OPA549_12 Datasheet, PDF (1/18 Pages) Texas Instruments – High-Voltage, High-Current OPERATIONAL AMPLIFIER

OPA549
OPA549
OPA549
SBOS093E – MARCH 1999 – REVISED OCTOBER 2005
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
FEATURES
q HIGH OUTPUT CURRENT:
8A Continuous
10A Peak
q WIDE POWER-SUPPLY RANGE:
Single Supply: +8V to +60V
Dual Supply: ±4V to ±30V
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: 9V/µs
q CONTROL REFERENCE PIN
q 11-LEAD POWER PACKAGE
APPLICATIONS
q VALVE, ACTUATOR DRIVERS
q SYNCHRO, SERVO DRIVERS
q POWER SUPPLIES
q TEST EQUIPMENT
q TRANSDUCER EXCITATION
q AUDIO POWER AMPLIFIERS
DESCRIPTION
The OPA549 is a low-cost, high-voltage/high-current opera-
tional 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 ex-
tended industrial temperature range, –40°C to +85°C.
V+
OPA549
Ref
I_LIM
R_CL
V_O
R_CL sets the current limit
value from 0A to 10A.
(Very Low Power Dissipation)
ES Pin
E/S
Forced Low: Output disabled.
Indicates Low: Thermal shutdown.
V–
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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.
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