A Family of Dual-Phase-Combined Zero-Current Switching Switched-Capacitor Converters

• Published in: IEEE transactions on power electronics Vol. 29; no. 8; pp. 4209 - 4218
• Main Authors: Yuanmao Ye, Cheng, Ka Wai Eric, Junfeng Liu, Cuidong Xu
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-08-2014; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Circuits; Conversion; Converters; DC-DC converter; Density; dual-phase; Electric potential; Electric power; Electrical engineering; Electrical equipment; resonant; Resonant frequency; Ripples; switched capacitor; Switches; Switching; Switching frequency; Topology; Voltage; Voltage control; Zero current switching; zero-current switching (ZCS)
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2013.2290733

A family of dual-phase-combined resonant switched-capacitor (SC) converters with a similar structure is presented in this paper. Comparing with their conventional single-phase version, each of the proposed dual-phase converters is more than just a switched capacitor but also provides the service of two phases operated in the fully complementary manner. This design provides a more stable output voltage with low ripple and significantly reduces the quantity of switches. These converters therefore have the common features of smaller size, lower cost, and higher power density than the conventional multiphase SC converters. With the zero-current switching technique, the proposed converters also possess high-power conversion efficiency. The detailed analysis of the circuit operation and voltage ripples is presented. Experimental results are also provided to confirm the performance of the new family of converters.