LTC4274A/LTC4274C

PRODUCTION

Single PoE/PoE+/LTPoE++ PSE Controller

Data Sheet Product Selection Table
Viewing:

Overview

  • Compliant with IEEE 802.3at Type 1 and 2
  • Low Power Dissipation
    • 0.25Ω Sense Resistance Per Channel
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage
    • 2-Point Forced Current
  • High Capacitance Legacy Device Detection
  • 1MHz I2C Compatible Serial Control Interface
  • Midspan Backoff Timer
  • Supports 2-Pair and 4-Pair Output Power
  • Available in Multiple Power Grades
  • Available in 38-Lead 5mm × 7mm QFN Package
LTC4274A/LTC4274C
Single PoE/PoE+/LTPoE++ PSE Controller
Complete Single-Port Ethernet High Power Source Product Package 1
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 1

Data Sheet

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

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Evaluation Software 1

Software Interface Data Sheet and Software

The software interface data sheet for this PSE may be requested from the Software Request Form (SRF). This data sheet describes the I2C interface and programming details for the respective PSE controller.

Reference software for LTPoE++ Semi-auto mode operation is available for the LTC4266A and may be applied to the LTC4274A; this software may be requested from the Software Request Form.

Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers 1
LTC4310
PRODUCTION Hot-Swappable I2C Isolators
Power-over-Ethernet (PoE) Controllers 1
LT4275
PRODUCTION LTPoE++/PoE+/PoE PD Controller
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC4274
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
DC1814A-A

LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE

Buy Now View Details

Product Details

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 2
DC1814A-B

LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE

Buy Now View Details

Product Details

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 3
DC1814A-C

LTC4274A-3 Demo Board | LTPoE++ (70W) PSE

Buy Now View Details

Product Details

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 4
schematic 5
schematic 6
schematic 7
schematic 8
DC1814A-D

LTC4274A-4 Demo Board | LTPoE++ (90W) PSE

Buy Now View Details

Product Details

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.
DC1814A-A
LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE
DC1814A - Schematic
DC1814A-B
LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE
DC1814A - Schematic
DC1814A-C
LTC4274A-3 Demo Board | LTPoE++ (70W) PSE
DC1814A - Schematic
DC1814A-D
LTC4274A-4 Demo Board | LTPoE++ (90W) PSE
DC1814A-D Demo Board DC1814A-D Demo Board DC1814A-D Demo Board DC1814A-D Demo Board DC1814A - Schematic
DC590B
Isolated USB Serial Controller for QuikEval-Compatible Demo Boards
DC590B Demo Board DC590B Demo Board DC590B Demo Board DC590B Demo Board DC590B - Schematic

Latest Discussions

2 Years Ago
Classification of LTPoE++90W in LTC4274A-4
View related discussion on EngineerZone®

Recently Viewed