LT4276BHUFD#TRPBF

$2.99

Description：IC POE CNTRL 1 CHANNEL 28QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)

SKU:8f76196cf315 Category: Power Over Ethernet (PoE) Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC POE CNTRL 1 CHANNEL 28QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)
Type：Controller (PD), DC/DC
Number of Channels：1
Power - Max：25.5 W
Internal Switch(s)：No
Auxiliary Sense：Yes
Standards：802.3at (PoE+), 802.3af (PoE)
Voltage - Supply：60V (Max)
Current - Supply：2mA (Max)
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：28-WFQFN Exposed Pad
Supplier Device Package：28-QFN (4x5)

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LT4276BHUFD#TRPBF

Overview

The LT4276BHUFD#TRPBF is a Powered Device (PD) controller supporting IEEE 802.3af, 802.3at, and LTPoE++ standards. It integrates an isolated switching regulator controller for forward and flyback topologies with auxiliary power support. Input voltage ranges from 37V to 57V. Output capabilities include 5V at 13A (70W), 5V at 7A (38.7W), 5V at 4.7A (25.5W), 12V at 1.9A (25.5W), and 24V at 1A (25.5W). Efficiency reaches 94%. The device operates within a temperature range of -40°C to +125°C in a 28-QFN package.

Feature Summary

Supports IEEE 802.3af, 802.3at, and LTPoE++ Powered Device protocols
Integrates isolated switching regulator controller for synchronous forward and flyback topologies
Includes auxiliary power support functionality

Applications

LTPoE++ Powered Device power supplies
PoE+ Powered Device power supplies
Isolated DC-DC conversion in PoE systems

Procurement Notes

Verify the specific suffix HUFD#TRPBF against the manufacturer datasheet to confirm tape and reel packaging and RoHS compliance status. Ensure the ordering part number matches the exact electrical specifications required for the target application design.

Selection Notes

Select this component for designs requiring integrated PD classification and isolated regulation. It supports high-power LTPoE++ applications up to 70W. Consider thermal management requirements for the QFN package when designing for maximum output power scenarios.

Part Context

This part belongs to the LT4276 family of pin-for-pin compatible controllers. It serves as a solution for powering Ethernet devices via data lines, combining classification logic with power conversion control in a single IC.