FEATURES

− Single Supply: +7V to +15V

− Dual Supply:

±3.5V to ±7.5V

− Thermal Shutdown

− Adjustable Current Limit

PowerPAD

APPLICATIONS

NOTE: Pins 1, 10, and 11−20 are not connected.

Flag must be connected to V

−.

HTSSOP−20

+In

1

2

34

5

6

78

9

10

20

19

18

17

16

15

14

13

12

11

V+

OUT

E/S

CLS

I

LIM

−In

V

−

OPA561

DESCRIPTION

The OPA561 is a low-cost, high-current operational

amplifier capable of driving up to 1.2A pulses into reactive

loads. This monolithic integrated circuit provides high

reliability in demanding line-carrier communications, laser

diode drivers, and motor control applications. The high

slew rate provides 1MHz full-power bandwidth and

excellent linearity.

The OPA561 operates from either a single supply in the

range of 7V to 15V or dual power supplies of

±3.5V to

±7.5V for design flexibility. In single-supply operation, the

input common-mode range extends below ground. At

maximum output current, a wide output swing provides a

12Vp-p capability with a nominal 15V supply.

The OPA561 is internally protected against over-

temperature conditions and current overloads. In addition,

the OPA561 is designed to provide an accurate, user-

selected, current limit. The current limit can be adjusted

from 0.2A to 1.2A with a low-power resistor/potentiometer

or DAC (Digital-to-Analog Converter). The high-speed

characteristics of the current control loop provide accuracy

even under pulsed load conditions.

The Enable/Status (E/S) pin performs two functions: it can

be monitored to determine if the device is in thermal

shutdown (active LOW), and it can also be forced LOW to

disable the output, disconnecting the load.

The OPA561 is available in the miniature, HTSSOP-20

PowerPAD power package. This surface-mount package

is thermally enhanced and has a very low thermal

resistance. Operation is specified over the extended

industrial temperature range, −40

_C to +125_C.

OPA561

SBOS206E − DECEMBER 2001 − REVISED FEBRUARY 2007

High-Current, High-Speed

OPERATIONAL AMPLIFIER

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.

www.ti.com

Copyright

 2001-2007, Texas Instruments Incorporated

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 Incorporated. All other trademarks are the property of their respective owners.

Not Recommended for New Designs