Our customer has a question about the TI pre-driver: DRV83055QPHPRQ1.
On the board equipped with DRV83055QPHPRQ1 created in the past, the current detection accuracy becomes worse as the amount of current increases.
The reason is that the GND of the pre-driver and the GND of the microcontroller are different as shown in the attached (current).
(Because there is a GND potential difference, the detection accuracy deteriorates.)
Therefore, they are thinking of improving the accuracy of current detection by sharing the GND of the pre-driver and the microcontroller as shown in the attached(modify).
Is there any problem in using DRV83055QPHPRQ1?
They shouldn't do this kind of modify ?
Please give us know your advise.