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| Research of Drive Circuit with Active Discharging Technology for Power PMOS |
| Yuan Cuiping, Liu Shulin, Zhao Qian, Zhang Shaoxiong, Pei Jinjun |
| School of Electrical and Control Engineering Xi’an University of Science & Technology Xi’an 710054 China |
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Abstract The switching characteristic of power PMOS is analyzed and a active discharging drive circuit is proposed. The gate-source parasitic capacitor was charged and discharged quickly during the power PMOS turn on and turn off transient through paralleling the switching circuit between the gate and the source electrode of power PMOS, which made the power PMOS turn on and off quickly. Moreover, the charging-discharging of parallel capacitor was controlled by PWM signal. Combined with the proposed drive circuit, the power PMOS turn-on and turn-off process was detailed analyzed, and the selection methods of the main components in this drive circuit were obtained. The proposed driving circuit is applied to the Buck converter, and experiment results show that the proposed circuit and theoretical analysis are valid and feasible.
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Received: 01 July 2018
Published: 02 January 2020
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Corresponding Authors:
国家自然科学基金项目（51777167,51604217）和陕西省技术创新引导专项计划项目（2017CGZH-XN/GJ-09）资助
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2019, Vol. 34 
