LTC4274A
LTC4274C

RECOMMENDED FOR NEW DESIGNS

Single PoE/PoE+/LTPoE++ PSE Controller

Data Sheet Product Selection Table
Part Models
10
1ku List Price
Starting From $5.37
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Part Details

  • 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
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Documentation

Data Sheet 1

User Guide 1

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
PoE Powered Device (PD) 1
LT4275
RECOMMENDED FOR NEW DESIGNS LTPoE++/PoE+/PoE PD Controller
Serial Bus Buffers, Extenders, and Accelerators 1
LTC4310
PRODUCTION Hot-Swappable I2C Isolators
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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
schematic 2
schematic 3
schematic 4
schematic 5
DC1814A-D

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

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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 6
DC1814A-A

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

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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 7
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 8
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.
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
DC1814A-A
LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE
DC1814A - Schematic
DC1814A-C
LTC4274A-3 Demo Board | LTPoE++ (70W) PSE
DC1814A - Schematic
DC1814A-B
LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE
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

50 Weeks Ago
Classification of LTPoE++90W in LTC4274A-4
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