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LTC4270 Datasheet 12-port Poe/poe+/ltpoe++ Pse Controller

Manufacturer: Linear Technology (now Analog Devices)

General Description

The LTC®4270/LTC4271 chipset is a 12-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) pliant Power over Ethernet (PoE) systems.

Transformer-isolated munication protocol replaces expensive opto-couplers and plex isolated 3.3V supply resulting in significant BOM cost savings.

The LTC4270/LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25Ω sense resistors.

Key Features

  • nn 12 Independent PSE Channels nn Compliant with IEEE 802.3at Type 1 and 2 nn Chipset Provides Electrical Isolation nn Reduced BOM Cost nn Eliminates up to 6 High Speed Opto-Couplers nn Eliminates Isolated 3.3V Power Supply nn Low Power Dissipation nn 0.25Ω Sense Resistance Per Channel nn Very High Reliability 4-Point PD Detection nn 2-Point Forced Voltage nn 2-Point Forced Current nn VEE and VPORT Monitoring nn 1 Second Rolling IPORT Averaging nn Supports 2-Pair and 4-Pair Output Power nn 1MHz.

More Datasheets from Linear Technology (now Analog Devices)

Part Number Description
LTC4271 12-Port PoE/PoE+/LTPoE++ PSE Controller
LTC4274 Single PoE+PSE Controller
LTC4274A Single PoE/PoE+/LTPoE++ PSE Controller
LTC4274C Single PoE/PoE+/LTPoE++ PSE Controller
LTC4278 IEEE 802.3at PD
LTC4210-1 Hot Swap Controller
LTC4210-2 Hot Swap Controller
LTC4210-3 Hot Swap Controller
LTC4210-4 Hot Swap Controller
LTC4211 Hot Swap Controller

LTC4270 Distributor