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DRV8323R: DRV8323RH - PWM mode logic??

Intellectual 360 points

Replies: 3

Views: 498

Part Number: DRV8323R

Hi,

I have designed motor driver with DRV8323RH and 1xPWM mode is used.

I have thinked driver works well because motor rotates well.

But I found a strange things recently.

So I check them with BOOSTXL-DRV8323RH with TI GUI.

when GHA is pwm, GHB and GHC should low in the logic table.

But, GHB is low and GLB is low.

GHC is high and GLC is low(<-- strange)

so MOT_C is VM,

I attached the signal and experimet set-up

Could you check this?

I think it is related to previous question.(https://e2e.ti.com/support/motor-drivers/f/38/t/723387)

<experiment set up> hall sensor is connected and motor ABC wire is not connected.



GHA(YELLOW), GHB(CYAN), GLB(MAGENTA)

GHA(YELLOW), GHC(CYAN), GLC(MAGENTA)

MOT_A(YELLOW),  MOT_B(CYAN), MOT_C(MAGENTA)

TI EVM GUI (10% duty is applied, VM is 30V)

3 Replies

  • Hello,

    We will look further into this point and get back to you.

     

    Hector Hernandez
    Motor Applications Team

  • Min-Su,

    Why do you have the halls connected but not the motor?

    Regards,

    -Adam
  • In reply to Adam Sidelsky:

    Adam,

    I want check the gate signals with hall signals.

    It is good to remain the hall state to check signals.

    So I didn't connect motor power line.

    If I connect the motor, It rotates well.

    Thank you.

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