LTC4274AIUHF-1#PBF

Overview

The LTC4274AIUHF-1#PBF is a single-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at (PoE+) and 802.3af (PoE) standards, with support for LTPoE++. It operates within a power supply voltage range of 45V to 57V and delivers a maximum output power of 38.7W. The device features an I2C interface for programmability and monitoring. It is housed in a 38-pin QFN EP package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports multiple PoE standards including 802.3at, 802.3af, and LTPoE++
• Provides I2C interface for system control and status monitoring
• Integrates single-channel PSE controller functionality

Applications

• Power Over Ethernet (PoE) infrastructure equipment
• PoE+ midspan power injectors
• LTPoE++ powered devices requiring high power delivery

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel or tube packaging as per manufacturer documentation. Confirm the 'A' grade designation matches required temperature and performance specifications. Ensure the 38-pin QFN EP footprint aligns with PCB layout requirements. Cross-reference the active part status with current distributor availability lists.

Selection Notes

Select this component when designing systems requiring compliance with IEEE 802.3at and 802.3af standards alongside LTPoE++ capabilities. The I2C interface allows for flexible configuration and diagnostic reporting. Consider the 38.7W power limit and 45V-57V input range when sizing external components. The wide operating temperature range suits industrial or outdoor deployment scenarios.

Part Context

This part belongs to the Analog Devices LTC4274 family of PoE controllers. It serves as a specialized solution for powering remote network devices over Ethernet cabling. The device integrates necessary control logic for standard-compliant power sourcing, distinguishing it from general-purpose hot-swap controllers found in other LTC series products.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.