DRV8323: Current sense amplifier outputs shift one side

daisuke kawasaki

Part Number: DRV8323

Hi expert,

After we peformed the auto offset calibration procedure, we are observing an one side offest shift for all current sense outputs (Sox) with +0.07V.

SOA=SOB=1.64V -> 1.71V

SOC=1.67 -> 1.74V

Confirmed that Vref is keeping same before/after auto offset calibration. Do you think this woud happen as a case?

Appreciate any assumption.

Thank you and best regards,

Daisuke KAWASAKI

over 6 years ago

0 Garrett Walker over 6 years ago

TI__Intellectual 2595 points

Hi Kawasaki-san,

What value is the VREF voltage? Are there any additional components connected to the SNx/SPx lines, or could you possibly share part of the schematic with the DRV8323?

Thanks,
Garrett

0 daisuke kawasaki over 6 years ago in reply to Garrett Walker

TI__Expert 4545 points

Hi Garrett-san,

Thank you for your reply. I will get back to you shortly. But I will be in offline.

Best regards,

Daisuke KAWASAKI

0 Adam Sidelsky over 6 years ago in reply to daisuke kawasaki

TI__Guru 66020 points

Kawasaki-San,

I need to close this thread due to inactivity. If you have another update or further question, please use the orange "Ask a related question" button at the top right.

Regards,

-Adam

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DRV8323: Current sense amplifier outputs shift one side