TPS5904 Datasheet, PDF (1/10 Pages) Texas Instruments – OPTOISOLATED FEEDBACK AMPLIFIERS

t
t
D Precision Programmable Reference (2.5 V)
and an Optocoupler in a Single Package
D Reference Voltage Tolerance
– TPS5904 0.8%
– TPS5904A 0.5%
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 Pending
– UL
– FIMKO, SEMKO, NEMKO, DEMKO
– EN60065/IEC 65
– EN60950/IEC 950
– VDE 0884, Level 4 (6000-V Insulation)
TPS5904, TPS5904A
OPTOISOLATED FEEDBACK AMPLIFIERS
TAOS017 – SEPTEMBER 1999
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 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 –40°C to 100°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
4
TPS5904: Reference-voltage tolerance, 0.8%
CTR Range, 100% to 400%
TPS5904A: Reference-voltage tolerance, 0.5%
CTR Range, 150% to 300%
3
R2
www.taosinc.com
Texas Advan^tced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 S Plano, TX 75074 S [phone]
t
Copyright © 2000, TAOS Inc.
1