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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/694

Title: Low output ripple DC-DC converter based on an overlapping dual asymmetric half-bridge topology
Authors: Liu, Joe C. P.
Poon, N. K.
Pong, Bryan M. H.
Tse, C. K. Michael
Subjects: DC-DC converter
Half-bridge converter
Low output ripple
Zero-current turnoff
Zero-voltage turnon
Issue Date: Sep-2007
Publisher: IEEE
Citation: IEEE transactions on power electronics, Sept. 2007, v. 22, no. 5, p. 1956-1963.
Abstract: A new converter topology is described for applications requiring very low output current ripple. The proposed converter consists of two asymmetric half-bridge converters whose output voltages overlap in a finite interval of time. This converter provides well regulated and smooth dc output without the need of an output filter. The output voltage is regulated by direct amplitude modulation. Unlike the standard interleaved converters, the proposed converter is robust to input voltage and operating duty cycle variations. Furthermore, equal current sharing is automatically achieved under all conditions, thus ensuring full utilisation of the output rectifiers for wide input and output ranges. The circuit achieves zero-voltage turnon for all primary switches and zero-current turnoff for the output rectifiers. An isolated dc-dc converter prototype with 5-V output voltage and 20-A output current has been built to verify the design.
Rights: © 2007 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.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holders.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/694
ISSN: 08858993
Appears in Collections:EIE Journal/Magazine Articles

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