Texas Instruments Burr-Brown OPA569 Manual

FEATURES
HIGH OUTPUT CURRENT: 2A
OUTPUT SWINGS TO: 150mV of Rails with I
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
Current
Thermal Limit
V+ Flag Flag
12,13
(1)
7
5
–In
4
OPA569
19
6
3
+In
Current
Limit
Set
17, 18
R
SET
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.
PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
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.
Rail-to-Rail I/O, 2A
POWER AMPLIFIER
= 2A
O
Enable
8
Parallel Out 1
2
14, 15
V
O
9
Parallel Out 2
I = I /475
O
NOTE: (1) Connect
for thermal protection.
I
MONITOR
www.ti.com
SBOS264A – DECEMBER 2002 – REVISED DECEMBER 2003
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 I pin provides a 1:475 bidirectional copy of the
MONITOR
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 over-
stress, 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.
Copyright © 2002-2003, Texas Instruments Incorporated
OPA569