FOD2743A

$0.43

Description：OPTOISOLATOR 5KV 1CH TRANS 8-DIP
Series：-
Mfr：Fairchild Semiconductor
Package：Tube

SKU:d526b9fb1c7d Category: Transistor, Photovoltaic Output Optoisolators Brand: Fairchild Semiconductor

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Product introduction

Product Detailed Parameters

Description：OPTOISOLATOR 5KV 1CH TRANS 8-DIP
Series：-
Mfr：Fairchild Semiconductor
Package：Tube
Number of Channels：1
Voltage - Isolation：5000Vrms
Current Transfer Ratio (Min)：50% @ 1mA
Current Transfer Ratio (Max)：100% @ 1mA
Turn On / Turn Off Time (Typ)：-
Rise / Fall Time (Typ)：-
Input Type：DC
Output Type：Transistor
Voltage - Output (Max)：70V
Current - Output / Channel：50mA
Voltage - Forward (Vf) (Typ)：1.07V
Current - DC Forward (If) (Max)：-
Vce Saturation (Max)：400mV
Operating Temperature：-40°C ~ 85°C
Mounting Type：Through Hole
Package / Case：8-DIP (0.300", 7.62mm)
Supplier Device Package：8-DIP
Grade：-
Qualification：-

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FOD2743A

Overview

The FOD2743A is an optically isolated amplifier comprising a precision programmable shunt reference and a phototransistor output optocoupler. It provides high-voltage isolation with a minimum collector-emitter breakdown voltage of 70 V and a maximum forward current of 20 mA. The device features a nominal current transfer ratio of 50% and supports a maximum insulation voltage of 5000 Vrms. Operating within a temperature range of -40°C to +85°C, it utilizes an 8-pin DIP or SMD-DIP package.

Feature Summary

Integrates a precision programmable shunt reference with an optocoupler for error amplification
Provides high-voltage electrical isolation between input and output circuits
Features a single-channel transistor output configuration

Applications

Switch-mode power supply feedback loops
Isolated error amplifier circuits
Voltage regulation systems requiring galvanic isolation

Procurement Notes

Verify the specific suffix (e.g., TV, BSDV) against the datasheet to confirm package type and lead spacing. Confirm RoHS compliance status as manufacturing sources vary. Check lifecycle status as some variants are marked end-of-life. Ensure the supplier documentation matches the exact part number to avoid pinout mismatches between DIP and surface-mount versions.

Selection Notes

Select this component when a combined reference and isolation stage is required in a compact form factor. Compare the 5000 Vrms isolation rating against system safety requirements. Evaluate the 50% typical CTR for loop stability. Consider thermal dissipation limits if operating near the upper temperature boundary. Verify that the 70 V collector-emitter voltage meets the circuit's peak voltage demands.

Part Context

This device belongs to the FOD2743 series of optically isolated amplifiers. It shares functional similarities with the FOD2742B but offers higher isolation voltage ratings. The series is designed for applications needing precise voltage referencing across isolation barriers. Variants include through-hole and surface-mount packages to accommodate different PCB layout constraints.