LT LTC4271IUF#PBF

控制器（PSE）802.3at（PoE）

Overview

The LTC4270/LTC4271IUF chipset is a 12-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. The LTC4270/LTC4271IUF chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25Ω sense resistors.

The LTC4270/LTC4271IUF is available in multiple power grades allowing delivered PD power up to 90W.

Features

Tube Package
Tube package
24 pin count
3.354V power supplies

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LTC4271IUF#PBF Power Over Ethernet (PoE) Controllers applications.

• Security Cameras
• Internet Appliances
• POS Terminals
• IEEE 802.3af Compliant PoE Powered Devices
• Non-Compliant, Application Specific Devices
• Higher Power Ethernet Powered Devices
• IP Phone Power Management
• Wireless Access Points
• Security Cameras
• Power over Ethernet