LTC4279

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $4.13
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Part Details

  • Compliant with IEEE 802.3at Type 1 and 2
  • Supports LTPoE++® Up to 90W
  • Supports Dual-Signature PDs
  • Fully Autonomous Operation without Microcontroller
  • Very Low Power Dissipation
    • 0.1Ω Sense Resistance
    • Low RDS(ON) External MOSFET
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage and Forced Current
  • Robust Short-Circuit Protection
  • Cable Surge Protected ±80V OUT pin
  • Classification Dependent ICUT and ILIM Current Thresholds
  • Supports 2-Pair and 4-Pair Output Power
  • UltraPWR Mode Supports Custom PDs up to 123W
  • Pin-Selectable Detection Backoff Timer for Midspans
  • Pin Programmable Legacy PD Detection
  • Pin Programmable Maximum Power Mode
  • Status LED Pin
  • Available in 20-Pin QFN and 16-Pin SO Packages
LTC4279
Single Port PoE/PoE+/LTPoE++ PSE Controller
Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC4274
RECOMMENDED FOR NEW DESIGNS Single PoE+ PSE Controller
LTC4274A
LTC4274C
Single PoE/PoE+/LTPoE++ PSE Controller
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC4279
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
DC2579A

LTC4279 Demo Board | Single Port UltraPWR PSE Controller (123W)

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Product Details

Demonstration Circuit 2579A features the LTC4279, an autonomous single port power sourcing equipment (PSE) controller, configured in its UltraPWR mode. UltraPWR mode aggressively turns on and powers custom high power PDs requiring high inrush and/or operational currents.

eval board
schematic 5
schematic 6
schematic 7
schematic 8
schematic 9
schematic 10
schematic 11
schematic 12
DC2541A

LTC4279 Demo Board | Single Port PoE/PoE+/LTPoE++ PSE Controller (up to 123W)

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Product Details

Demonstration circuit 2541A features the LTC4279, an autonomous single port Power Sourcing Equipment (PSE) controller for use in IEEE 802.3at Type 1, Type 2 and LTPoE++® compliant Power over Ethernet (PoE) systems. The LTC4279 simplifies IEEE and LTPoE++ PSE implementation, requiring only a 45-57V supply and a small number of passive support components.
DC2579A
LTC4279 Demo Board | Single Port UltraPWR PSE Controller (123W)
DC2579A Evaluation Board DC2579A Evaluation Board - Top View DC2579A Evaluation Board - Bottom View DC2579A
DC2541A
LTC4279 Demo Board | Single Port PoE/PoE+/LTPoE++ PSE Controller (up to 123W)
DC2541A Demo Board DC2541A Demo Board DC2541A Demo Board DC2541A Demo Board DC2541A Application Circuit DC2541A Application Circuit EA Certified 3 EA Certified 4

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