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FOD2743CSV
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 8-SMD
- 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：Surface Mount
- Package / Case：8-SMD, Gull Wing
- Supplier Device Package：8-SMD
- Grade：-
- Qualification：-
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Overview
The FOD2743CSV is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor. It features an infrared emitting diode coupled to a phototransistor in a surface-mount SOIC-8 package. Key electrical parameters include a minimum current transfer ratio of 50% at 1mA input, a collector-emitter breakdown voltage of 70V, and a maximum forward voltage of 1.2V. The device supports a maximum forward current of 20mA and offers high isolation with a rated insulation voltage of 5000Vrms.
Feature Summary
- Provides galvanic isolation between input and output circuits using an infrared LED and phototransistor configuration.
- Designed for error amplifier coupling applications within power supply systems.
- Complies with international safety standards including UL recognition and VDE approval.
Applications
- Error amplifier coupling in switching power supplies
- Feedback loops in isolated DC-DC converters
- Signal transmission across isolation barriers in industrial control systems
Procurement Notes
Verify the specific suffix CSV confirms the surface-mount SOIC-8 packaging variant rather than through-hole DIP options. Confirm RoHS compliance status and lead-free designation as per the latest manufacturer documentation. Ensure the component meets required isolation voltage ratings for the target application environment. Check for obsolete status or lifecycle notices from the manufacturer before finalizing procurement plans.
Selection Notes
Select this component when a surface-mount solution is required for high-isolation voltage applications. Compare the 50% CTR minimum against system requirements for signal integrity. Consider the SOIC-8 footprint constraints versus thermal dissipation needs. Verify that the 70V collector-emitter voltage rating exceeds the maximum operating voltage of the driven circuit.
Part Context
This part belongs to the FOD274x series of transistor output optocouplers. It shares functional similarities with variants like FOD2741BTV and FOD2743BTV but differs in packaging and specific electrical tolerances. The series is designed for general-purpose isolation tasks requiring reliable signal transfer with high voltage blocking capabilities.
Replacement Considerations
Direct substitutes may include other single-channel transistor output optocouplers with similar CTR and isolation ratings. Verify pinout compatibility and package dimensions before substitution. Cross-reference with FOD2741BTV if higher CTR is acceptable, ensuring the package type matches the PCB layout requirements.
