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LTC4271 - 12-Port PoE/PoE+/LTPoE++ PSE Controller

Download the LTC4271 datasheet PDF. This datasheet also covers the LTC4270 variant, as both devices belong to the same 12-port poe/poe+/ltpoe++ pse controller family and are provided as variant models within a single manufacturer datasheet.

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) compliant Power over Ethernet (PoE) systems.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LTC4270-LinearTechnology.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Linear Technology (now Analog Devices)

Part Number Description
LTC4270 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

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 I2C Compatible Serial Control Interface nn Available In Three Power Grades nn A-Grade – LTPoE++™ 38.7W to 90W nn B-Grade – PoE+ 25.