SLLU363 may 2023 MCF8315A
For applications that require preventing supply voltage overshoots during motor stop, it is recommended to select active spin down as Motor stop options. Active spin down can be used as a motor stop option in applications where fast stop is not required but some amount of inductive energy going back to power supply is acceptable
Active spin down
Step 1: Configure Motor stop options [MTR_STOP] to Active spin down
Step 2: Configure active spin down speed threshold [ACT_SPIN_THR]. It is recommended to set the [ACT_SPIN_THR] to 50% of the maximum speed. If there is voltage overshoot seen on the power supply, it is recommended to decrease the ACT_SPIN_THR till the voltage overshoot reaches acceptable limit.