LTC4266A/LTC4266C

PRODUCTION

Quad PoE/PoE+/LTPoE++ PSE Controller

Data Sheet Product Selection Table
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Overview

  • Four Independent PSE Channels
  • 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
    • LTC4266A-1: LTPoE++™ 38.7W
    • LTC4266A-2: LTPoE++ 52.7W
    • LTC4266A-3: LTPoE++ 70W
    • LTC4266A-4: LTPoE++ 90W
    • LTC4266C: PoE 13W
  • Available in 38-Lead 5mm × 7mm QFN Package
LTC4266A/LTC4266C
Quad PoE/PoE+/LTPoE++ PSE Controller
Complete 4-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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Software Resources

Evaluation Software 1

Software Interface Datasheet and Software

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

Reference software for LTPoE++ Semi-auto mode operation is available for this PSE controller and may be requested from the Software Request Form.

Hardware Ecosystem

Parts Product Life Cycle Description
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Interface Transceivers 2
LTC4310
PRODUCTION Hot-Swappable I2C Isolators
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
Power-over-Ethernet (PoE) Controllers 1
LT4275
PRODUCTION LTPoE++/PoE+/PoE PD Controller
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Evaluation Kits

eval board
schematic 1
DC1815A-A

LTC4266A-1 Demo Board | 4-Port 38.7W LTPoE++ PSE (Requires DC590)

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Product Details

Demonstration circuit 1815A features the LTC4266A quad 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 LTC4266A feature set is a superset of the popular LTC4266. 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
DC1815A-B

LTC4266A-2 Demo Board | 4-Port 52.7W LTPoE++ PSE (Requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad 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 LTC4266A feature set is a superset of the popular LTC4266. 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
DC1815A-C

LTC4266A-3 Demo Board | 4-Port 70W LTPoE++ PSE (Requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad 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 LTC4266A feature set is a superset of the popular LTC4266. 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
DC1815A-D

LTC4266A-4 Demo Board | 4-Port 90W LTPoE++ PSE (requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad 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 LTC4266A feature set is a superset of the popular LTC4266. 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.


 
DC1815A-A
LTC4266A-1 Demo Board | 4-Port 38.7W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC1815A-B
LTC4266A-2 Demo Board | 4-Port 52.7W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC1815A-C
LTC4266A-3 Demo Board | 4-Port 70W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC1815A-D
LTC4266A-4 Demo Board | 4-Port 90W LTPoE++ PSE (requires DC590)
DC1815A-D Demo Board DC1815A-D Demo Board DC1815A-D Demo Board DC1815A-D Demo Board DC1815A - 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

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