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| DRV8880_15 Datasheet, PDF (25/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™ | |||
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7.3.5.5 Mode 5: Fast Decay for Increasing and Decreasing Current
ITRIP
DRV8880
SLVSD18A â JUNE 2015 â REVISED JULY 2015
tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
tOFF
ITRIP
tBLANK
tDRIVE
tOFF
tBLANK
tDRIVE
tOFF
Figure 20. Fast/Fast Decay Mode
tBLANK
tDRIVE
tOFF
During fast decay, the polarity of the H-bridge is reversed. The H-bridge will be turned off as current approaches
zero in order to prevent current flow in the reverse direction.
Fast decay exhibits the highest current ripple of the decay modes for a given tOFF. Transition time on decreasing
current steps is much faster than slow decay since the current is allowed to decrease much faster.
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: DRV8880
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