DRV8848: BISEN when Bridge B is unused

Kei Kuwahara

Expert 5110 points

Part Number: DRV8848

Tool/software:

Hello team,

Should I connect BISEN pin to GND, when Bridge B is completely unused?

Best Regards,
Kei Kuwahara

1 month ago

+1 Karan Doshi 1 month ago

TI__Intellectual 1920 points

Hi Kuwahara-san,

Yes, you can do that. It wouldn't matter either ways since no current will pass through hence no power losses. Connecting an ISEN pin to GND will disable current regulation for that bridge. Let us know if you run into issues.

Regards,
Karan

0 Kei Kuwahara 1 month ago in reply to Karan Doshi

TI__Expert 5110 points

Hello Karan-san.

Thank you for your quick reply!

My customer is not using H Brige B, and when they left BISEN pin floating, FAULT was asserted.

Is floating ISEN pin, when that H Bridge is not used, cause FAULT?

Best Regards,
Kei Kuwahara

0 Karan Doshi 1 month ago in reply to Kei Kuwahara

TI__Intellectual 1920 points

Hi Kuwahara-san,

Correct. The data sheet specifies this in the pin description section.

Regards,
Karan

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DRV8848: BISEN when Bridge B is unused