DRV8328: Driving a brushed DC motor with DRV8328

Amy Domino

Part Number: DRV8328

Hello Motor Driver Team!

I would like to use the DRV8328D in 3 PWM mode to drive a 12V / 10A peak bdc motor. I have 2x PWM pins available to drive the motor, so I am planning connecting the inputs as shown:

INL1 : HIGH

INH1: LOW / PWM

INL2: HIGH

INH2: PWM / LOW

INL3: LOW

INH3: NC (ok to float?)

Is there any issue in leaving one of the 1/2 bridges high z like this?

over 3 years ago

0 Akshay Rajeev Menon over 3 years ago

TI__Mastermind 23276 points

Hey Amy

I will consult with my team and provide an answer before end of the week.

Best Regards,

Akshay

0 Akshay Rajeev Menon over 3 years ago

TI__Mastermind 23276 points

Hey Amy,

Thank you for your patience.

To prevent Bootstrap under-voltage protection from being triggered it is recommended to ground the INH3.

Here are my suggestions for the other pins relating to the phase you choose to float:

INL3: Ground

BST3: NC (Float)

GH3: NC (Float)

SH3: Ground

GL3: NC (Float)

I hope this resolves your issue. Please reach out if you have any more questions.

Best Regards,

Akshay

0 Akshay Rajeev Menon over 3 years ago

TI__Mastermind 23276 points

Hey Amy,

Just reaching out to ensure that your questions have been answered. Feel free to reach out if you have anymore questions.

If your question has been answered please mark the thread as resolved.

Best Regards,

Akshay

0 Akshay Rajeev Menon over 3 years ago

TI__Mastermind 23276 points

Hey Amy,

I am closing the thread, but feel free to reach out if you have any more questions.

Best Regards,

Akshay

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DRV8328: Driving a brushed DC motor with DRV8328