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FEATURES

HIGH OUTPUT CURRENT: 2A

OUTPUT SWINGS TO: 150mV of Rails with IO = 2A

THERMAL PROTECTION

ADJUSTABLE CURRENT LIMIT

TWO FLAGS: Current Limit and Temperature

Warning

LOW SUPPLY VOLTAGE OPERATION: 2.7V to 5.5V

SHUTDOWN FUNCTION WITH OUTPUT DISABLE

SMALL POWER PACKAGE: SO-20 PowerPAD?

APPLICATIONS

THERMOELECTRIC COOLER DRIVER

LASER DIODE PUMP DRIVER

VALVE, ACTUATOR DRIVER

SYNCHRO, SERVO DRIVER

TRANSDUCER EXCITATION

GENERAL LINEAR POWER BOOSTER FOR

OP AMPS

PARALLELING OPTION FOR HIGHER

CURRENT APPLICATIONS

DESCRIPTION

The OPA569 is a low-cost, high-current, operational amplifier

designed for driving a wide variety of loads while operating on

low-voltage supplies. It operates from either single or dual

supplies for design flexibility and has rail-to-rail swing on the

input and output. Typical output swing is within 150mV of the

supply rails, with output current of 2A. Output swing closer to

the rails is achievable with lighter loads.

The OPA569 is unity-gain stable, has low dc errors, is easy

to use, and free from the phase inversion problems found in

some power amplifiers. High performance is maintained at

voltage swings near the output rails.

The OPA569 provides an accurate user-selected current

limit that is set with an external resistor, or digitally adjusted

via a Digital-to-Analog Converter.

The OPA569 output can be independently disabled using the

Enable pin, saving power and protecting the load.

The IMONITOR pin provides a 1:475 bidirectional copy of the

output current. This eliminates the need for a series current

shunt resistor, allowing more voltage to be applied to the

load. This pin can be used for simple monitoring, or feedback

control to establish constant output current.

Two flags are provided: one for warning of thermal overstress,

and one for current limit condition. The Thermal Flag

pin can be connected to the Enable pin to provide a thermal

shutdown solution.

Packaged in the Texas Instruments PowerPAD? package,

it is small and easy to heat-sink. The OPA569 is specified for

operation over the industrial temperature range, –40°C to

+85°C.