DRV8886AT: Auto Tune Ripple Control

NAOKI AOYAMA

Guru 11215 points

Part Number: DRV8886AT

Hello,

Our customer use the DRV8886AT, have some questions about Auto Tune Ripple Control.

Could you tell me the level of IVALLEY?

I think that IVALLEY is xx% less than ITRIP. The customer want to know "xx%".

The customer have another question about application curves Fig.30 on the datasheet.

There are a lot of ripple noise. Does it really using Auto Tune Ripple Control?

Best Regards,

Naoki Aoyama

over 8 years ago

0 Rick Duncan over 8 years ago

TI__Guru** 114905 points

Hi Aoyama-san,

We will investigate and reply soon.

0 Rick Duncan over 8 years ago in reply to Rick Duncan

TI__Guru** 114905 points

Hi Aoyama-san,

IVALLEY is approximately 90% of ITRIP.

Yes this is ripple control. Depending on the speed of the motor, the BEMF can cause the current regulation to be a little higher during decreasing steps.

0 NAOKI AOYAMA over 8 years ago in reply to Rick Duncan

Guru 11215 points

Hi Rick-san,

Thank you for your reply.
I understood the Fig.30 is ripple control.

Thanks,
Naoki Aoyama

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DRV8886AT: Auto Tune Ripple Control