LTC4269IDKD-1#PBF Power Switch ICs - POE / LAN IEEE 802.3at Hi Pwr PD & No-Opto Fly Cnt

LTC4269IDKD Datasheet

Product Details

DESCRIPTION

The LTC® 4266 is a quad PSE 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. 80V-rated port pins provide robust protection against external faults.

FEATURES

■ Four Independent PSE Channels
■ Compliant with IEEE 802.3at Type 1 and 2
■ 0.34Ω Total Channel Resistance
130mW/Port at 600mA
■ Advanced Power Management
8-Bit Programmable Current Limit (ILIM)
7-Bit Programmable Overload Currents (ICUT)
Fast Shutdown of Preselected Ports
14.5-Bit Port Current/Voltage Monitoring
2-Event Classification
■ Very High Reliability 4-Point PD Detection:
2-Point Forced Voltage
2-Point Forced Current
■ High Capacitance Legacy Device Detection
■ LTC4259A-1 and LTC4258 Pin and SW Compatible
■ 1MHz I2C Compatible Serial Control Interface
■ Midspan Backoff Timer
■ Supports Proprietary Power Levels Above 25W
■ Available in 38-Pin 5mm × 7mm QFN and 36-Pin
SSOP Packages

APPLICATIONS

■ High Power PSE Switches/Routers
■ High Power PSE Midspans

Specification

Form,Package,Functional compatible component
Descriptions

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