Driving circuit for suppressing threshold voltage drift in silicon carbide MOSFETs
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State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, P. R. China

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TN 386

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    Abstract:

    Threshold voltage drift in silicon carbide metal-oxide-semiconductor field-effect transistors (MOSFETs) poses a significant challenge to device reliability in practical applications. This paper reviews the characteristics and existing theoretical models of threshold voltage drift in silicon carbide MOSFETs and proposes a novel gate driving method and circuit to mitigate this issue. The proposed circuit differentiates the device’s turn-off dynamic process from the post turn-off gate voltage by introducing an intermediate voltage level, thereby effectively suppressing threshold voltage drift while retaining the benefits of a negative gate turn-off voltage. An experimental platform was constructed to evaluate the proposed driving circuit. Experimental results indicate that, under the specified conditions, the new circuit reduces threshold voltage drift by 37% compared to conventional driving methods.

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赵柯,蒋华平,汤磊,钟笑寒,谢宇庭,胡浩伟,肖念磊,黄诣涵,刘立.抑制碳化硅MOSFET阈值电压漂移的驱动电路[J].重庆大学学报,2025,48(9):50~56

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History
  • Received:October 05,2023
  • Revised:
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  • Online: October 13,2025
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