LTC4274

RECOMMENDED FOR NEW DESIGNS

Single PoE+ PSE Controller

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $5.37

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Part Details

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 (I_LIM)
- 7-Bit Programmable Overload Currents (I_CUT)
- 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

Part Models: 4
1ku List Price: Starting From $5.37

Documentation

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)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4274CUHF#TRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4274IUHF#PBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4274IUHF#TRPBF	38-Lead QFN (5mm x 7mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	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)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC4274CUHF#PBF	PRODUCTION
LTC4274CUHF#TRPBF	PRODUCTION
LTC4274IUHF#PBF	PRODUCTION
LTC4274IUHF#TRPBF	PRODUCTION

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

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 IEEE 802.3at Semi-auto mode operation is available for the LTC4266 (quad) PSE controller and may be applied to the LTC4274 (single); this software is requested from the Software Request Form.

Software Interface Datasheet and Software NEW

Hardware Ecosystem

Parts	Product Life Cycle	Description
PoE Power Sourcing Equipment (PSE) 1
LTC4274A LTC4274C		Single PoE/PoE+/LTPoE++ PSE Controller
Serial Bus Buffers, Extenders, and Accelerators 1
LTC4310	PRODUCTION	Hot-Swappable I²C Isolators

Parts	Product Life Cycle	Description
LTC4279	RECOMMENDED FOR NEW DESIGNS	Single Port PoE/PoE+/LTPoE++ PSE Controller

Tools & Simulations

LTspice 1

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

Models for the following parts are available in LTspice:

LTC4274

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

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

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Product Details

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.