1. On Energy Efficiency of Switched-Capacitor Converters.
- Author
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Cheung, Chun-Kit, Tan, Siew-Chong, Tse, Chi K., and Ioinovici, Adrian
- Subjects
ENERGY consumption ,SWITCHED capacitor circuits ,CASCADE converters ,METAL oxide semiconductor field-effect transistors ,ELECTRIC discharges ,ELECTRIC resistors ,ENERGY dissipation - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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