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FOD2743A

Description
Transistor Output Optocouplers Error Amp Coupler Transistor Output
CategoryLED optoelectronic/LED    photoelectric   
File Size319KB,16 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Environmental Compliance
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FOD2743A Overview

Transistor Output Optocouplers Error Amp Coupler Transistor Output

FOD2743A Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerFairchild
package instructionDIP-8
Reach Compliance Codecompliant
Other featuresUL RECOGNIZED
Coll-Emtr Bkdn Voltage-Min70 V
ConfigurationSINGLE
Current transmission ratio - minimum value50%
Nominal current transfer ratio50%
Maximum dark power50 nA
Maximum forward current0.02 A
Maximum forward voltage1.2 V
Maximum insulation voltage5000 V
JESD-609 codee3
Installation featuresTHROUGH HOLE MOUNT
Number of components1
Maximum on-state current0.05 A
Maximum operating temperature85 °C
Minimum operating temperature-25 °C
Optoelectronic device typesTRANSISTOR OUTPUT OPTOCOUPLER
Maximum power dissipation0.085 W
surface mountNO
Terminal surfaceMatte Tin (Sn)
FOD2743A, FOD2743B, FOD2743C — Optically Isolated Error Amplifier
August 2008
FOD2743A, FOD2743B, FOD2743C
Optically Isolated Error Amplifier
Features
Optocoupler, precision reference and error amplifier in
Description
The FOD2743 Optically Isolated Amplifier consists of the
popular KA431 precision programmable shunt reference
and an optocoupler. The optocoupler is a gallium ars-
enide (GaAs) light emitting diode optically coupled to a
silicon phototransistor. It comes in 3 grades of reference
voltage tolerance = 2%, 1%, and 0.5%.
The Current Transfer Ratio (CTR) ranges from 50% to
100%. It also has an outstanding temperature coefficient
of 50 ppm/°C. It is primarily intended for use as the error
amplifier/reference voltage/optocoupler function in iso-
lated AC to DC power supplies and dc/dc converters.
When using the FOD2743, power supply designers can
reduce the component count and save space in tightly
packaged designs. The tight tolerance reference elimi-
nates the need for adjustments in many applications.
The device comes in an 8-pin dip white package.
a single package
2.5V reference
CTR 50% to 100% at 1mA
5,000V RMS isolation
UL approval E90700, Vol. 2
CSA approval 1296837
VDE approval pending
BSI approval pending
Low temperature coefficient 50ppm/°C max
FOD2743A: tolerance 0.5%
FOD2743B: tolerance 1%
FOD2743C: tolerance 2%
Applications
Power supplies regulation
DC to DC converters
Functional Bock Diagram
Package Outlines
LED
1
8 NC
8
1
COMP
2
7 C
GND
3
6 E
8
8
1
1
FB
4
5 NC
©2004 Fairchild Semiconductor Corporation
FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com
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