Description

8-Port PoE/PoE+/LTPoE++ PSE Analog Controller Features: Eight Independent PSE Channels Compliant with IEEE 802.3at Type 1 and 2 Chipset Provides Electrical Isolation Reduced BOM Cost Eliminates up to 6 High Speed Opto-Couplers Eliminates Isolated 3.3V Power Supply Low Power Dissipation 0.25Ω Sense Resistance Per Channel Very High Reliability 4-Point PD Detection 2-Point Forced Voltage 2-Point Forced Current VEE and VPORT Monitoring 1 Second Rolling IPORT Averaging Supports 2-Pair and 4-Pair Output Power 1MHz I2C Compatible Serial Control Interface Available In Three Power Grades A-Grade – LTPoE++™ 38.7W to 90W B-Grade – PoE+ 25.5W C-Grade – PoE 13W Available In a 40-Lead 6mm × 6mm (LTC4290) and 24-Lead 4mm × 4mm (LTC4271) QFN Package