TPS5908, TPS5908A, TPS5910, TPS5910A

OPTOISOLATED FEEDBACK AMPLIFIERS

SOES030B – MAY 1997 – REVISED JANUARY 1998

1

POST OFFICE BOX 655303

(1.24 V) and an Optocoupler in a Single

Package

TPS5908, TPS5910

100% to 400%

TPS5908A, TPS5910A

150% to 300%

for 1 Minute

– UL... File Number E65085

– FIMKO, SEMKO, NEMKO, DEMKO

– EN60065/IEC 65

– EN60950/IEC 950

– VDE 0884, Level 4 (6000-V Insulation)

description

These optoisolated feedback amplifiers consist of the industry standard TLV431 precision programmable

reference with a 1% reference voltage tolerance, and an optocoupler. The devices are primarily intended for

use as the error-amplifier/reference/isolation-amplifier element in isolated ac-to-dc power supplies and dc-to-dc

converters. The optocoupler is a gallium-arsenide (GaAs) light-emitting diode that emits at a wavelength of

940 nm, combined with a silicon phototransistor. The current transfer ratio (CTR) ranges from 100% to 400%

in the standard version. The TPS5908A and TPS5910A versions with 150%-to-300% CTR are available for

higher-performance applications. All versions enable power-supply designers to reduce component count and

save space in tightly packaged designs. The tight-tolerance reference eliminates the need for adjustments in

many applications.

These devices are characterized for operation from – 40

°C to 100°C. Each amplifier is supplied in an 8-pin DIP

or in an 8-pin gull-wing surface-mount package (DCS).

typical application

1

2

4

3

7

6

TPS5908

PWM

Control

VI

R1

R2

TPS5908, TPS5910: CTR Range, 100% to 400%

TPS5908A, TPS5910A: CTR Range, 150% to 300%

VO

+

+

TPS5908A

TPS5910

TPS5910A

8

(TPS5910, TPS5910A Only)

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.

Copyright

© 1998, Texas Instruments Incorporated

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.

1

2

3

4

8

7

6

5

LED

COMP

GND

FB

C

E

NC

DCS OR P PACKAGE

(TOP VIEW)

NC – No internal connection

†BASE – TPS5910, TPS5910A only