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Five-Megahertz PWM-Controlled Current-Mode Resonant DC–DC Step-Down Converter Using GaN-HEMTs


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タイトル: Five-Megahertz PWM-Controlled Current-Mode Resonant DC–DC Step-Down Converter Using GaN-HEMTs
著者: Hariya, Akinori / Matsuura, Ken / Yanagi, Hiroshige / Tomioka, Satoshi / Ishizuka, Yoichi / Ninomiya, Tamotsu
発行日: 2015年 7月
出版者: IEEE
引用: IEEE Transactions on Industry Applications, 51(4), pp.3263-3272; 2015
抄録: High power efficiency and high power density are required in regulated isolated dc-dc converters. In this paper, a novel pulsewidth modulation (PWM) control method that is suitable for an isolated current-mode resonant dc-dc converter operated at a megahertz-level switching frequency is proposed. The output voltage with the proposed method can be regulated with no additional components at a fixed switching frequency. In addition, the zero-voltage switching (ZVS) of primary-side switches at turn on can be maintained. The principle of the proposed method and the method of the ZVS operation in the proposed method are explained. Some experiments have been performed with a 5-MHz isolated step-down dc-dc converter using gallium nitride high-electron-mobility transistors; the output voltage is 12 V, and the total volume of the circuit is 16.14 cm3. With the proposed PWM control method, the input voltage range is 42-45.5 V, and the maximum load current range is 10 A at Vi = 45.5 V. The ZVS of the primary-side switches at turn on is confirmed in all experimental regions, and the maximum power efficiency is 89.2%.
キーワード: DC-DC power converters / Gallium nitride / Pulse width modulation converters / Switching converters / Zero voltage switching
URI: http://hdl.handle.net/10069/36007
ISSN: 00939994
DOI: 10.1109/TIA.2015.2391439
権利: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
資料タイプ: Conference Paper
原稿種類: author
出現コレクション:060 会議発表資料

引用URI : http://hdl.handle.net/10069/36007

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