OPA548

V

IN

–

V

IN

+

V+

E/S

R

CL

R

value from 0 to 5A.

(1/4W Resistor)

I

LIM

V

O

V–

High-Voltage, High-Current

OPERATIONAL AMPLIFIER

DESCRIPTION

The OPA548 is a low-cost, high-voltage/high-current opera-

tional amplifier ideal for driving a wide variety of loads. A

laser-trimmed monolithic integrated circuit provides excellent

low-level signal accuracy and high output voltage and cur-

rent.

The OPA548 operates from either single or dual supplies for

design flexibility. In single-supply operation, the input com-

mon-mode range extends below ground.

The OPA548 is internally protected against over-temperature

conditions and current overloads. In addition, the OPA548

was designed to provide an accurate, user-selected current

limit. Unlike other designs which use a “power” resistor in

series with the output current path, the OPA548 senses the

load indirectly. This allows the current limit to be adjusted

from 0A to 5A with a resistor/potentiometer or controlled

digitally with a voltage-out or current-out DAC.

The Enable/Status (E/S) pin provides two functions. An input

on the pin not only disables the output stage to effectively

disconnect the load, but also reduces the quiescent current

to conserve power. The E/S pin output can be monitored to

determine if the OPA548 is in thermal shutdown.

The OPA548 is available in an industry-standard

7-lead staggered and straight lead TO-220 package, and a

7-lead DDPAK surface-mount plastic power package. The

copper tab allows easy mounting to a heat sink or circuit

board for excellent thermal performance. It is specified for

operation over the extended industrial temperature range,

–40

°C to +85°C. A SPICE macromodel is available for

design analysis.

FEATURES

q WIDE SUPPLY RANGE

Single Supply: +8V to +60V

Dual Supply:

q HIGH OUTPUT CURRENT:

3A Continuous

5A Peak

q WIDE OUTPUT VOLTAGE SWING

q FULLY PROTECTED:

Thermal Shutdown

Adjustable Current Limit

q OUTPUT DISABLE CONTROL

q THERMAL SHUTDOWN INDICATOR

q HIGH SLEW RATE: 10V/

µs

q LOW QUIESCENT CURRENT

q PACKAGES:

7-Lead TO-220, Zip and Straight Leads

7-Lead DDPAK Surface-Mount

APPLICATIONS

q VALVE, ACTUATOR DRIVERS

q SYNCHRO, SERVO DRIVERS

q POWER SUPPLIES

q TEST EQUIPMENT

q TRANSDUCER EXCITATION

q AUDIO AMPLIFIERS

OPA548

SBOS070B – OCTOBER 1997 – OCTOBER 2003

www.ti.com

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.

Copyright © 1997-2003, 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.

OPA5

48

OPA

548

OPA5

48