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DRV8323: Drive MOS burnt out

Part Number: DRV8323

Tool/software:

During the debugging of this circuit, if it runs for a period of time, there may be MOS burnout. Even if different brands of MOS are replaced or MOS with higher voltage resistance is used, there is no improvement. Please help analyze the reasons and provide some suggestions

MotorDrv2_L.pdf

  • Zhang,

    Which IDRIVE settings have you tried, I reviewed the FDD86369_F085 datasheet and the Qg of this FET is quite small so small IDRIVE should be used.

    Do you have waveforms showing the external MOSFET Vgs and Vds?

    Regards,

    -Adam