SLLSFH8A August 2021 – December 2021 MCT8316A
Active spin down mode is configured by setting MTR_STOP to 100b. When motor stop command is received, MCT8316A reduces duty cycle to ACT_SPIN_BRK_THR and then transitions to Hi-Z state by turning all MOSFETs OFF. The advantage of this mode is that by reducing duty cycle, the motor is decelerated to a lower speed thereby reducing the phase currents before entering Hi-Z. Now, when motor transitions into Hi-Z state, the energy transfer to power supply is reduced. The threshold ACT_SPIN_BRK_THR needs to configured high enough for MCT8316A to not lose synchronization with the motor.