SLLSFH8A August 2021 – December 2021 MCT8316A
Coast (Hi-Z) mode is configured by setting MTR_STOP to 000b. When motor stop command is received, the MCT8316A will transition into a high impedance (Hi-Z) state by turning off all MOSFETs. When the MCT8316A transitions from driving the motor into a Hi-Z state, the inductive current in the motor windings continues to flow and the energy returns to the power supply through the body diodes in the MOSFET output stage (see example Figure 8-40).
In this example, current is applied to the motor through the high-side phase-A MOSFET (HSA) and returned through the low-side phase-C MOSFET (LSC). When motor stop command is received all 6 MOSFETs transition to Hi-Z state and the inductive energy returns to supply through body diodes of MOSFETs LSA and HSC.