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| DRV8886AT Datasheet, PDF (20/40 Pages) Texas Instruments – 2-A Stepper Motor Driver With Integrated Current Sense and AutoTune Technology | |||
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DRV8886AT
SLVSDO1 â JANUARY 2017
7.3.6.1 Mode 1: Slow Decay for Increasing Current, Mixed Decay for Decreasing Current
ITRIP
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tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
ITRIP
tBLANK
tDRIVE
tFAST
tOFF
tBLANK
tDRIVE
tFAST
tOFF
Figure 18. Slow-Mixed Decay Mode
Mixed decay begins as fast decay for a time, followed by slow decay for the remainder of the tOFF time. In this
mode, mixed decay only occurs during decreasing current. Slow decay is used for increasing current.
This mode exhibits the same current ripple as slow decay for increasing current, because for increasing current,
only slow decay is used. 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.
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