacitor-discharging RC circuit with a resistor, capacitor, and paralleled resistor-capacitor loads will be covered. A complete evaluation of the overall efficiency is then performed in terms of both the charging and discharging efficiencies. Based on the analysis, some design rules useful for developing high-efficiency switched-capacitor converters is suggested. Additionally, it is shown that the belief that quasi-switched-capacitor converters are more lossy than switched-capacitor converters is a common misconception.
URI: http://hdl.handle.net/10397/14536
ISSN: 0885-8993
EISSN: 1941-0107
DOI: 10.1109/TPEL.2012.2204903
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