LTC9101-3

RECOMMENDED FOR NEW DESIGNS

8/16-Port IEEE 802.3at PoE PSE Digital Controller with Power Management and LED Control

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $3.20

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Overview

Fully Compliant IEEE 802.3at (Type 2) PSE
Up to 16 PSE Ports
Fully Autonomous System-Level Power Manager
- No Host Processor Required
System-Level PoE LED Controller
- Per-Port Status and Fault LEDs
- Supply Overload LED with Hysteresis
eFlash-Programmable System Settings
- Port- and System-Level Power Thresholds
- LED Mapping and Blink Rate
- Port Power Priority

ECC-Protected eFlash and Data RAMs
Very High Reliability Multipoint PD Detection
Lowest Per-Port Power Path Dissipation
- 100mΩ Sense Resistance
- 57mΩ or Lower MOSFET R_DS(ON)
Chipset Isolation Eliminates Isolated 3.3V Supply
Available in a 64-Lead 7mm × 11mm (LTC9103) and 24-Lead 4mm × 4mm (LTC9101-3) QFN Packages

The LTC9101-3/LTC9103 chipset is a 8/16-port power sourcing equipment (PSE) controller and power manager designed for use in IEEE 802.3at compliant Power over Ethernet (PoE) systems. The LTC9101-3 manages a user-defined system-level power budget across all ports. Port power is automatically assigned based on system power availability, initial physical classification and after power up, port dynamic power consumption.

The LTC9101-3 prioritizes port power by port number (port 1 is highest priority) and automatically removes power from lower priority ports to accommodate higher priority ports.

The LTC9101-3 features an interface to control an external serial LED driver. LED indications include Port On, Port Off, Port Power Denied, and Port Fault states. A Supply Overload LED indicates system power usage is near power limit or a port is being denied power.

The LTC9101-3 operates without a host present. Configuration is accomplished by pin settings and I²C-based flash programming.

The LTC9101-3 autonomously performs compliant 802.3at detection, classification power up, power on, and fault management.

APPLICATIONS

Small Business PoE PSE Switches/Routers

Part Models: 2
1ku List Price: Starting From $3.20

Documentation

Data Sheet 1

LTC9101-3/LTC9103: 8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control Data Sheet (Rev.0) 09/01/2022

User Guide 1

UG-2132: Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control (Rev.0) 10/05/2023

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
LTC9101AUF-3#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC9101AUF-3#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 19, 2024 - 24_0142 LTC9101- Wire Diameter and Bond Composition Change
		PCN24_0142_Form Material_Report Qualification Results Summary
LTC9101AUF-3#PBF	PRODUCTION
LTC9101AUF-3#TRPBF	PRODUCTION

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

Software Resources

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Evaluation Kits

Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control

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Product Details

The EVAL-LTC9101-3 is a 16-channel IEEE 802.3at compliant power sourcing equipment (PSE) with autonomous power management and serial LED driver for port LEDs. The EVAL-LTC9101-3 includes the EVAL-LTC9101-3-AZ daughter card, the EVAL-LTC9101-3-MBAZ motherboard, and features the LTC9101-3 and LTC9103 PSE platform chipset.

In the EVAL-LTC9101-3, a single LTC9101-3 digital controller interfaces with up to two LTC9103, 8-channel, analog controllers for 16 power channels total. Up to sixteen IEEE 802.3af/at/bt powered devices (PDs) can be connected to the EVAL-LTC9101-3 and powered from this system using a single power supply.

The LTC9101-3 and LTC9103 use a proprietary isolated data interface allowing the LTC9101-3 to share the same logic supply as the host controller and eliminate the need for an additional isolated 3.3 V supply. The EVAL-LTC9101-3 operates completely autonomously without a host controller, including flash configuration for power management and port LEDs. Port Status and Fault LEDs quickly show PoE status for up to sixteen ports, including fault codes, driven by the LTC9101-3 using a serial LED driver. A Supply Overload LED warns if system power usage is near the power budget and indicates if port power is denied or revoked.

Resources

EVAL-LTC9101-3 - Schematic
10/5/2023

EVAL-LTC9101-3 - Design Files
10/5/2023

UG-2132: Evaluating the LTC9101-3/LTC9103 16-Port, IEEE 802.3at PSE Controller with Power Management and LED Control (Rev.0)
10/5/2023

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