SLLSFH8A August 2021 – December 2021 MCT8316A
In MCT8316A, the degauss time can be dynamically computed after the commutation for a precise detection of the zero crossing instant. This is done by enabling the dynamic degauss feature (DYN_DEGAUSS_EN is set to 1b). This feature allows the motor control algorithm to capture the zero crossing instant after the outgoing (floating) phase voltage is completely settled; that is, when the outgoing phase current has decayed to zero and the outgoing (floating) phase voltage is not clamped (to either VM or PGND) and represents the true back-EMF. This accurate measurement of zero cross instant allows fast acceleration of the motors (< 50ms) using MCT8316A.