ZHCSEP5D January 2016 – November 2018 DRV8884
PRODUCTION DATA.
The DRV8884 supports three different decay modes: slow decay, slow/mixed and all mixed decay. The current through the motor windings is regulated using an adjustable fixed-time-off scheme. This means that after any drive phase, when a motor winding current has hit the current chopping threshold (ITRIP), the DRV8884 will place the winding in one of the three decay modes for tOFF. After tOFF, a new drive phase starts.
The blanking time tBLANK defines the minimum drive time for the PWM current chopping. ITRIP is ignored during tBLANK, so the winding current may overshoot the trip level.