FOD2743BSD

FOD2743BSD Datasheet


FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

Part Datasheet
FOD2743BSD FOD2743BSD FOD2743BSD (pdf)
Related Parts Information
FOD2743AS FOD2743AS FOD2743AS
FOD2743ASV FOD2743ASV FOD2743ASV
FOD2743AT FOD2743AT FOD2743AT
FOD2743ASD FOD2743ASD FOD2743ASD
FOD2743CSDV FOD2743CSDV FOD2743CSDV
FOD2743ATV FOD2743ATV FOD2743ATV
FOD2743AV FOD2743AV FOD2743AV
FOD2743A FOD2743A FOD2743A
FOD2743BT FOD2743BT FOD2743BT
FOD2743CSD FOD2743CSD FOD2743CSD
FOD2743CSV FOD2743CSV FOD2743CSV
FOD2743CS FOD2743CS FOD2743CS
FOD2743CTV FOD2743CTV FOD2743CTV
FOD2743CT FOD2743CT FOD2743CT
FOD2743CV FOD2743CV FOD2743CV
FOD2743C FOD2743C FOD2743C
FOD2743ASDV FOD2743ASDV FOD2743ASDV
FOD2743BSDV FOD2743BSDV FOD2743BSDV
FOD2743BS FOD2743BS FOD2743BS
FOD2743BV FOD2743BV FOD2743BV
FOD2743B FOD2743B FOD2743B
FOD2743BSV FOD2743BSV FOD2743BSV
PDF Datasheet Preview
FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

August 2008

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error Amplifier
• 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 FOD2743B tolerance 1% FOD2743C tolerance 2%
• Power supplies regulation
• DC to DC converters

The FOD2743 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

The Current Transfer Ratio CTR ranges from 50% to 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 isolated 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 eliminates the need for adjustments in many applications. The device comes in an 8-pin dip white package.

Functional Bock Diagram

LED 1 COMP 2

GND 3 FB 4
8 NC 7C 6E 5 NC

Package Outlines

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

Pin Definitions

Pin Number

Pin Name

Pin Description

Anode LED. This pin is the input to the light emitting diode.

COMP

Error Compensation. This pin is the output of the error *

Ground

Voltage Feedback. This pin is the inverting input to the error

Not connected

Phototransistor Emitter

Phototransistor Collector

Not connected
*The compensation network must be attached between pins 2 and

FAN4803

Control

FOD2743

R1 R2
2004 Fairchild Semiconductor Corporation

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

Absolute Maximum Ratings TA = 25°C unless otherwise

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 to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.

Parameter

TSTG TOPR TSOL VLED ILED VCEO VECO

IC PD1
Ordering Information

Option No Option

S SD T V TV SV SDV

Example Part Number FOD2743A FOD2743AS

FOD2743ASD FOD2743AT FOD2743AV FOD2743ATV FOD2743ASV FOD2743ASDV

Description Standard Through Hole Surface Mount Lead Bend Surface Mount Tape and Reel Lead Spacing VDE0884 Lead Spacing VDE0884 Surface Mount VDE0884 Surface Mount Tape and Reel

Marking Information
2743A 2 V XX YY B 6
1 Fairchild logo 2 Device number 3 VDE mark Note Only appears on parts ordered with VDE
option See order entry table 4 Two digit year code, e.g., ‘03’ 5 Two digit work week ranging from ‘01’ to ‘53’ 6 Assembly package code
2004 Fairchild Semiconductor Corporation

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

Carrier Tape Specifications

A0 B0

User Direction of Feed

Symbol W t P0 D0 E F P2 P A0 B0 K0 W1 d

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. Bending Radius

Dimension in mm ± ± ± ± ± ± ± ± ± max 10° 30
2004 Fairchild Semiconductor Corporation

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

Reflow Profile
• Peak reflow temperature
• Time of temperature higher than 245°C
• Number of reflows
260°C package surface temperature 40 seconds or less Three

Temperature °C
260°
245°
150 40 s

Time s

Figure Recommended IR Reflow Profile
2004 Fairchild Semiconductor Corporation

FOD2743A, FOD2743B, FOD2743C Optically Isolated Error

TRADEMARKS

The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks.

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The Power

TinyBoost TinyBuck TINYOPTO TinyPower TinyPWM TinyWire µSerDes
More datasheets: FOD2743CSV | FOD2743CS | FOD2743CTV | FOD2743CT | FOD2743CV | FOD2743C | FOD2743ASDV | FOD2743BSDV | FOD2743BS | FOD2743BV


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Datasheet ID: FOD2743BSD 514960