Several boards were built with a 0-ohm OC-Adjust resistor value, which is outside the Recommended Operating Conditions (24k to 200K for CBC current limit modes) and have been running on the bench before the motor driver circuitry based on the DRV8432 was checked out. Upon checkout of the DRV8432 portion, we found that the device was immediately reporting a fault condition (the FAULT pin would go low when the PWM became active and it stayed low). Reworking one of the boards by replacing the 0-ohm with a 100k-ohm (2.8A OC threshold) did not correct the problem. However, making the change on a board that had not been powered and checking it out on the bench showed that the circuit worked.
Is it expected that initially powering the DRV8432 with a 0-ohm resistor would damage the part as we have experienced?
