DocumentCode :
3390195
Title :
A new visit to an old problem in switched-capacitor converters
Author :
Cheung, Chun-Kit ; Tan, Siew-Chong ; Lai, Y.M. ; Tse, Chi K.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong, China
fYear :
2010
fDate :
May 30 2010-June 2 2010
Firstpage :
3192
Lastpage :
3195
Abstract :
The energy-efficiency issue of the switched-capacitor converters is still a highly controversial topic that requires a more in-depth exploration. This paper will address the issue by dissecting the analysis of the entire efficiency problem into two parts. In the first part, the efficiency analysis of charging the capacitor of an RC circuit under different aspects (partial charging, full charging, at zero capacitor voltage, at non-zero capacitor voltage, etc.) will be conducted. In the second part, the efficiency analysis of discharging the capacitor of an RC circuit with resistive and capacitive loads will be covered. A complete evaluation of the overall efficiency is then performed in terms of both the charging and discharging efficiencies of the capacitor. Additionally, it is shown in this paper that the claim that quasi-switched-capacitor converters are more lossy than switched-capacitor converters is a common misconception.
Keywords :
RC circuits; convertors; switched capacitor networks; RC circuit; efficiency analysis; energy efficiency; full charging; nonzero capacitor voltage; partial charging; quasiswitched-capacitor converters; Energy efficiency; MOSFETs; Performance evaluation; Power engineering and energy; Resistors; Switched capacitor circuits; Switching circuits; Switching converters; Virtual colonoscopy; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
Type :
conf
DOI :
10.1109/ISCAS.2010.5537944
Filename :
5537944
Link To Document :
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