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TPS5908A Datasheet

  • TPS5908A

  • TPS5908, TPS5908A, TPS5910, TPS5910A OPTOISOLATED FEEDBACK A...

  • 11頁

  • TI

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TPS5908, TPS5908A, TPS5910, TPS5910A
OPTOISOLATED FEEDBACK AMPLIFIERS
SOES030B 鈥?MAY 1997 鈥?REVISED JANUARY 1998
D
D
D
D
D
TLV431 Precision Programmable Reference
(1.24 V) and an Optocoupler in a Single
Package
1% Voltage-Reference Tolerance
Controlled Optocoupler CTRs:
TPS5908, TPS5910
100% to 400%
TPS5908A, TPS5910A 150% to 300%
High Withstand Voltage (WTV), 7500 V Peak
for 1 Minute
Safety Regulatory Approvals
鈥?UL . . . File Number E65085
鈥?FIMKO, SEMKO, NEMKO, DEMKO
鈥?EN60065/IEC 65
鈥?EN60950/IEC 950
鈥?VDE 0884, Level 4 (6000-V Insulation)
DCS OR P PACKAGE
(TOP VIEW)
LED
COMP
GND
FB
1
2
3
4
8
7
6
5
NC/BASE
鈥?/div>
C
E
NC
NC 鈥?No internal connection
鈥燘ASE 鈥?TPS5910, TPS5910A only
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 鈥?40擄C to 100擄C. Each amplifier is supplied in an 8-pin DIP
or in an 8-pin gull-wing surface-mount package (DCS).
typical application
+
+
VI
PWM
Control
VO
TPS5908
TPS5908A
TPS5910
TPS5910A
1
2
6
4
3
TPS5908, TPS5910: CTR Range, 100% to 400%
TPS5908A, TPS5910A: CTR Range, 150% to 300%
8
(TPS5910, TPS5910A Only)
R2
R1
7
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
漏
1998, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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