FOD2743B Fairchild Optoelectronics Group, FOD2743B Datasheet

OPTOISOLATOR ERROR AMP 8DIP

FOD2743B

Manufacturer Part Number
FOD2743B
Description
OPTOISOLATOR ERROR AMP 8DIP
Manufacturer
Fairchild Optoelectronics Group
Datasheet

Specifications of FOD2743B

Number Of Channels
1
Input Type
DC
Voltage - Isolation
5000Vrms
Current Transfer Ratio (min)
50% @ 1mA
Current Transfer Ratio (max)
100% @ 1mA
Voltage - Output
70V
Current - Output / Channel
50mA
Vce Saturation (max)
400mV
Output Type
Transistor
Mounting Type
Through Hole
Package / Case
8-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Dc Forward (if)
-
Other names
FOD2743BFS
FOD2743BFS
FOD2743B_NL
FOD2743B_NL

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FOD2743B
Manufacturer:
FAIRCHIL
Quantity:
21
Part Number:
FOD2743B
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FOD2743BV
Manufacturer:
Fairchild Semiconductor
Quantity:
1 971
©2004 Fairchild Semiconductor Corporation
FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
FOD2743A, FOD2743B, FOD2743C
Optically Isolated Error Amplifier
Features
Applications
Functional Bock Diagram
Optocoupler, precision reference and error amplifier in
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%
Power supplies regulation
DC to DC converters
COMP
GND
LED
FB
1
2
3
4
8 NC
7
6
5
C
E
NC
Package Outlines
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.
8
1
8
1
8
www.fairchildsemi.com
August 2008
1

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FOD2743B Summary of contents

Page 1

... GND 4 FB ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 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 ...

Page 2

... PWM V 1 Control ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 Pin Description Anode LED. This pin is the input to the light emitting diode. Error Amplifier Compensation. This pin is the output of the error amplifier. * Ground Voltage Feedback. This pin is the inverting input to the error amplifier ...

Page 3

... Collector Current C PD1 Input Power Dissipation PD2 Transistor Power Dissipation PD3 Total Power Dissipation Note: 1. See derating graph, Figure 21. ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0 25°C unless otherwise specified) A Parameter (1) 3 Value Units -40 to +125 °C -40 to +85 ° ...

Page 4

... A 3. 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 FOD2743A, FOD2743B, FOD2743C Rev. 1.0 25°C unless otherwise specified) A Test Conditions I = 1mA (Fig.1) LED COMP 1mA, V ...

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 FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 (Continued 25°C unless otherwise specified) A ...

Page 6

... REF 3 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 FOD2743A, FOD2743B, FOD2743C Rev. 1.0 Figure (LED) I CEO (LED COMP R2 V REF Test Circuit REF / COMP I (OFF) 1 ...

Page 7

... Test Circuits (Continued + OUT 2.2k V OUT ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C 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

... AMBIENT TEMPERATURE ( C) A Fig. 12 – Off–State Current vs. Ambient Temperature 100 V = 37V -40 - – AMBIENT TEMPERATURE ( C) A ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 1 COMP 0.5 0.0 -0.5 -1.0 – Fig. 11 – Reference Current vs Ambient Temperature 4.0 3.5 3.0 2 ...

Page 9

... FORWARD CURRENT (mA) LED Fig. 18 – Collector Current vs. Collector Voltage – COLLECTOR-EMITTER VOLTAGE (V) CE ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 (Continued) Fig. 15 – Collector Current vs. Ambient Temperature 100 -40 Fig. 17 – Saturation Voltage vs. Ambient Temperature 0.26 0.24 0.22 0.20 ...

Page 10

... Typical Performance Curves ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 (Continued) Fig. 20 – Voltage Gain vs. Frequency 10V 10mA 500 1mA 2. 10mA -10 - 100 FREQUENCY (kHz) Fig. 21 – Package Power Dissipation vs Ambient Temperature 200 150 100 50 0 -40 - – AMBIENT TEMPERATURE ( C) 10 ...

Page 11

... A R TOP ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 Compensation The compensation pin of the FOD2743 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. ...

Page 12

... TYP Lead Coplanarity : 0.004 (0.10) MAX Note: All dimensions are in inches (millimeters) ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C 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

... SDV Marking Information Definitions ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 Example Part Number FOD2743A Standard Through Hole FOD2743AS Surface Mount Lead Bend FOD2743ASD Surface Mount; Tape and Reel FOD2743AT 0.4" Lead Spacing FOD2743AV VDE0884 FOD2743ATV VDE0884; 0.4” Lead Spacing FOD2743ASV VDE0884 ...

Page 14

... ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C 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. Component Rotation or Tilt Min ...

Page 15

... Peak reflow temperature • Time of temperature higher than 245°C • Number of reflows 300 250 200 150 100 50 ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 260°C (package surface temperature) 40 seconds or less Three 100 150 Time (s) Figure 22. Recommended IR Reflow Profile 15 260° ...

Page 16

... Product Status Advance Information Formative / In Design Preliminary First Production No Identification Needed Full Production Obsolete Not In Production ©2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 PDP SPM™ FPS™ F-PFS™ Power-SPM™ ® FRFET PowerTrench SM Programmable Active Droop™ ...

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