LTC4274
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LTC4274

Single PoE+ PSE Controller

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LTspice LTC4265 - Power-over-Ethernet (PoE) Interface Controllers, LTC4274 - Power-over-Ethernet (PoE) Interface Controllers Download 3.61 KB
Part Models 4
1ku List Price Starting From $5.37
Features
  • Compliant with IEEE 802.3at Type 1 and 2
  • 0.34Ω Total Channel Resistance
    • 130mW/Port at 600mA
  • Advanced Power Management
    • 8-Bit Programmable Current Limit (ILIM)
    • 7-Bit Programmable Overload Currents (ICUT)
    • Fast Shutdown
    • 14.5-Bit Port Current/Voltage Monitoring
    • 2-Event Classification
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage
    • 2-Point Forced Current
  • High Capacitance Legacy Device Detection
  • LTC4259A-1 and LTC4266 SW Compatible
  • 1MHz I2C Compatible Serial Control Interface
  • Midspan Backoff Timer
  • Supports Proprietary Power Levels Above 25W
  • Available in 38-Pin 5mm × 7mm QFN Package
Additional Details
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The LTC4274 is a single power sourcing equipment controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet systems. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks even at Type 2 power levels. External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard. 80V-rated port pins provide robust protection against external faults.

The LTC4274 includes advanced power management features, including current and voltage readback and programmable ICUT and ILIM thresholds. Available C libraries simplify software development; an optional AUTO pin mode provides fully IEEE-compliant standalone operation with no software required. Proprietary 4-point PD detection circuitry minimizes false PD detection while supporting legacy phone operation. Midspan operation is supported with built-in 2-event classification and backoff timing. Host communication is via a 1MHz I2C serial interface.

The LTC4274 is available in a 5mm × 7mm QFN package that significantly reduces board space compared with competing solutions.

Applications

  • PSE Switches/Routers
  • PSE Midspans
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file View Data Sheet
Documentation View All Documentation
LTspice LTC4265 - Power-over-Ethernet (PoE) Interface Controllers, LTC4274 - Power-over-Ethernet (PoE) Interface Controllers Download 3.61 KB
Part Models 4
1ku List Price Starting From $5.37
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LTC4274

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Data Sheet

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UPDATED 07/13/2017
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LTC4274: Single PoE+ PSE Controller Data Sheet

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UPDATED 04/18/2012
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LTC4274: シングルPoE+ PSE コントローラ データシート

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Reliability Data

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UPDATED 03/26/2018
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User Guide

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DC1567B - Demo Manual (Rev.B) redirect icon

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Documentation

Documentation

Product Selector Card 4

PoE PD Controllers
PoE+ for the Power Hungry
LTPoE++ PSE Controllers
Power over Ethernet Solutions

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2

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Video

2018-08-20

02:51

Next Generation Power Over Ethernet

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Video

2017-09-18

PoE++ Video Product Brief

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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
LTC4274CUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Material Declaration external-link
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LTC4274CUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Reliablity Data external-link
LTC4274IUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC4274IUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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Product Lifecycle

PCN

Dec 28, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4274CUHF#PBF

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LTC4274CUHF#TRPBF

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LTC4274IUHF#PBF

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LTC4274IUHF#TRPBF

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Dec 28, 2020

- 20_0245

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4274CUHF#PBF

PRODUCTION

LTC4274CUHF#TRPBF

PRODUCTION

LTC4274IUHF#PBF

PRODUCTION

LTC4274IUHF#TRPBF

PRODUCTION

pdf

PCN20_0245_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Other

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Qualification Results Summary

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Software & Part Ecosystem

Software & Part Ecosystem

Parts Product Life Cycle Description

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RECOMMENDED FOR NEW DESIGNS

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

Evaluation Kit

Evaluation Kits 2

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DC1567B

LTC4274 Demo Board | IEEE802.3at Power Over Ethernet PSE

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DC1567B

LTC4274 Demo Board | IEEE802.3at Power Over Ethernet PSE

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DC1567B
LTC4274 Demo Board | IEEE802.3at Power Over Ethernet PSE
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Product Detail

Demonstration circuit 1567B features the LTC4274, a single power sourcing equipment (PSE) controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. The LTC4274 is configured in the DC1567B as a midspan power injector where data comes in from an existing network system and out, along with power, to a powered device (PD). The LTC4274 autonomously detects and classifies a PD, turns power on to the port, and disconnects port power without the need for a microcontroller. A two second backoff timer supports the midspan configuration. A 55V nomical supply is recommended to power the demo board.

Resources

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DC1567B - Demo Manual (Rev.B) Download

436.00K

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DC1567B - Design Files Download

1.00M

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DC1567B - Schematic Download

38.00K

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DC590B

Isolated USB Serial Controller for QuikEval-Compatible Demo Boards

Evaluation Kits2

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DC1567B

LTC4274 Demo Board | IEEE802.3at Power Over Ethernet PSE
evaluation kit item images

DC590B

Isolated USB Serial Controller for QuikEval-Compatible Demo Boards
Tools & Simulations

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.

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LTC4265 - Power-over-Ethernet (PoE) Interface Controllers, LTC4274 - Power-over-Ethernet (PoE) Interface Controllers Download

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