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4.VS驱动电路工作原理(续)U8011③脚输出的PWM脉冲经R8112限流后,加在由Q8019(C3209)、Q8020(A1281)组成的互补推挽电路的b极上,推动Q8004(W20NM50)进入开关状态。
4. PWM drive circuit works (continued) U8011 ③ pin output PWM pulse R8112 after the current limit, plus by Q8019 (C3209), Q8020 (A1281) consisting of complementary push-pull circuit on the b pole to promote Q8004 (W20NM50) Enter the switch state.