Transactions of China Electrotechnical Society  2021, Vol. 36 Issue (20): 4185-4193    DOI: 10.19595/j.cnki.1000-6753.tces.L90138
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Resonant Gate Driver with Asymmetrical Voltage and Two Synchronous Drive Signals for GaN Switches
Gao Shanshan, Wang Yijie, Liu Yining, Xu Dianguo
Department of Electrical Engineering Harbin Institute of Technology Harbin 150001 China

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Abstract  Commercial gallium nitride (GaN) switches are widely used in power electronic converters recently years due to their advantages such as fast switching speed and low turn-on resistance. Accordingly, resonant gate drivers are adopted to reduce drive loss in high frequency and low power applications. However, different from Si switches, the turn-on threshold voltage of GaN switches is quite low and GaN switches have no body diode, which causes large reverse voltage drop. Therefore, traditional resonant gate drivers are not suitable for GaN switches. In order to solve the drive signal oscillation caused by parasitic parameters in high frequency applications, a resonant gate driver with asymmetrical voltage is proposed in this paper. Besides, for applications that require two synchronous switches, such as switch inductor converters, a transformer with two groups of secondary sides is added. The working principles are presented and parameters are optimized for lower loss. A 1MHz prototype is designed for experimental verification. The experimental results are in good agreement with the theoretical analysis.
Key wordsGaN      GaN      resonant gate driver      resonant gate driver      resonant inductor      resonant inductor      loss analysis      loss analysis     
Received: 30 June 2020     
PACS: TM46  
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Gao Shanshan
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Liu Yining
Xu Dianguo
Xu Dianguo
Cite this article:   
Gao Shanshan,Gao Shanshan,Wang Yijie等. Resonant Gate Driver with Asymmetrical Voltage and Two Synchronous Drive Signals for GaN Switches[J]. Transactions of China Electrotechnical Society, 2021, 36(20): 4185-4193.
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