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FOD2743C
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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)：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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Overview
The FOD2743C is an optically isolated error amplifier manufactured by Fairchild Semiconductor. It integrates a GaAsP infrared LED with a phototransistor output in an 8-pin DIP package. The device provides high isolation voltage of 5000 Vrms and supports a maximum forward current of 20 mA with a typical forward voltage of 1.2 V. It features a collector-emitter breakdown voltage of 70 V, a maximum collector current of 50 mA, and a saturation voltage of 400 mV. The current transfer ratio ranges from 50% to 100%, and it operates within a temperature range of -40°C to +85°C.
Feature Summary
- Integrates an infrared LED with a phototransistor for optical signal transmission
- Provides high electrical isolation between input and output circuits
- Designed specifically for error amplifier coupling applications
Applications
- Error amplifier coupling in power supply feedback loops
- Isolation of control signals in switching mode power supplies
- Feedback path isolation in industrial control systems
Procurement Notes
Verify the specific suffix (e.g., C, BTV) against the required datasheet revision and pinout configuration. Confirm RoHS compliance status and lead-free certification if required by assembly standards. Check manufacturer documentation for end-of-life notices or obsolescence warnings before finalizing procurement plans.
Selection Notes
Select this component when high isolation voltage and precise error amplification are required. Ensure the operating temperature range meets system requirements. Verify that the current transfer ratio specifications align with the drive circuit capabilities. Compare pin compatibility with existing designs if substituting similar models.
Part Context
This part belongs to the FOD2743 series of optically isolated error amplifiers. It is commonly used in applications requiring galvanic isolation for feedback control. The series includes variants with different packaging options such as DIP and surface-mount packages. These devices are widely utilized in power electronics for safe signal transmission across isolation barriers.
Replacement Considerations
Check for direct pin-compatible substitutes from onsemi or other manufacturers. Verify that replacement parts meet the same isolation voltage and current transfer ratio specifications. Ensure thermal and mechanical characteristics match the original design constraints.
