IC reference design search
IC manufacturers Analog Devices

IC manufacturers (104)

reference designLTC4279

Analog Devices LTC4279

Single Port PoE/PoE+/ LTPoE++ PSE Controller

Overview

TopologyOther Topology
Input voltage-51 - -57 V
Output 114 V

Description

The LTC®4279 is an autonomous single port power sourcingequipment (PSE) controller designed for use in IEEE802.3at Type 1, Type 2 and LTPoE++ compliant Powerover Ethernet (PoE) systems. The LTC4279 provides fullyautonomous IEEE 802.3 and LTPoE++ compliant operationwithout a microcontroller. The LTC4279 simplifies PSEimplementation, requiring only a single supply and a smallnumber of passive support components.

Features

Compliant with IEEE 802.3at Type 1 and 2nn Supports LTPoE++® Up to 90Wnn Supports Dual-Signature PDsnn Fully Autonomous Operation without Microcontrollernn Very Low Power Dissipation– 0.1Ω Sense Resistance– Low RDS(ON) External MOSFETnn Very High Reliability 4-Point PD Detection– 2-Point Forced Voltage and Forced Currentnn Robust Short-Circuit Protectionnn Cable Surge Protected ±80V OUT pinnn Classification Dependent ICUT and ILIM CurrentThresholdsnn Supports 2-Pair and 4-Pair Output Powernn UltraPWR Mode Supports Custom PDs up to 123Wnn Pin-Selectable Detection Backoff Timer for Midspansnn Pin Programmable Legacy PD Detectionnn Pin Programmable Maximum Power Modenn Status LED Pinnn Available in 20-Pin QFN and 16-Pin SO Packages

Typical applications

  • Security Systems
  • Femto Cells
  • Power Forwarders
  • PoE PSE Endpoints, PoE Midspan Power Injectors

More information

Products

Log in now to view availability and request availability forecasts. LOGIN
Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Data rate
Ports
PoE
Improved CMRR
Operating Temperature
VT(V (RMS))
Mount
L(µH)
SamplesAvailability & Sample
Log in now to view availability and request availability forecasts. LOGIN
749022016
SPECWE-LAN LAN Transformer, 1000BASE-T, 1
Simu­lation
Availability
–
Downloads4 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LAN LAN Transformer
Data rate1000BASE-T 
Ports1 
PoEPoE+ (up to 1150 mA) 
Improved Common Mode RejectionNo 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage1500 V (RMS)
MountSMT 
Inductance350 µH
–Check availability