LTC4278IDKD#PBF

$6.04

Description：IC POE CNTRL 1 CHANNEL 32DFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:3967069d8c87 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 32DFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Type：Controller (PD), DC/DC
Number of Channels：1
Power - Max：25.5 W
Internal Switch(s)：Yes
Auxiliary Sense：Yes
Standards：802.3at (PoE+), 802.3af (PoE)
Voltage - Supply：37.2V ~ 60V
Current - Supply：1.35mA (Max)
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：32-WFDFN Exposed Pad
Supplier Device Package：32-DFN (7x4)

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LTC4278IDKD#PBF

Overview

The LTC4278IDKD#PBF is a Powered Device (PD) controller compliant with IEEE 802.3at and 802.3af standards, designed for Power over Ethernet applications. It operates within a source voltage range of 37.2V to 60V and supports a maximum power output of 25.5W. The device features an internal switch and auxiliary detection capabilities. It is housed in a 32-lead DFN package measuring 7x4mm, suitable for surface mount installation. The operational temperature range extends from 0°C to 70°C, with a maximum supply current of 1.35mA.

Feature Summary

Supports IEEE 802.3at (PoE+) and 802.3af (PoE) Powered Device protocols
Integrates a flyback controller with synchronization capability for non-isolated designs
Includes an internal high-voltage power switch for direct line connection
Provides auxiliary channel detection for enhanced port classification

Applications

IEEE 802.3at Powered Device implementations
Non-isolated PoE flyback power supply designs
Network endpoint power management systems

Procurement Notes

Verify the specific suffix 'IDKD' indicates the industrial temperature grade variant compared to the commercial 'CDKD' version. Confirm the '#PBF' designation ensures lead-free and RoHS compliance status. Cross-reference the exact package dimensions against the official datasheet mechanical drawing to ensure PCB footprint compatibility before finalizing procurement specifications.

Selection Notes

Select this component when designing a single-channel PoE+ powered device requiring integrated control and switching. It is appropriate for applications needing auxiliary detection and synchronous flyback conversion without external optocouplers. Ensure the design accommodates the 32-DFN thermal requirements and matches the 0°C to 70°C operating range constraints specified for the industrial grade part.

Part Context

This part belongs to the Analog Devices LTC4278 series of PoE controllers. It serves as a complete solution for Powered Devices, combining classification, protection, and power conversion control. The series differentiates between commercial and industrial temperature grades via the second character in the ordering code, providing options for varying environmental operating conditions.