Electrical

Driving Power MOSFETs Without Shoot-Through

Electrical Diagrams · made in Skemio

Circuit diagram showing a 12V DC rail powering a motor load with a flyback diode, controlled via a gate-switched branch with pull-down resistor.
Circuit diagram showing a 12V DC rail powering a motor load with a flyback diode, controlled via a gate-switched branch with pull-down resistor.
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What it shows

  • Internal gate-source capacitance (Cgs) acts like a short during switching transitions.
  • A series gate resistor dampens high-frequency ringing and limits drive peak current.
  • A gate-to-source pull-down resistor prevents unintended turn-on when the MCU boots.

The takeaway

Treat the MOSFET gate as a capacitor: use a series resistor to stop ringing and a pull-down to prevent floating states.

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