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LTC4274
Single PoE+ PSE Controller
Features Description Compliant with IEEE 802.3at Type 1 and 2
nn 0.34О© Total Channel Resistance
nn 130mW/Port at 600mA
nn Advanced Power Management
nn 8-Bit Programmable Current Limit (I
LIM)
nn 7-Bit Programmable Overload Currents (I
CUT)
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 Compatible Serial Control Interface
nn Midspan Backoff Timer
nn Supports Proprietary Power Levels Above 25W
nn Available in 38-Pin 5mm Г— 7mm QFN Package The LTCВ®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. …