FOD2742BV Fairchild Optoelectronics Group, FOD2742BV Datasheet

OPTOISOLATOR ERROR AMP 8SOIC

FOD2742BV

Manufacturer Part Number
FOD2742BV
Description
OPTOISOLATOR ERROR AMP 8SOIC
Manufacturer
Fairchild Optoelectronics Group
Datasheet

Specifications of FOD2742BV

Number Of Channels
1
Input Type
DC
Voltage - Isolation
2500Vrms
Current Transfer Ratio (min)
100% @ 10mA
Current Transfer Ratio (max)
200% @ 10mA
Voltage - Output
70V
Current - Output / Channel
50mA
Vce Saturation (max)
400mV
Output Type
Transistor
Mounting Type
Surface Mount
Package / Case
8-SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Dc Forward (if)
-
Other names
FOD2742BVFS
FOD2742BVFS
FOD2742BV_NL
FOD2742BV_NL
©2003 Fairchild Semiconductor Corporation
FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1
FOD2742A, FOD2742B, FOD2742C
Optically Isolated Error Amplifier
Features
Applications
Schematic
Optocoupler, precision reference and error amplifier in
single package
2.5V reference
CTR 100% to 200%
2,500V RMS isolation
UL approval E90700, Volume 2
BSI approval 8661, 8662
VDE approval 136616
CSA approval 1113643
Low temperature coefficient 50 ppm/°C max.
FOD2742A: tolerance 0.5%
FOD2742B: tolerance 1%
FOD2742C: tolerance 2%
Power supplies regulation
DC to DC converters
NC
NC
C
E
4
1
2
3
8 LED
7
6
5
FB
COMP
GND
Description
The FOD2742 Optically Isolated Amplifier consists of the
popular KA431 precision programmable shunt reference
and an optocoupler. The optocoupler is a gallium
arsenide (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 100% to
200%. It also has an outstanding temperature coefficient
of 50 ppm/°C. It is primarily intended for use as the error
amplifier/reference
isolated ac to dc power supplies and dc/dc converters.
When using the FOD2742, power supply designers can
reduce the component count and save space in tightly
packaged designs. The tight tolerance reference
eliminates
applications. The device comes in a 8-pin small outline
package.
Package Outline
the
need
voltage/optocoupler
for
adjustments
www.fairchildsemi.com
function
April 2009
in
many
in

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FOD2742BV Summary of contents

Page 1

FOD2742A, FOD2742B, FOD2742C Optically Isolated Error Amplifier Features Optocoupler, precision reference and error amplifier in single package 2.5V reference CTR 100% to 200% 2,500V RMS isolation UL approval E90700, Volume 2 BSI approval 8661, 8662 VDE approval 136616 CSA approval ...

Page 2

Pin Definitions Pin Number Pin Name GND 6 COMP LED *The compensation network must be attached between pins 6 and 7. Typical Application FAN4803 PWM V 1 Control ...

Page 3

Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure ...

Page 4

Electrical Characteristics Input Characteristics Symbol Parameter V LED Forward Voltage F V Reference Voltage REF V Deviation of V Over REF (DEV) REF Temperature V Ratio of V Variation to RE REF the Output of the Error V COMP Amplifier ...

Page 5

Electrical Characteristics Output Characteristics Symbol Parameter I Collector Dark Current CEO BV Emitter-Collector Voltage ECO Breakdown BV Collector-Emitter Voltage CEO Breakdown Transfer Characteristics Symbol Parameter CTR Current Transfer Ratio V Collector-Emitter CE (SAT) Saturation Voltage Isolation Characteristics Symbol Parameter I ...

Page 6

Test Circuits I (LED REF 5 Figure (min) Test Circuit REF F, LED I (LED REF Figure 3. I Test Circuit ...

Page 7

Test Circuits (Continued + OUT 2.2k V OUT ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0 0.1 ...

Page 8

Typical Performance Curves Fig. 9a LED Current vs. Cathode Voltage COMP -10 - – CATHODE VOLTAGE (V) COMP Fig. 10 Reference Voltage ...

Page 9

Typical Performance Curves Fig. 14 Dark Current vs. Ambient Temperature V = 10V CE 1000 100 10 1 0.1 -40 - – AMBIENT TEMPERATURE ( C) A Fig. 16 Current Transfer Ratio vs. LED Current 160 V ...

Page 10

Typical Performance Curves ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 (Continued) Fig. 20 Voltage Gain vs. Frequency 10V 10mA 100 - 500 -10 ...

Page 11

The FOD2742 The FOD2742 is an optically isolated error amplifier. It incorporates three of the most common elements neces- sary to make an isolated power supply, a reference volt- age, an error amplifier, and an optocoupler functionally equivalent ...

Page 12

Package Dimensions 8-pin SOIC Surface Mount 0.143 (3.63) 0.123 (3.13) 0.021 (0.53) 0.011 (0.28) Lead Coplanarity: 0.004 (0.10) MAX Recommended Pad Layout 0.275 (6.99) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in ...

Page 13

Ordering Information Option Order Entry Identifi R2V Marking Information Definitions ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 V VDE 0884 R2 Tape and reel (2500 units per reel) R2V VDE ...

Page 14

Carrier Tape Specifications 3.50 0.20 0.30 MAX 8.3 0.10 0.1 MAX User Direction of Feed Dimensions in mm ©2003 Fairchild Semiconductor Corporation FOD2742A, FOD2742B, FOD2742C Rev. 1.0.1 8.0 0.10 2.0 0.05 4.0 0.10 6.40 0.20 14 Ø1.5 MIN 1.75 0.10 ...

Page 15

Reflow Profi 260 240 T L 220 200 180 160 140 120 100 Profile Freature Temperature Min. (Tsmin) Temperature Max. (Tsmax) Time (t ) from (Tsmin to Tsmax) S Ramp-up Rate (t Liquidous ...

Page 16

TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended exhaustive list of all such trademarks. Auto-SPM™ F-PFS™ Build it Now™ FRFET CorePLUS™ Global ...

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