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.
员翠平, 刘树林, 赵倩, 张少雄, 裴晋军. 功率PMOS管的有源泄放驱动电路研究[J]. 电工技术学报, 2019, 34(zk2): 528-533.
Yuan Cuiping, Liu Shulin, Zhao Qian, Zhang Shaoxiong, Pei Jinjun. Research of Drive Circuit with Active Discharging Technology for Power PMOS. Transactions of China Electrotechnical Society, 2019, 34(zk2): 528-533.
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2019, Vol. 34 
