DRV8889-Q1: UVLO Fault

Mark Philip Felipe

Part Number: DRV8889-Q1

Hi team, trying to run 3.3 V stepper motor with the DRV8889 and getting UVLO fault. Powering it with a 9V battery and am reading ~8V at Vm, which is well above the 4.5V min.

Do you have a similar encounter?

Thank you very much.

-Mark

over 3 years ago

0 Ryan Kehr over 3 years ago

TI__Guru 54675 points

Mark,

Can you please give me some more details on your setup? Is it your own design or an EVM from TI?

If own design, can you please share schematic.

Have you checked with an oscilloscope to see if the supply is dropping below 8V under load?

0 Ryan Kehr over 3 years ago in reply to Ryan Kehr

TI__Guru 54675 points

Mark,

Just wanted to follow-up again on this to see if there has been any progress.

0 Mark Philip Felipe over 3 years ago in reply to Ryan Kehr

TI__Genius 9705 points

Hi Ryan, my customer is using TI Board for this application. I am waiting for their measurements.

Thank you for supporting this post.

0 Ryan Kehr over 3 years ago in reply to Mark Philip Felipe

TI__Guru 54675 points

Mark,

OK. When responding, please also provide the revision of the board...should be a MDxxxxx label on it. If you can give me that label information, it would help me make sure it is the latest EVM. Also, revision of GUI they are using would also be helpful.

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DRV8889-Q1: UVLO Fault