LTC4274A
LTC4274C
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LTC4274A
LTC4274C

Single PoE/PoE+/LTPoE++ PSE Controller

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Part Models 10
1ku List Price Starting From $5.37
Features
  • 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
Additional Details
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The LTC4274A is a single 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 a 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 feature 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.

The LTC4274C targets fully automatic PSE systems powering Type 1 (up to 13W) PDs.

Advanced power management features include: a 14-bit current monitoring ADC, DAC-programmable current limit, and versatile quick port shutdown. PD Discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. The LTC4274A/LTC4274C includes an I2C serial interface operable up to 1MHz.

The LTC4274A/LTC4274C is available in multiple power grades, allowing delivered PD power of 13W, 25.5W, 38.7W, 52.7W, 70W and 90W. These controllers are available in a 38-lead 5mm × 7mm QFN package.

Applications

  • LTPoE++ PSE Switches/Routers
  • LTPoE++ PSE Midspans
  • IEEE 802.3at Type 1 PSE Switches/Routers
  • IEEE 802.3at Type 1 PSE Midspans
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Documentation View All Documentation
Part Models 10
1ku List Price Starting From $5.37
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LTC4274A
LTC4274C

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UPDATED 07/17/2017
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LTC4274A/LTC4274C: Single PoE/PoE+/LTPoE++ PSE Controller Data Sheet

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UPDATED 09/11/2014
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LTC4274A_C: シングルPoE/PoE+/LTPoE++ PSEコントローラ データシート

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UPDATED 01/28/2016
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DC1814A - Demo Manual redirect icon

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Documentation

Product Selector Card 3

Power over Ethernet Solutions
PoE PD Controllers
LTPoE++ PSE Controllers

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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
LTC4274AIUHF-1#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274AIUHF-1#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274AIUHF-2#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Reliablity Data external-link
LTC4274AIUHF-2#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274AIUHF-3#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274AIUHF-3#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Material Declaration external-link
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LTC4274AIUHF-4#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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  • Material Declaration external-link
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LTC4274AIUHF-4#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274CIUHF#PBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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LTC4274CIUHF#TRPBF 38-Lead QFN (5mm x 7mm w/ EP) external-link
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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)

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

LTC4274AIUHF-1#PBF

PRODUCTION

LTC4274AIUHF-1#TRPBF

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LTC4274AIUHF-2#PBF

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LTC4274AIUHF-2#TRPBF

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Software & Part Ecosystem

Parts Product Life Cycle Description

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

Evaluation Kits 5

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DC1814A-D

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

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DC1814A-D

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

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Download

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DC1814A-D
LTC4274A-4 Demo Board | LTPoE++ (90W) PSE
Buy Now View Details

Product Detail

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.

Resources

pdf icon

PDF

DC1814A - Demo Manual Download

925.00K

pdf icon

ZIP

DC1814A - Design Files Download

730.00K

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PDF

DC1814A - Schematic Download

39.00K

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DC1814A-A

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

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DC1814A-A

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

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Download

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Print
DC1814A-A
LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE
Buy Now View Details

Product Detail

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.

Resources

pdf icon

PDF

DC1814A - Demo Manual Download

925.00K

pdf icon

ZIP

DC1814A - Design Files Download

730.00K

pdf icon

PDF

DC1814A - Schematic Download

39.00K

Show More Arrow image
reference details image

DC1814A-C

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

zoom

DC1814A-C

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

download icon

Download

 print icon

Print
DC1814A-C
LTC4274A-3 Demo Board | LTPoE++ (70W) PSE
Buy Now View Details

Product Detail

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.

Resources

pdf icon

PDF

DC1814A - Demo Manual Download

925.00K

pdf icon

ZIP

DC1814A - Design Files Download

730.00K

pdf icon

PDF

DC1814A - Schematic Download

39.00K

Show More Arrow image
reference details image

DC1814A-B

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

zoom

DC1814A-B

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

download icon

Download

 print icon

Print
DC1814A-B
LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE
Buy Now View Details

Product Detail

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.

Resources

pdf icon

PDF

DC1814A - Demo Manual Download

925.00K

pdf icon

ZIP

DC1814A - Design Files Download

730.00K

pdf icon

PDF

DC1814A - Schematic Download

39.00K

Show More Arrow image
reference details image

DC590B

Isolated USB Serial Controller for QuikEval-Compatible Demo Boards

Evaluation Kits5

evaluation kit item images

DC1814A-D

LTC4274A-4 Demo Board | LTPoE++ (90W) PSE
evaluation kit item images

DC1814A-A

LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE
evaluation kit item images

DC1814A-C

LTC4274A-3 Demo Board | LTPoE++ (70W) PSE
evaluation kit item images

DC1814A-B

LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE
evaluation kit item images

DC590B

Isolated USB Serial Controller for QuikEval-Compatible Demo Boards

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.

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