LTC4274AIUHF-1#TRPBF

Overview

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

Feature Summary

• Supports multiple PoE standards including 802.3at, 802.3af, and LTPoE++
• Features programmable control via I2C interface
• Integrates protection mechanisms for safe power delivery

Applications

• Power over Ethernet switches
• Midspan injectors
• Access points

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the 'A' grade designation matches required performance specifications. Ensure compatibility with the intended PCB footprint for the 38-pin QFN EP package. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or recommended operating conditions prior to final procurement.

Selection Notes

Select this component for designs requiring compliance with IEEE 802.3at and LTPoE++ standards. Consider the 38.7W power capability and 45V-57V input range for appropriate power budgeting. Evaluate the I2C interface requirements for system integration. Assess the thermal management needs associated with the QFN EP package at the specified operating temperatures.

Part Context

This part belongs to the Analog Devices LTC4274 family of PSE controllers. It is functionally equivalent to the LTC4274AIUHF-1#PBF variant, differing primarily in packaging format. Both variants share identical electrical specifications and support the same PoE standards. The device serves as a core controller for implementing compliant PoE power sources in network infrastructure equipment.

Replacement Considerations

The LTC4274AIUHF-1#PBF is a confirmed substitute with identical electrical specifications, differing only in tube packaging instead of tape and reel.