SLVSCP6H July 2014 – June 2020 DRV10983
The lock detection current limit function provides a configurable threshold for limiting the current to prevent damage to the system. This is often tripped in the event of a sudden locked rotor condition. The DRV10983 continuously monitors the current in the low-side drivers as shown in Figure 30. If the current goes higher than the threshold configured by the HWiLimitThr[2:0] bits, then the DRV10983 stops driving the motor by placing the output phases into a high-impedance state. The MtrLck bit is set and a lock condition is reported. It retries after tLOCK_OFF.
Set the lock detection current limit to a higher value than the acceleration current limit.