This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8840: The I control pins to not change the output.

Part Number: DRV8840

I created a proto board based off the design in your datasheet document. I added 10K pullups to all of the digital inputs and applied 3.3v to the resistors to pull the pins high.

When I apply 24vdc to VM I get about 24vdc out.

If I ground all 5 of the I inputs the output goes to 0v. If I raise and of the I pins to 3.3v, the output goes directly to 24vdc.

The Phase input does reverse polarity, the Brake will coast or Brake the motor correctly. The Enable works correctly.

I measured the V3P3OUT and I'm getting 3.3vdc, but if I remove the external 3.3v from the pullups, the V3P3OUT no longer produces 3.3v. It is now 0vdc.

Has anyone witnessed these problems and what should I check/do for it?