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LTC4258
Quad IEEE 802.3af Power over Ethernet Controller
with Integrated Detection
FEATURES
DESCRIPTIO
■ Controls Four Independent – 48V Powered Ethernet Ports
■ Each Port Includes: – IEEE 802®.3af Compliant PD Detection and Classification – Output Current Limit with Foldback – Short-Circuit Protection with Fast Gate Pull-Down – PD Disconnect Using DC Sensing – Power Good Indication
■ Operates Autonomously or by I2CTM Control ■ 4-Bit Programmable Digital Address Allows Control
of Up to 64 Ports ■ Programmable INT Pin Eliminates Software Polling ■ Current and Duty Cycle Limits Protect External FETs ■ Available in a 36-Pin SSOP Package
U APPLICATIO S
■ IEEE 802.
LTC4258 Datasheet
