LTC4268IDKD-1#PBF

Overview

The LTC4268IDKD-1#PBF is a high-power Powered Device (PD) controller designed for Power over Ethernet (PoE) applications. It integrates a synchronous rectifier and flyback converter controller to efficiently manage power delivery. The device supports IEEE 802.3at standards, enabling higher power consumption for connected equipment. It features an integrated optocoupler-free flyback controller for isolated secondary-side regulation. The component operates within a wide input voltage range and includes comprehensive protection mechanisms against faults such as overvoltage, overcurrent, and thermal events.

Feature Summary

• Integrates a synchronous rectifier with an optocoupler-less flyback controller for efficient isolated power conversion
• Supports IEEE 802.3at PoE standards for high-power powered device applications
• Provides comprehensive fault protection including overvoltage, overcurrent, and thermal shutdown

Applications

• High-power PoE endpoints requiring isolated DC-DC conversion
• Industrial networking equipment powered via Ethernet cables
• Wireless access points with enhanced power requirements

Procurement Notes

Verify the exact suffix and package type when ordering, as Analog Devices uses specific codes for temperature grades and reel quantities. Confirm RoHS compliance status through the official datasheet or manufacturer documentation prior to integration. Ensure the supply chain source provides valid traceability for this component.

Selection Notes

Select this part for designs requiring integrated PoE PD functionality with isolated output generation. It eliminates the need for external optocouplers in the flyback stage, reducing component count. Consider the DFN-32 package size for PCB layout constraints and ensure adequate thermal management for high-power operation scenarios.

Part Context

This component belongs to the LTC4268 series of PoE Powered Device controllers. It is distinct from non-isolated hot-swap controllers like the LTC4260. The series focuses on providing complete power management solutions for devices receiving power over Ethernet pairs while generating internal isolated rails.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.