ZHCSOS0C august 2021 – june 2023 MCF8316A
PRODUCTION DATA
MCF8316A estimates back-EMF in order to run motor optimally in closed loop. This estimated back-EMF is compared against the expected back-EMF calculated using the estimated speed and the BEMF constant. Whenever motor is stalled the estimated back-EMF is inaccurate due to lower back-EMF at low speed. When the difference between estimated and expected back-EMF exceeds ABNORMAL_BEMF_THR, an abnormal BEMF fault is triggered and action is taken according to the MTR_LCK_MODE.
ABN_BEMF lock can be enabled/disabled by LOCK2_EN.