Design of MOSFET gate driver circuit with negative voltage stability
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摘要: 设计了一款用于全固态Marx发生器的半导体开关驱动电路。该驱动电路输出侧采用储能电容与P-N双MOSFET管结构，可完成对固态Marx脉冲发生器功率回路开关管快速同步的导通关断控制，并具有死区时间调节与负压关断功能。此外，该驱动电路配合串芯磁环二次侧反向接线方案，可实现用同一信号对功率回路充、放电两路开关管的控制。实验证明，采用该款驱动电路的半桥型全固态Marx脉冲发生器可稳定输出幅值24 kV的脉冲方波，输出脉宽可在300 ns～10 μs之间自由调节，上升沿和下降沿均在40 ns以内。
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关键词:
- 固态Marx驱动电路 /
- 负压偏置 /
- 快速导通 /
- 纳秒脉冲
Abstract: A drive circuit for solid-state high-voltage Marx pulser generator is designed, and the output side of the drive circuit adopts energy storage capacitor and P-N-MOS structure, which can complete the synchronization, fast turning on and turnin off control of the power MOSFET in the power circuit of the solid-state pulse generator, and has the functions of dead-time adjustment and negative voltage bias. In addition, the drive circuit is combined with the scheme of reverse wiring on the secondary side of the core-piercing magnetic ring to realize the control of two power MOSFETs of charging and discharging in the power loop using the same signal. Experiments show that the solid-state Marx pulse generator using this drive circuit can output a pulse square wave with a stable amplitude of 24 kV, and the output pulse width can be freely adjusted between 300 ns and 10 μs, and the rising and falling edges are within 40 ns. -
图 1 全固态 Marx 脉冲发生器的基本结构
Figure 1. Basic structure of an all-solid-state Marx pulse generator
图 2 on/off 控制信号与驱动电路工作示意图
Figure 2. On/off control signal and driving circuit working diagram
图 5 全桥控制模块产生多个 off 脉冲
Figure 5. Full-bridge control module generates multiple off-signal pulses
图 7 放电功率开关管栅极控制信号上升沿
Figure 7. Rising edge of the discharged MOSFET gate control signal
图 8 具有负压偏置 24 kV、1 kHz、300 ns 空载脉冲输出波形
Figure 8. No-load pulse output waveform with negative bias 24 kV, 1 kHz, 300 ns
图 9 24 kV、1 kHz、300 ns 连续高重复脉冲波形
Figure 9. 24 kV, 1 kHz, 300 ns continuous high repetition pulse waveforms
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