LTC4278CDKD-1

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

SKU:703a9768c6c8 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：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：32-WFDFN Exposed Pad
Supplier Device Package：32-DFN (7x4)

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LTC4278CDKD-1

Overview

The LTC4278CDKD-1 is a Powered Device (PD) controller compliant with IEEE 802.3at standards, designed for PoE applications. It integrates a synchronous no-opto flyback controller and power switch within a DFN-32 package. The device supports classification detection and provides comprehensive protection features including overvoltage, overcurrent, and thermal shutdown. It enables efficient power conversion for LAN-powered equipment.

Feature Summary

Integrates synchronous no-opto flyback controller for isolated power supply generation
Supports IEEE 802.3at Powered Device classification and detection protocols
Includes integrated power switch with comprehensive fault protection mechanisms

Applications

IEEE 802.3at Powered Device implementations
LAN-powered network equipment
PoE endpoint power management systems

Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to confirm pinout and functional compatibility. The '-1' suffix indicates specific internal configuration or variant characteristics distinct from the base LTC4278 model. Ensure sourcing channels provide genuine components with valid traceability records to guarantee adherence to IEEE 802.3at specifications and operational reliability in deployed networks.

Selection Notes

Select this component when designing IEEE 802.3at compliant powered devices requiring an integrated solution for both classification logic and isolated power conversion. The DFN-32 package offers a compact footprint suitable for space-constrained LAN applications. Consider the integration of the flyback controller and power switch as a primary advantage for reducing external component count and simplifying board layout compared to discrete solutions.

Part Context

The LTC4278 series represents Analog Devices' approach to simplifying PoE Powered Device design by combining classification, control, and power switching functions. This specific variant targets high-power PD applications defined by the 802.3at standard. It belongs to the broader family of PoE/LAN interface ICs, focusing on robust power delivery and management for network infrastructure endpoints.