On Energy Efficiency of Switched-Capacitor Converters

被引：103

作者：

Cheung, Chun-Kit ^{[1
]}

Tan, Siew-Chong ^{[2
]}

Tse, Chi K. ^{[1
]}

Ioinovici, Adrian ^{[3
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect & Informat Engn, Kowloon, Hong Kong, Peoples R China

[2] Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam, Hong Kong, Peoples R China

[3] Holon Inst Technol, Holon, Israel

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2013年 / 28卷 / 02期

关键词：

Charging efficiency; discharging efficiency; flying capacitor; full charging; full discharging; partial charging; partial discharging; quasi-switched-capacitor (QSC) converter; switched-capacitor (SC) converter; DC-CONVERTER; DESIGN; MODULATION;

D O I：

10.1109/TPEL.2012.2204903

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：862 / 876

页数：15

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