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DRV8889-Q1 Datasheet(PDF) 25 Page - Texas Instruments

Part No. DRV8889-Q1
Description  DRV8889-Q1, DRV8889A-Q1 Automotive Stepper Driver with Integrated Current Sense, 1/256 Micro-Stepping, and Stall Detection
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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DRV8889-Q1 Datasheet(HTML) 25 Page - Texas Instruments

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7.3.6.2 Slow Decay for Increasing Current, Mixed Decay for Decreasing Current
ITRIP
ITRIP
tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
tFAST
tBLANK
tOFF
tFAST
tDRIVE
tBLANK
tDRIVE
tOFF
tOFF
tBLANK
tDRIVE
Figure 7-9. 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.
www.ti.com
DRV8889-Q1
SLVSEE9C – APRIL 2020 – REVISED AUGUST 2020
Copyright © 2020 Texas Instruments Incorporated
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