Datasheet

DRV102
19
SBVS009B
www.ti.com
FIGURE 22. Three-Phase Stepper Motor Driver Provides High-Stepping Torque.
FIGURE 23. Soft-Start Circuit for Incandescent Lamps and Other Sensitive Loads.
FIGURE 21. Constant Current Output Drive.
DRV102
1
34
R
2
V
S
= +8V to +60V
R
1
R
3
4.87kΩ
R
4
4.87kΩ
C
1
20µF
+
4.3V
DIN5229
Duty Cycle Adjust
after soft start
Select R
1
and R
2
to divide
down V
S
to 5.5V max.
For example: with V
S
= 60V
R
1
= 11kΩ, R
2
= 1kΩ
V
IN
= • 60V = 5V
Sets start-up
duty cycle
1kΩ
1kΩ + 11kΩ
5
V
S
6
Out
2
Delay Adjust
DRV102
Phase 3
Stepper
Logic In
6
5
V
S
DRV102
Phase 2
Stepper
Logic In
6
5
V
S
DRV102
Phase 1
Stepper
Logic In
6
5
Motor
Only one DRV102 is
turned on at sequence time.
V
S
+24V
On
Off
Duty Cycle
Adjust
Delay
Adjust
V
Z
Load
R
SHUNT
0.1Ω
DRV102
32
1
5
Current Set
0.6V gives ~ 90% Duty Cycle
3.7V gives ~ 10% Duty Cycle
Out
6
4
V
S
V
Z
2kΩ
100kΩ
25kΩ
5.1V
Zener
1kΩ
100kΩ
5kΩ
OPA237
0.1µF
0.1µF