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Title: Development of multiple output operation based on single stage switched-capacitor resonant converters
Authors: Cheng, KWE 
Law, KK
Yeung, YPB
Sutanto, D
Cheng, KWD
Issue Date: 2002
Source: PESC'02 : 2002 IEEE 33rd Annual Power Electronics Specialists Conference : conference proceedings : Cairns, Queensland, Australia, June 23-27, 2002, p. 1325-1330
Abstract: Power converters are commonly based on the Switched Mode techniques which use pulse-width modulation to control the converters. Switching loss and switching noise restrict high frequency operation such as more than 200kHz. Resonant converter is a solution of the above problem. The resonant converter enables switching devices to operate under zero-current or zero-voltage switching. The main disadvantage is that the parasitic effect is very difficult to handle and the transistors may not work at zero-voltage/current switching through the whole range of operation. A family of switched-capacitor circuits using two transistors is presented to overcome the above problems. This family only requires very small inductor for resonance and therefore is suitable for hybridization. It has variable topologies, which provide different voltage conversion ratios. Each of the topology can be merged to produce multiple outputs easily that is very difficult to perform when classical switched-mode or resonant converters are used. This paper investigates the feasibility of this circuit merger technique. Experimental and theoretical analyses are presented. Results confirmed that the converter operated under zero-current switching. The circuit is simple and multiple outputs can be obtained by simply connecting the switching capacitor states together. Experimental results have confirmed that the converter can produce high conversion efficiency. This paper will present the double inverting, double step-up, and inverting and step-up circuits.
Keywords: Capacitors
Circuit resonance
Current voltage characteristics
Electric inductors
Electric losses
Electric network topology
Electric power supplies to apparatus
Pulse width modulation
Resonant circuits
Spurious signal noise
Publisher: IEEE
ISBN: 0-7803-7262-X
Rights: © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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