OPA548
OPA
548
OPA
548
O PA
548
SBOS070B – OCTOBER 1997 – OCTOBER 2003
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
FEATURES
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WIDE SUPPLY RANGE
Single Supply: +8V to +60V
Dual Supply:
±
4V to
±
30V
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HIGH OUTPUT CURRENT:
3A Continuous
5A Peak
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WIDE OUTPUT VOLTAGE SWING
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FULLY PROTECTED:
Thermal Shutdown
Adjustable Current Limit
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OUTPUT DISABLE CONTROL
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THERMAL SHUTDOWN INDICATOR
HIGH SLEW RATE: 10V/µs
LOW QUIESCENT CURRENT
PACKAGES:
7-Lead TO-220, Zip and Straight Leads
7-Lead DDPAK Surface-Mount
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.
APPLICATIONS
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VALVE, ACTUATOR DRIVERS
SYNCHRO, SERVO DRIVERS
POWER SUPPLIES
TEST EQUIPMENT
TRANSDUCER EXCITATION
AUDIO AMPLIFIERS
V+
–
V
IN
OPA548
+
V
IN
V
O
I
LIM
R
CL
(1/4W Resistor)
R
CL
sets the current limit
value from 0 to 5A.
E/S
V–
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.
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
www.ti.com
TI [ TEXAS INSTRUMENTS ]
