DRV101 Datasheet, PDF (14/19 Pages) Burr-Brown (TI) – PWM SOLENOID/VALVE DRIVER

APPLICATION CIRCUITS
Microprocessor
+5V
Pinch Valve
5kΩ
Flexible Tube
Flag
V_S (+9V to +60V)
7
5
Plunger
Thermal Shutdown
Over/Under Current
TTL Control Input 1
24kHz
Oscillator
PWM
On
Delay
Off
2
3
Delay
Adjust
C_D R_PWM
DRV101
Duty Cycle Adjust⁽¹⁾
(10% to 100%)
6
Solenoid Coil
Out
Can drive most types
of solenoid-actuated
Gnd
valves and actuators
4
NOTE: (1) Duty cycle can be programmed by
a resistor, analog voltage, or D/A converter.
Do not drive below 0.1V.
FIGURE 13. Fluid Flow Control System.
V_S
Brighter light results in
increased duty cycle
5
DRV101
6
On/Off
4
Lamp
Aimed at
λ ambient
light
10kΩ
Cadmium Sulfide
Optical Detector
(Clairex CL70SHL
or CLSP5M)
FIGURE 14. Instrument Light Dimmer Circuit.
V_S
5
DRV101
6
(1)
Coil
Input
1
(On/Off)
4
4-20mA
3
100Ω
Duty Cycle Adjust
187Ω
NOTE: (1) Rectifier diode required for inductive
loads to conduct load current during the off cycle.
FIGURE 15. 4-20mA Input to PWM Output.
®
DRV101
14