Paper Title:
288 V-10 V DC- DC Converter Application Using AlGaN/GaN HFETs
  Abstract

We report on the 288 V-10 V DC- DC converter circuit using AlGaN/GaN HFETs for the first time. The AlGaN/GaN HFET with a large current and a high breakdown voltage operation was fabricated. That is, the maximum drain current was over 50 A, and the minimum on-resistance was 70 mohm. The breakdown voltage was over 600 V. A DC-DC down-converter from input DC 288 V to output DC 10 V was fabricated using these HFETs. It was confirmed that the switching speed of the AlGaN/GaN HFET was faster than that of Si MOSFET. The DC-DC down-converter was fabricated using these HFETs. This converter was composed of a full bridge circuit using four n-channel AlGaN/GaN HFETs. In the case of AlGaN/GaN HFET, a gate switching wave (Vgs) and source-drain wave (Vds) were abrupt compared with those of using Si MOSFETs. In both cases, a stable and constant output DC 10V was also obtained and the conversion efficiency of the converters with AlGaN/GaN HFETs was 84%.

  Info
Periodical
Materials Science Forum (Volumes 600-603)
Edited by
Akira Suzuki, Hajime Okumura, Tsunenobu Kimoto, Takashi Fuyuki, Kenji Fukuda and Shin-ichi Nishizawa
Pages
1321-1324
DOI
10.4028/www.scientific.net/MSF.600-603.1321
Citation
S. Yoshida, M. Masuda, Y. Niiyama, J. Li, N. Ikeda, T. Nomura, "288 V-10 V DC- DC Converter Application Using AlGaN/GaN HFETs", Materials Science Forum, Vols. 600-603, pp. 1321-1324, 2009
Online since
September 2008
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Price
$32.00
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