Title :
Development of a switched-capacitor DC-DC converter with bidirectional power flow
Author :
Chung, Henry S H ; Chow, W.C. ; Hui, S.Y.R. ; Lee, Stephen T S
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fDate :
9/1/2000 12:00:00 AM
Abstract :
This brief presents a switched-capacitor dc-dc converter that offers features of voltage step-down, voltage step-up, and bidirectional power flow. Concept of energy transfer is achieved by using two current-controlled bidirectional converter cells, which operate in antiphase. Good regulation capability and continuous input current waveform are other substantial advantages that facilitate practical realization and reduce electromagnetic interference with other circuits and supply networks. State-space averaging technique is applied to study the static and dynamic characteristics. A 20-W, 5-V-9-V prototype has been built and has an overall efficiency of over 80% in all operations.
Keywords :
DC-DC power convertors; electromagnetic interference; load flow; state-space methods; switched capacitor networks; 20 W; 5 to 9 V; 80 percent; bidirectional power flow; continuous input current waveform; current-controlled bidirectional converter cells; dynamic characteristics; electromagnetic interference; energy transfer; overall efficiency; regulation capability; state-space averaging technique; static characteristics; switched-capacitor DC-DC converter; voltage step-down; voltage step-up; Bidirectional power flow; Capacitors; Circuits; DC-DC power converters; Electromagnetic interference; Power conversion; Power semiconductor switches; Prototypes; Switching converters; Voltage;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
