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FOD2741AT
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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)：100% @ 10mA
- Current Transfer Ratio (Max)：200% @ 10mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：-
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：30V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.5V (Max)
- Current - DC Forward (If) (Max)：-
- Vce Saturation (Max)：400mV
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Through Hole
- Package / Case：8-DIP (0.400", 10.16mm)
- Supplier Device Package：8-DIP
- Grade：-
- Qualification：-
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Overview
The FOD2741AT is a single-channel optically isolated error amplifier manufactured by Fairchild Semiconductor. It integrates a precision programmable shunt reference (KA431) with an NPN phototransistor output optocoupler in an 8-pin DIP package. The device provides high isolation voltage of 5000 Vrms and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a nominal current transfer ratio of 100%, a maximum collector-emitter breakdown voltage of 70 V, and a maximum forward current of 20 mA.
Feature Summary
- Integrates a precision programmable shunt reference with an optocoupler for closed-loop control applications
- Provides high-voltage electrical isolation between input and output circuits
- Features a standard 8-pin dual in-line package suitable for through-hole mounting
Applications
- Switching power supply feedback loops
- Isolated error amplification in offline converters
- Precision voltage regulation systems requiring galvanic isolation
Procurement Notes
Verify the specific suffix 'AT' against the manufacturer's official datasheet to confirm it denotes the tape-and-reel packaging variant rather than the standard bulk DIP version. Ensure compliance with RoHS directives and check for any end-of-life notices or obsolescence warnings from onsemi, the successor to Fairchild Semiconductor, before finalizing procurement plans.
Selection Notes
Select this component when a combined reference and isolation stage is required to minimize board space and component count. Compare the 5000 Vrms isolation rating against system safety requirements. Verify that the 100% CTR specification meets the loop gain requirements of the target application compared to lower CTR alternatives in the series.
Part Context
The FOD2741 series belongs to Fairchild's family of optically isolated error amplifiers. These devices are designed to replace traditional discrete error amplifier and optocoupler combinations. The series includes variants like FOD2741A and FOD2741B, which share similar integration concepts but may differ in tolerance or packaging options.
Replacement Considerations
Check for direct pin-compatible substitutes such as the FOD2741ASDV or FOD2741BSDV if surface-mount packaging is preferred. Verify functional equivalence with other opto-isolated error amplifiers from different manufacturers, ensuring isolation voltage and CTR specifications match.
