FOD2741AS Fairchild Semiconductor, FOD2741AS Datasheet

OPTOCOUPLER, TRANSISTOR, 5000VRMS

FOD2741AS

Manufacturer Part Number
FOD2741AS
Description
OPTOCOUPLER, TRANSISTOR, 5000VRMS
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FOD2741AS

No. Of Channels
1
Optocoupler Output Type
Phototransistor
Input Current
10mA
Output Voltage
70V
Opto Case Style
SMD
No. Of Pins
8
Mounting Type
Through Hole
Isolation Voltage
5kV
Input Current Max
10mA
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FOD2741ASD
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FOD2741ASDV
Manufacturer:
ADI
Quantity:
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Part Number:
FOD2741ASDV
Manufacturer:
FAIRCHILD/仙童
Quantity:
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©2004 Fairchild Semiconductor Corporation
FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1
FOD2741A, FOD2741B, FOD2741C
Optically Isolated Error Amplifier
Features
Applications
Functional Bock Diagram
Optocoupler, precision reference and error amplifier in
single package
2.5V reference
CTR 100% to 200%
5,000V RMS isolation
UL approved E90700, Volume 2
CSA approval 1296837
VDE approval 40002463
BSI approval 8702, 8703
Low temperature coefficient 50ppm/°C max.
FOD2741A: tolerance 0.5%
FOD2741B: tolerance 1%
FOD2741C: 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
Package Outlines
Description
The FOD2741 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 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 voltage/optocoupler function in iso-
lated AC to DC power supplies and DC/DC converters.
When using the FOD2741, 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 a 8-pin dip white package.
8
1
8
1
8
1
www.fairchildsemi.com
August 2008

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FOD2741AS Summary of contents

Page 1

... ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 Description The FOD2741 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 ...

Page 2

... LED *The compensation network must be attached between pins 6 and 7. Typical Application FAN4803 PWM V 1 Control ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 Pin Description Not connected Phototransistor Collector Phototransistor Emitter Not connected Ground Error Amplifier Compensation. This pin is the output of the error amplifier.* Voltage Feedback. This pin is the inverting input to the error amplifi ...

Page 3

... PD3 Total Power Dissipation Notes: 1. Derate linearly from 25° rate of 2.42mW/°C 2. Derate linearly from 25° rate of 1.42mW/°C. 3. Derate linearly from 25° rate of 2.42mW/°C. ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0 25°C unless otherwise specified) A Parameter ...

Page 4

... A 5. The dynamic impedance is defined as |Z resistors (see Figure 2), the total dynamic impedance of the circuit is given by ------- - Z 1 OUT, TOT OUT I ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0 25°C unless otherwise specified) A Test Conditions I = 10mA (Fig.1) LED COMP FB ...

Page 5

... Vcm, to assure that the output will remain high. Common mode transient immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse signal,Vcm, to assure that the output will remain low. ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 (Continued 25° ...

Page 6

... REF 5 Figure (min.) Test Circuit REF F, LED I (LED REF Figure 3. I Test Circuit REF Figure 5. I Test Circuit CEO ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0 Figure (LED) I CEO (LED COMP R2 V REF Test Circuit REF / COMP I (OFF) ...

Page 7

... Test Circuits (Continued + OUT 2.2k V OUT ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0 1mA 0 Figure 7. Frequency Response Test Circuit 0mA ( 1mA ( VCM _ + 10V P-P Figure 8. CMH and CML Test Circuit 0.47V A B www.fairchildsemi.com ...

Page 8

... T – AMBIENT TEMPERATURE ( C) A Fig. 12 – Off–State Current vs. Ambient Temperature 100 V = 37V -40 - – AMBIENT TEMPERATURE ( C) A ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 1.0 0.5 0.0 -0.5 -1.0 – 1.30 1.25 1.20 1.15 1.10 1. 100 ...

Page 9

... – FORWARD CURRENT (mA) LED Fig. 18 – Collector Current vs. Collector Voltage – COLLECTOR-EMITTER VOLTAGE (V) CE ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 (Continued 100 0 0.26 0.24 0.22 0. 0.18 0.16 0.14 0.12 0.10 - -0.32 -0. 20mA LED -0.36 -0.38 -0 ...

Page 10

... Typical Performance Curves ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 (Continued) Fig. 20 – Voltage Gain vs. Frequency VCC=10V IF=10mA 500 -10 -15 0 100 FREQUENCY (kHz 100 1000 www.fairchildsemi.com ...

Page 11

... OUT ---------------------------- - 1040 A R TOP ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 Compensation The compensation pin of the FOD2741 provides the opportunity for the designer to design the frequency response of the converter. A compensation network may be placed between the COMP pin and the FB pin. In typ- ical low-bandwidth systems, a 0.1µ ...

Page 12

... MIN 0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP Lead Coplanarity : 0.004 (0.10) MAX Note: All dimensions are in inches (millimeters) ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 0.4" Lead Spacing 0.200 (5.08) 0.140 (3.55) 15 MAX 0.300 (7.62) TYP 0.022 (0.56) 0.016 (0.41) 8-Pin DIP – ...

Page 13

... Surface Mount; Tape and Reel FOD2741AT 0.4" Lead Spacing FOD2741AV VDE0884 FOD2741ATV VDE0884; 0.4” Lead Spacing FOD2741ASV VDE0884; Surface Mount FOD2741ASDV VDE0884; Surface Mount; Tape and Reel 2741A Fairchild logo Device number VDE mark (Note: Only appears on parts ordered with VDE option – ...

Page 14

... Reflow Profile 300 250 200 150 100 50 0 ©2004 Fairchild Semiconductor Corporation FOD2741A, FOD2741B, FOD2741C Rev. 1.0 User Direction of Feed Description Tape Width Tape Thickness Sprocket Hole Pitch Sprocket Hole Diameter Sprocket Hole Location Pocket Location Pocket Pitch Pocket Dimensions Cover Tape Width Cover Tape Thickness Max ...

Page 15

... 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. Build it Now™ CorePLUS™ CorePOWER™ CROSSVOLT™ CTL™ Current Transfer Logic™ ...

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