PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

PWM LOW-SIDE DRIVER (1.5A and 3A)

for Solenoids, Coils, Valves, Heaters, and Lamps

FEATURES

q HIGH OUTPUT DRIVE: 1.5A and 3A Versions

q WIDE SUPPLY RANGE: +8V to +32V

q COMPLETE FUNCTION

Digitally Controlled Input

PWM Output

Adjustable Internal Oscillator: 500Hz to 100kHz

Adjustable Delay and Duty Cycle

q FULLY PROTECTED

Thermal and Current Limit Shutdown with

Status OK Indicator Flag

q PACKAGES: SO-8 and PowerPAD™ SO-8

APPLICATIONS

q ELECTROMECHANICAL DRIVER:

Solenoids, Valves, Positioners, Actuators,

Relays, Power Contactor Coils, Heaters, Lamps

q HYDRAULIC AND PNEUMATICS SYSTEMS

q PART HANDLERS AND SORTERS

q CHEMICAL PROCESSING

q ENVIRONMENTAL MONITORING AND HVAC

q THERMOELECTRIC COOLERS

q DC MOTOR SPEED CONTROLS

q MEDICAL AND SCIENTIFIC ANALYZERS

q FUEL INJECTOR DRIVERS

DESCRIPTION

The DRV103 is a low-side DMOS power switch employing

a pulse-width modulated (PWM) output. Its rugged design is

optimized for driving electromechanical devices such as

valves, solenoids, relays, actuators, motors, and positioners.

The DRV103 is also ideal for driving thermal devices such

as heaters, coolers, and lamps. PWM operation conserves

power and reduces heat rise, resulting in higher reliability. In

addition, adjustable PWM allows fine control of the power

delivered to the load. DC-to-PWM output delay time and

oscillator frequency are also externally adjustable.

The DRV103 can be set to provide a strong initial closure,

automatically switching to a “soft” hold mode for power

savings. A resistor, analog voltage, or Digital-to-Analog

(D/A) converter can control the duty cycle. An output OK flag

indicates when thermal shutdown or over current occurs.

Two packages provide a choice of output current:

1.5A (SO-8) or 3A (PowerPAD™ SO-8 with exposed metal

heat sink).

The DRV103 is specified for –40

°C to +85°C.

Delay

Adj

C

D

R

PWM

Input

On

Off

Thermal Shutdown

Over Current

Status OK

Flag

Load

+V

S

Oscillator

V

REF

PWM

GND

OUT

Flyback

Diode

DMOS

DMOS

ESD

Osc Freq

Adj

Duty Cycle

Adj

R

FREQ

Delay

DRV103

DRV103

SBVS029A – JUNE 2001

www.ti.com

Copyright © 2001, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

DRV1

03

DRV1

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