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FOD2741AS
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 8-SMD
- Series：-
- Mfr：onsemi
- 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：Surface Mount
- Package / Case：8-SMD, Gull Wing
- Supplier Device Package：8-SMD
- Grade：-
- Qualification：-
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Overview
The FOD2741AS is an optically isolated error amplifier integrating a KA431 precision programmable shunt reference and an NPN phototransistor output. It provides high gain and stability for feedback loops in power supplies. Key electrical parameters include a 5000 Vrms isolation voltage, 100% to 200% current transfer ratio at 10 mA input, and a 2.495 V reference voltage. The device operates within a temperature range of -40°C to +85°C, supports a maximum collector current of 50 mA, and features a forward voltage of 1.5 V.
Feature Summary
- Integrates a precision programmable shunt reference with an optocoupler for compact error amplification
- Provides high-voltage galvanic isolation between input and output circuits
- Offers stable DC performance suitable for closed-loop control applications
Applications
- Switching power supply error amplification
- Flyback converter feedback loops
- Isolated voltage regulation circuits
Procurement Notes
Verify the specific suffix 'ASDV' or 'AS' against the required packaging format, as these denote different reel or tube configurations. Confirm RoHS compliance status through official manufacturer documentation, as environmental declarations may vary by production batch. Ensure the component designation matches the exact datasheet revision to avoid pinout or electrical specification mismatches during integration.
Selection Notes
Select this component when a combined reference and isolation stage is required to minimize board space. The integrated shunt reference eliminates the need for external biasing networks typically associated with discrete optocouplers. Consider the 5000 Vrms isolation rating for safety-critical designs requiring robust barrier protection between primary and secondary sides.
Part Context
This part belongs to the FOD2741 series of optically isolated amplifiers from onsemi. The series includes variants such as FOD2741B and FOD2741C, which share similar architectural principles but may differ in specific electrical tolerances or marking codes. The FOD2741AS specifically utilizes the SMD-DIP-8 package configuration for surface mount assembly.
Replacement Considerations
Direct substitutes include other parts within the FOD2741 family, such as FOD2741BSDV, provided the specific electrical characteristics align with the design requirements. Verify pin compatibility and isolation voltage ratings before substitution.
