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U U
LTC4259A
Quad IEEE 802.3af Power over Ethernet Controller
with AC Disconnect
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 AC or DC Sensing – Power Good Indication
■ Operates Autonomously or Controlled by I2CTM Serial Interface
■ 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-UPin SSOP Package APPLICATIO S
■ IEEE 802.
LTC4259A Datasheet
