FOD2741CT

Overview

The FOD2741CT is a single-channel optically isolated error amplifier manufactured by onsemi. It integrates an infrared LED with an NPN phototransistor output in an 8-MDIP package. Key electrical parameters include a 5000 Vrms isolation voltage, a forward voltage of 1.5 V, and a reference voltage of 2.495 V. The device supports a collector current of up to 50 mA with a maximum collector-emitter voltage of 30 V. Power dissipation is rated at 145 mW, and the current transfer ratio is 100%. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using optical coupling.
• Integrates a precision reference voltage for accurate error amplification applications.
• Features a robust NPN phototransistor output stage capable of handling significant collector currents.

Applications

• Switch-mode power supply feedback loops
• Industrial process control signal isolation
• Motor drive circuit protection

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status via official documentation before integration. Check end-of-life notifications as obsolescence may impact long-term supply chain stability. Ensure packaging specifications match assembly requirements. Validate datasheet revisions to confirm parameter consistency.

Selection Notes

Select this component when precise error amplification with galvanic isolation is required. Consider the 5000 Vrms isolation rating for safety-critical interfaces. Evaluate thermal management needs given the 145 mW power dissipation limit. Compare current transfer ratio requirements against load conditions. Assess package compatibility with existing PCB layouts for through-hole mounting.

Part Context

This part belongs to the FOD2741 series of optically isolated amplifiers. It shares functional similarities with variants like the FOD2741B and FOD2741ASDV but differs in packaging and surface-mount options. The CT suffix typically denotes a specific tape-and-reel or tube configuration within the product family, distinguishing it from other mechanical form factors offered by onsemi.

Replacement Considerations

Direct substitutes include FOD2741B and FOD2741ASDV. Verify pinout compatibility and package dimensions before substitution. Ensure replacement parts meet identical isolation voltage and current transfer ratio specifications. Confirm that alternative packages support the same operating temperature range and power dissipation limits.