1 Features
1• Integrated MOSFET With PWM to Control
Solenoid Current
– Integrated Sense Resistor for Regulating
Solenoid Current
• Fast Ramp-Up of Solenoid Current to Guarantee
Activation
• Solenoid Current is Reduced in Hold Mode for
Lower Power and Thermal Dissipation
• Peak Current, Keep Time at Peak Current, Hold
Current, and PWM Clock Frequency Can Be Set
Externally. They Can Also Be Operated at
Nominal Values Without External Components.
• Internal Supply Voltage Regulation
– Up to 28-V External Supply
• Protection
– Thermal Shutdown
– Undervoltage Lockout (UVLO)
– Maximum Ramp Time
– Optional STATUS Output
• Operating Temperature Range: –40ºC to 105ºC
• 8-Pin and 14-Pin TSSOP Package Options

2 Applications
• Electromechanical Drivers: Solenoids, Valves,
Relays
• White Goods, Solar, Transportation

3 Description
The DRV120 device is a PWM current driver for
solenoids. The device is designed to regulate the
current with a well-controlled waveform to guarantee
activation and to reduce power dissipation at the
same time. The solenoid current is ramped up fast to
ensure opening of the valve or relay. After the initial
ramping, solenoid current is kept at peak value to
ensure the correct operation, after which it is reduced
to a lower hold level in order to avoid thermal
problems and reduce power dissipation.
The peak current duration is set with an external
capacitor. The current ramp peak and hold levels, as
well as PWM frequency, can independently be set
with external resistors. External setting resistors can
also be omitted, if the default values for the
corresponding parameters are suitable for the
application.
The DRV120 can operate from an external 6-V to
28-V supply.