1 Features
1• Internal Zener Diode on Supply Pin for High-
Voltage Operation
– 120- and 230-V AC Supply Through Rectifier
and RS Resistor
– 24-V, 48-V, and Higher DC Supply Through RS
Resistor
• Drives an External MOSFET With PWM to Control
Solenoid Current
– External Sense Resistor for Regulating
Solenoid Current
• Fast Ramp-Up of Solenoid Current to Ensure
Activation
• Solenoid Current is Reduced in Hold Mode for
Lower Power and Thermal Dissipation
• Ramp 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.
• Protection
– Thermal Shutdown
– Undervoltage Lockout (UVLO)
• Optional STATUS Output
• Operating Temperature Range: –40ºC to +125ºC
• 8-Pin and 14-Pin TSSOP Package Options

2 Applications
• Electromechanical Drivers: Solenoids, Valves,
Relays, Contactors, Switchgear, Pneumatics
• White Goods, Solar, Transportation, Smart Grid,
Power Distribution

3 Description
The DRV110 device is a PWM current controller for
solenoids. The device is designed to regulate the
current with a well-controlled waveform to reduce
power dissipation. The solenoid current is ramped up
fast to ensure opening of the valve or relay. After
initial ramping, the solenoid current is kept at a peak
value to ensure correct operation, after which the
current is reduced to a lower hold level to avoid
thermal problems and reduce power dissipation.
The peak current duration is set with an external
capacitor. The peak and hold levels of the current
ramp, as well as the 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 DRV110 device has an internal Zener diode that
limits the supply at VIN to VZENER for applications that
require a higher supply voltage. Using the internal
Zener, the DRV110 can be powered from 120-V and
230-V AC supplies through a rectifier and currentlimiting
resistor. High DC voltages such as 48-V can
also be accommodated this way.