Nonisolated Flyback Switching Capacitor Voltage Regulator

Author

Ke Jin ; Ling Gu ; Wenjing Cao ; Xinbo Ruan ; Ming Xu

Author_Institution

Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

28

Issue

8

fYear

2013

fDate

Aug. 2013

Firstpage

3714

Lastpage

3722

Abstract

This paper proposes a novel nonisolated flyback switching capacitor voltage regulator. The converter is a combination of a switching capacitor converter and a pulsewidth modulation voltage regulator, and it has the following advantages: 1) the switches achieve zero voltage switching (ZVS); 2) the self-driven method of the synchronous rectifier (SR) is applied to save the drive loss and the body diode conduction loss; 3) the transformer leakage inductor is utilized to realize the soft switching of the switches; and 4) single-phase option makes it more flexible. Its derivation, operation principle, and self-driven method are presented. A single-phase 700 kHz 1.2 V/35 A output point-of-load prototype was built to verify the analysis.

Keywords

capacitor switching; capacitors; rectifiers; transformers; voltage regulators; zero voltage switching; SR; ZVS; body diode conduction loss; current 35 A; frequency 700 kHz; nonisolated flyback switching capacitor voltage regulator; pulsewidth modulation voltage regulator; single-phase output point-of-load prototype; soft switching; switching capacitor converter; synchronous rectifier; transformer leakage inductor; voltage 1.2 V; zero voltage switching; Capacitors; Inductors; Regulators; Switches; Voltage control; Windings; Zero voltage switching; Pulsewidth modulation (PWM) converter; self-driven; switching capacitor converter; zero voltage switching (ZVS);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2012.2227824

Filename

6353947