SLOSE70 December 2020 DRV8434S
Mixed decay begins as fast decay for an initial duration of the tOFF, followed by slow decay for the remainder of the tOFF time. Mixed decay only occurs during decreasing current. Slow decay is used for increasing current.
This decay mode exhibits the same current ripple as slow decay mode does for increasing current, because for increasing current, only slow decay is used in this mode. For decreasing current, the ripple is larger than slow decay, but smaller than fast decay. On decreasing current steps, mixed decay settles to the new ITRIP level faster than slow decay.