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LTC4274 Datasheet Single PoE+PSE Controller

Manufacturer: Linear Technology (now Analog Devices)

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General Description

The LTC®4274 is a single power sourcing equipment controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet systems.

External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks even at Type 2 power levels.

External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard.

Overview

LTC4274 Single PoE+ PSE Controller.

Key Features

  • nn Compliant with IEEE 802.3at Type 1 and 2 nn 0.34Ω Total Channel Resistance nn 130mW/Port at 600mA nn Advanced Power Management nn 8-Bit Programmable Current Limit (ILIM) nn 7-Bit Programmable Overload Currents (ICUT) nn Fast Shutdown nn 14.5-Bit Port Current/Voltage Monitoring nn 2-Event Classification nn Very High Reliability 4-Point PD Detection nn 2-Point Forced Voltage nn 2-Point Forced Current nn High Capacitance Legacy Device Detection nn LTC4259A-1 and LTC4266 SW Compatible nn 1MHz I2C.

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