DRV8320: Customer want use this in a stepper, is it ok?

Minghao Yin

Prodigy 365 points

Part Number: DRV8320

Hi team,

My customer is going to use this device in a stepper. The stepper is a Lens drive motor inside automotive lidar.

They will only use two half bridge. Is it OK? Is there any other customer use like that?

6 months ago

0 Yara Al Shami 6 months ago

TI__Expert 6695 points

Hi Minghao,

We have a reference design using one of our BLDC drivers as a stepper:

https://www.ti.com/lit/ug/tiducn7/tiducn7.pdf?ts=1709090003917&ref_url=https%253A%252F%252Fwww.google.com%252F

This E2E I believe also addresses your question:

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/682671/bldc-motor-as-a-stepper?tisearch=e2e-sitesearch&keymatch=drv8320%2520AND%2520stepper#

Let me know if this was any help

Regards,

Yara

0 Minghao Yin 6 months ago in reply to Yara Al Shami

TI__Prodigy 365 points

There is something different with your example.

In your case, there is a 3-phase stepper. But customer only use 2-phase stepper in their system.

They want a stepper driver with FET and out 6A max.

So how to deal the third phase? Float or connect to a pull-down resistor? Or the DRV8320 not support this kind of use.

+1 Yara Al Shami 6 months ago in reply to Minghao Yin

TI__Expert 6695 points

Hi Minghao,

DRV8320 can be used in stepper applications, even two phases. For any unused phases please refer to this FAQ. It will tell you what to do with each pin of the unused phase:

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1176539/faq-quick-guide-to-debugging-common-issues-in-bldc-motor-drivers

0 Minghao Yin 6 months ago in reply to Yara Al Shami

TI__Prodigy 365 points

OK, it could solve customer question. Thanks a lot.

0 Yara Al Shami 6 months ago in reply to Minghao Yin

TI__Expert 6695 points

No Problem!

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DRV8320: Customer want use this in a stepper, is it ok?