LT4276CHUFD#PBF

Overview

The LT4276CHUFD#PBF is a Powered Device (PD) controller supporting IEEE 802.3af/at and LTPoE++ standards, housed in a 28-lead QFN package. It operates with a supply voltage up to 60 V and draws a maximum supply current of 2 mA. The device supports an output power of 90 W and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated isolated switching regulator controller for forward and flyback topologies
• Supports auxiliary power input for enhanced operational flexibility
• Compatible with LTPoE++ and standard PoE/PoE+ protocols

Applications

• High-power PoE+ powered devices requiring 90W output
• LTPoE++ powered equipment designs
• Isolated DC/DC converter implementations using forward or flyback topologies

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited availability status. Confirm RoHS compliance details via official documentation before integration. Ensure the specific suffix matches design requirements as ordering variations may exist without functional changes.

Selection Notes

Select this part for applications demanding high-efficiency isolation in PoE systems. The wide operating temperature range suits industrial environments. Verify that the 90W power capability aligns with load requirements and that the QFN-28 package fits the PCB layout constraints.

Part Context

Part of the LT4276 family of pin-compatible PD controllers. Designed to simplify power management in Ethernet-powered devices by combining classification, power sourcing equipment interface, and isolated regulation control in a single IC.

Replacement Considerations

LT4276BIUFD#PBF

FAQ

What topologies does the LT4276CHUFD support?

It supports synchronous operation in both forward and flyback topologies.

Does this controller support auxiliary power?

Yes, it includes auxiliary power support capabilities.