DRV8846_15 Datasheet, PDF (18/35 Pages) Texas Instruments – DRV8846 Dual H-Bridge Stepper Motor Driver

DRV8846
SLLSEK2 – JUNE 2014
PWM
ON
Slow Decay
PWM OFF (t_OFF)
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Fast Decay
Mixed Decay
25%
Mixed Decay
1 t_BLANK
25% of cycle
1 t_BLANK
Itrip
DEC1
0
0
0
Z
Z
Z
1
1
1
DEC0
0
Z
1
0
Z
1
0
Z
1
PWM CYCLE
Figure 8. Decay Behavior
Table 7. Decay Pins Configuration
Decay Mode (Increasing Current)
Slow decay
Slow decay
Slow decay
Mixed decay: 1 t_BLANK
Mixed decay: 50% fast
Mixed decay: 25% fast
Slow decay
Slow decay
Slow decay
Decay Mode (Decreasing Current)
Slow decay
Mixed decay: 25% fast
Mixed decay: 1 t_BLANK
Mixed decay: 1 t_BLANK
Mixed decay: 50% fast
Mixed decay: 25% fast
Mixed decay: 50% fast
Mixed decay: 12.5% fast
Fast decay
18
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