FOD2743B

Overview

The FOD2743B is a single-channel optically isolated amplifier manufactured by onsemi, housed in an 8-pin PDIP package. It features an NPN phototransistor output and provides 5000 Vrms insulation voltage. The device operates within a temperature range of -40°C to +85°C. Key electrical parameters include a forward voltage of 1.2 V, a current transfer ratio of 50%, a maximum collector current of 50 mA, and a maximum collector-emitter saturation voltage of 400 mV.

Feature Summary

• Integrates an error amplifier circuit for precise signal isolation
• Provides high-voltage galvanic isolation between input and output circuits
• Utilizes an NPN phototransistor output stage for linear amplification

Applications

• Industrial process control systems requiring isolated feedback loops
• Power supply regulation and monitoring circuits
• Medical equipment needing safe patient isolation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix and packaging type matches design requirements. Check for obsolescence notices as availability may be limited. Ensure compliance with relevant safety certifications such as UL, CSA, and VDE for the intended application environment.

Selection Notes

Select this component when high linearity and precision are required in isolated applications. Compare against standard digital optocouplers if analog performance is critical. Consider the PDIP package constraints for PCB layout and thermal management. Evaluate the 5000 Vrms isolation rating against system safety standards.

Part Context

This part belongs to the FOD2743 series of optically isolated amplifiers from onsemi. It is designed for applications demanding accurate transmission of analog signals across isolation barriers. The series typically includes variants with different packages and CTR specifications to suit diverse design needs.

Replacement Considerations

FOD2743CS is listed as a similar surface-mount alternative.