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DRV8353RS-EVM: DRV8353RS Gate driver

Deepak Prajapati
Prodigy 30 points
Part Number: DRV8353RS-EVM

Hi

I am using DRV8353RS gate driver for BLDC motor application.

From MCU I generated 6 PWM's  and given to respective pins of gate driver, also Enabled it.

nFAULT pin is also logic High which means no fault is there.

Then Why no pulses are coming at the out put of gate driver?

I have used default setting of gate driver for my application.

Thanks

Deepak

  • 0
    TI__Mastermind 18900 points

    Hello Deepak,

    You've mentioned most of the criteria for the INx signals to be translated to GHx and GLx signals. There's a couple more:

    • Enable is high
    • nFAULT is high
    • VDRAIN and VM > 8V
      • Resulting in VCP and VGLS > 7V, VDD > 4.5V
    • 0V or >VIH on INLx, with respective, 0V or >VIH on INHx

    To result in the GHx or GLx pin to toggle, no motor needed.

    As such, can you produce a waveform with INHx or INLx, corresponding GHx or GLx, VDRAIN, VCP or VGLS or DVDD, and ENABLE or nFAULT in various combinations to check the assumptions?

    If this scenario somehow fixes it, I suggest you take a look at the PWM_MODE and make sure it selected to be what you expect from the input and output logic.

    Best,

    -Cole