Hi there,
We are evaluating the DRV8323H for a new design. Each DRV will be driving 3 half-bridges which forms a part of 3 h-bridges. The other low side MOSFET has a separate low side driver, which needs a sense resistor between its source and ground for this application.
Thus, connecting the SPx and SNx pins as shown in the schematic (a) the low side VDS monitor will be compromised as it will include the voltage across Rsense.
We do not want to disable the VDS monitoring as we need the half-bridge VDS monitor for the high side.
We know that this problem can be avoided by using SPI in DRV8323S, but we do not want to deal with SPI.
The question is:
Is it possible to swap the SPx and SNx pins of the Current Sense Amplifiers across the sense resistor in such a manner that the Px will be connected to the ground (as shown in the schematic (b))?
Thank you in advance.