LTC4291-1

RECOMMENDED FOR NEW DESIGNS

4-Port IEEE 802.3bt PoE PSE Controller

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.43

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Part Details

Four PSE Ports
- Two Power Channels per Port
Low Power Path Dissipation per Channel
- 150mΩ Sense Resistance
- 30mΩ or Lower MOSFET R_DS(ON)
Chipset Provides Electrical Isolation
- Eliminates Optos and Isolated 3.3V Supply
Very High Reliability Multipoint PD Detection
- Connection Check Distinguishes Single-Signature and Dual-Signature PDs

Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
- Compliant Support for Type 1, 2, 3, and 4 PDs
Continuous, Dedicated Per-Port Power and Current Monitoring
- Per-Port Power Policing
1MHz I²C Compatible Serial Control Interface
Pin or I²C Programmable PD Power Up to 71.3W
Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291-1) QFN Packages

Part Models: 2
1ku List Price: Starting From $2.43

Documentation

Data Sheet 1

LTC4291-1/LTC4292: 4-Port IEEE 802.3bt PoE PSE Controller Data Sheet (Rev.0) 10/17/2018

Technical Articles 1

Jumpstarting IEEE 802.3bt’s PoE++ 09/01/2018

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
LTC4291IUF-1#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4291IUF-1#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC4291IUF-1#PBF	PRODUCTION
LTC4291IUF-1#TRPBF	PRODUCTION

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

Software Resources

Evaluation Software 1

Software Interface Datasheet

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.

Software Interface Datasheet

Evaluation Kits

DC2683A and DC2684A-B LTC4291-1/LTC4292 4-Port IEEE 802.3bt PSE

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Product Details

Demonstration circuit 2685B-KIT is an Ethernet Alliance Gen 2 PoE certified 4-port IEEE 802.3bt power sourcing equipment (PSE) composed of a DC2684A-B (daughter card) and DC2683A (motherboard). The DC2685BKIT is used for evaluation of the LTC4291-1/LTC4292 PSE chipset. Up to four IEEE 802.3af, IEEE 802.3at, or IEEE 802.3bt powered devices (PDs) can be connected and powered from this system using a single power supply. A DC590 is connected to the DC2685B-KITfor I²C interfacing with QuikEval™.

This demonstration manual provides a quick start procedure, a DC2684A-B daughter card overview, a DC2683A mother board overview, schematics, and layout printouts.