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.