FEATURES

HIGH OUTPUT CURRENT:

8A Continuous

10A Peak

WIDE POWER-SUPPLY RANGE:

Single Supply: +8V to +60V

Dual Supply: ±4V to ±30V

WIDE OUTPUT VOLTAGE SWING

FULLY PROTECTED:

Thermal Shutdown

Adjustable Current Limit

OUTPUT DISABLE CONTROL

THERMAL SHUTDOWN INDICATOR

HIGH SLEW RATE: 9V/μs

CONTROL REFERENCE PIN

11-LEAD POWER PACKAGE

APPLICATIONS

VALVE, ACTUATOR DRIVERS

SYNCHRO, SERVO DRIVERS

POWER SUPPLIES

TEST EQUIPMENT

TRANSDUCER EXCITATION

AUDIO POWER AMPLIFIERS

DESCRIPTION

The OPA549 is a low-cost, high-voltage/high-current operational

amplifier ideal for driving a wide variety of loads. This

laser-trimmed monolithic integrated circuit provides excellent

low-level signal accuracy and high output voltage and current.

The OPA549 operates from either single or dual supplies for

design flexibility. The input common-mode range extends

below the negative supply.

The OPA549 is internally protected against over-temperature

conditions and current overloads. In addition, the OPA549

provides an accurate, user-selected current limit. Unlike

other designs which use a “power” resistor in series with the

output current path, the OPA549 senses the load indirectly.

This allows the current limit to be adjusted from 0A to 10A

with a resistor/potentiometer, or controlled digitally with a

voltage-out or current-out Digital-to-Analog Converter (DAC).

The Enable/Status (E/S) pin provides two functions. It can be

monitored to determine if the device is in thermal shutdown,

and it can be forced low to disable the output stage and

effectively disconnect the load.

The OPA549 is available in an 11-lead power package. Its

copper tab allows easy mounting to a heat sink for excellent

thermal performance. Operation is specified over the extended

industrial temperature range, –40°C to +85°C.