DRV102 Datasheet, PDF (19/23 Pages) Burr-Brown (TI) – PWM SOLENOID/VALVE DRIVER

DRV102
On
Off
1
2
Delay
Adjust
+24V
5
V_S
V_Z
2kΩ
5.1V
Zener
6
Out
3
4
Duty Cycle
Adjust
Load
R_SHUNT
0.1Ω
25kΩ
100kΩ
1kΩ
Current Set
0.1µF
V_Z
100kΩ
0.1µF
OPA237
5kΩ
0.6V gives ~ 90% Duty Cycle
3.7V gives ~ 10% Duty Cycle
FIGURE 21. Constant Current Output Drive.
Phase 2
Stepper
Logic In
DRV102
Only one DRV102 is
turned on at sequence time.
5
V_S
V_S
5
6
6
DRV102
Phase 3
Stepper
Logic In
Motor
Phase 1
Stepper
Logic In
DRV102
5
V_S
6
FIGURE 22. Three-Phase Stepper Motor Driver Provides High-Stepping Torque.
V_S = +8V to +60V
Select R₁ and R₂ to divide
down V_S to 5.5V max.
For example: with V_S = 60V
R₁ = 11kΩ, R₂ = 1kΩ
V_IN =
1kΩ
• 60V = 5V
1kΩ + 11kΩ
DRV102
R₁
1
5
V_S
R₂
R₃
4.87kΩ
Sets start-up
duty cycle
2
C₁
20µF
Delay Adjust
+
4.3V
DIN5229
6
Out
3
4
Duty Cycle Adjust
after soft start
R₄
4.87kΩ
FIGURE 23. Soft-Start Circuit for Incandescent Lamps and Other Sensitive Loads.
DRV102
19
SBVS009A
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