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TPS5904A Datasheet

  • TPS5904A

  • OPTOISOLATED FEEDBACK AMPLIFIERS

  • 10頁(yè)

  • TI

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t
TPS5904, TPS5904A
OPTOISOLATED FEEDBACK AMPLIFIERS
t
TAOS017 鈥?SEPTEMBER 1999
D
Precision Programmable Reference (2.5 V)
D
and an Optocoupler in a Single Package
Reference Voltage Tolerance
鈥?TPS5904
0.8%
鈥?TPS5904A 0.5%
鈥?TPS5904
100% to 400%
鈥?TPS5904A 150% to 300%
High Withstand Voltage (WTV), 7500 V Peak
for 1 Minute
Safety Regulatory Approvals Pending
鈥?UL
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)
D
Controlled Optocoupler CTRs:
D
D
LED
COMP
GND
FB
1
2
3
4
8
7
6
5
NC
C
E
NC
NC 鈥?No internal connection
Description
The TPS5904 and TPS5904A optoisolated feedback amplifiers consist of a precision programmable reference
and an optocoupler. Reference-voltage tolerance for the TPS5904 is 0.8%, and for the TPS5904A is 0.5%.
These 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 鈥?0擄C to 100擄C and 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
TPS5904: Reference-voltage tolerance, 0.8%
CTR Range, 100% to 400%
TPS5904A: Reference-voltage tolerance, 0.5%
CTR Range, 150% to 300%
4
3
R2
www.taosinc.com
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205
S
Plano, TX 75074
S
(972) 673-0759
t
t
Copyright
漏
2000, TAOS Inc.
1

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