LTC4279
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LTC4279

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

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LTspice LT4275 - Power-over-Ethernet (PoE) Interface Controllers, LTC4279 - Power-over-Ethernet (PoE) Interface Controllers Download 5.95 KB
Part Models 4
1ku List Price Starting From $4.13
Features
  • 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
Additional Details
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The LTC4279 is an autonomous single port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1, Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems. The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++ compliant operation without a microcontroller. The LTC4279 simplifies PSE implementation, requiring only a single supply and a small number of passive support components.

The LTC4279 delivers lowest-in-industry heat dissipation by utilizing a low-RDS(ON) external MOSFET and a 0.1Ω sense resistor, eliminating the need for expensive heat sinks and increasing efficiency.

PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with physical layer classification and a 2.5 second backoff timer.

Legacy and custom PDs are supported with pin-selectable LEGACY and UltraPWR modes. LEGACY mode detects and powers pre-IEEE specification PDs. UltraPWR mode aggressively turns on and powers custom PDs requiring high inrush and/or operational currents.

Applications

  • PoE PSE Endpoints (Switch/Router)
  • PoE Midspan Power Injectors
  • Power Forwarders
  • Femto Cells
  • Security Systems
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file View Data Sheet
Documentation View All Documentation
LTspice LT4275 - Power-over-Ethernet (PoE) Interface Controllers, LTC4279 - Power-over-Ethernet (PoE) Interface Controllers Download 5.95 KB
Part Models 4
1ku List Price Starting From $4.13
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LTC4279

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Data Sheet

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UPDATED 08/03/2017
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LTC4279: Single Port PoE/PoE+/ LTPoE++ PSE Controller Data Sheet

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UPDATED 02/17/2017
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LTC4279: シングル・ポートPoE/PoE+/ LTPoE++ PSEコントローラ データシート

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User Guide

2

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UPDATED 12/19/2017
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DC2579A - Demo Board Manual redirect icon

424.00K

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UPDATED 01/17/2017
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DC2541A - Demo Manual (Rev.A) redirect icon

467.00K

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Reliability Data

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UPDATED 03/26/2018
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R547 Reliability Data redirect icon

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Documentation

Product Selector Card 1

Power over Ethernet Solutions

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Video

2018-08-20

02:51

Next Generation Power Over Ethernet

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4279IS#PBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC4279IS#TRPBF 16-Lead SOIC (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC4279IUFD#PBF 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC4279IUFD#TRPBF 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Product Lifecycle

PCN

Oct 12, 2022

- 22_0252

Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package

LTC4279IS#PBF

PRODUCTION

LTC4279IS#TRPBF

PRODUCTION

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PCN22_0252_Form

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Material_Report

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Qualification Results Summary

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Aug 6, 2022

- 22_0173

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC4279IS#PBF

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LTC4279IS#TRPBF

PRODUCTION

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Delta Qualification Matrix

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PCN

Oct 12, 2022

- 22_0252

arrow down

Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package

LTC4279IS#PBF

PRODUCTION

LTC4279IS#TRPBF

PRODUCTION

pdf

PCN22_0252_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon
Aug 6, 2022

- 22_0173

arrow down

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC4279IS#PBF

PRODUCTION

LTC4279IS#TRPBF

PRODUCTION

pdf

PCN22_0173_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

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Software & Part Ecosystem

Parts Product Life Cycle Description
LTC4274
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RECOMMENDED FOR NEW DESIGNS

Single PoE+ PSE Controller

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Single PoE/PoE+/LTPoE++ PSE Controller

Evaluation Kits 2

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DC2579A

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

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DC2579A

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

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DC2579A
LTC4279 Demo Board | Single Port UltraPWR PSE Controller (123W)
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Product Detail

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.

Resources

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ZIP

DC2579A - Design Files Download

1.00M

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PDF

DC2579A - Demo Board Manual Download

424.00K

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PDF

DC2579A - Schematics Download

39.00K

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DC2541A

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

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DC2541A

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

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DC2541A
LTC4279 Demo Board | Single Port PoE/PoE+/LTPoE++ PSE Controller (up to 123W)
Buy Now View Details

Product Detail

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.

Resources

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PDF

DC2541A - Schematic Download

41.00K

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PDF

DC2541A - Demo Manual (Rev.A) Download

467.00K

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ZIP

DC2541A - Design Files Download

1.00M

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Evaluation Kits2

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DC2579A

LTC4279 Demo Board | Single Port UltraPWR PSE Controller (123W)
evaluation kit item images

DC2541A

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

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LT4275 - Power-over-Ethernet (PoE) Interface Controllers, LTC4279 - Power-over-Ethernet (PoE) Interface Controllers Download

5.95 K

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