TPS5904_12 Datasheet, PDF (1/12 Pages) Texas Instruments – OPTOISOLATED FEEDBACK AMPLIFIERS

TPS5904, TPS5904A
OPTOISOLATED FEEDBACK AMPLIFIERS
D TL1431 Precision Programmable Reference
(2.5 V) and an Optocoupler in a Single
Package
D Reference Voltage Tolerance
− TPS5904 0.8%
− TPS5904A 0.4%
D Controlled Optocoupler CTRs:
− TPS5904 100% to 400%
− TPS5904A 150% to 300%
D High Withstand Voltage (WTV), 7500 V Peak
for 1 Minute
D Safety Regulatory Approvals
− UL . . . File Number E65085
− FIMKO, SEMKO, NEMKO, DEMKO
− EN60065/IEC 65
− EN60950/IEC 950
− VDE 0884, Level 4 (6000-V Insulation)
SOES016D − MAY 1995 − REVISED JANUARY 1998
DCS OR P PACKAGE
(TOP VIEW)
LED 1
COMP 2
GND 3
FB 4
8 NC
7C
6E
5 NC
NC − No internal connection
description
The TPS5904 and TPS5904A optoisolated feedback amplifiers consist of the industry standard TL1431
precision programmable reference and an optocoupler. Reference-voltage tolerance for the TPS5904 is
0.8%, and for the TPS5904A, 0.4%. The devices are primarily intended for use as the error-amplifier/reference/
isolation-amplifier element in isolated ac-to-dc power supplies and dc/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
TPS5904A version with a 150%-to-300% CTR is available for higher-performance applications. When using
the TPS5904 or TPS5904A, power-supply designers can reduce component count and save space in tightly
packaged designs. The tight-tolerance reference eliminates the need for adjustments in many applications.
The TPS5904 and TPS5904A are characterized for operation from −40°C to 100°C. Each device is supplied
in an 8-pin DIP or in an 8-pin gull-wing surface-mount package (DCS).
typical application
+
+
V_I
PWM
Control
V_O
7 TPS5904/A ₁
2
R1
6
4
TPS5904: Reference-voltage tolerance, 0.8%
CTR Range, 100% to 400%
TPS5904A: Reference-voltage tolerance, 0.4%
CTR Range, 150% to 300%
3
R2
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  1998, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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