LT LTC4290CIUJ#PBF

控制器（PSE）13 W802.3af（PoE）

Overview

The LTC4290/LTC4271 chipset is an 8-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 LTC4290/LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25Ω sense resistors.

The LTC4290/LTC4271 is available in multiple power grades allowing delivered PD power up to 90W.

Features

Bulk Package
Tube package
40 pin count
3.354V power supplies

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LTC4290CIUJ#PBF Power Over Ethernet (PoE) Controllers applications.

• Wireless Access Points
• Security Cameras
• Power over Ethernet
• PoE powered device appliances
• High power (>12.95 W) powered devices
• IEEE 802.3bt (Draft) Compliant Devices
• Lighting
• Power Modules
• Dual Signature PD/Forced UPOE
• 4PPOE