LTC9101-1

RECOMMENDED FOR NEW DESIGNS

LTC9101-1

48-Port IEEE802.3bt (PoE 2) PSE Digital Controller

RECOMMENDED FOR NEW DESIGNS

LTC9101-1/LTC9102/LTC9103 Application Circuit slide

LTC9101-1/LTC9102/LTC9103 Application Circuit

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Part Models 2

1ku List Price Starting From $2.78

Features

Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
Fully Compliant IEEE 802.3at Type 2 PSE
Software-Compatible with LTC4291-1/LTC4292
Up to 48 PSE Ports with One Power Channel per Port
Up to 24 PSE Ports with Two Power Channels per Port
ECC-Protected eFlash and Data RAMs
Low Power Path Dissipation per Channel
- 100mΩ 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
Continuous Per-Port Power and Current Monitoring
1MHz I²C Compatible Serial Control Interface
Pin or I²C Programmable PD Power
Available in 24-Lead 4mm × 4mm (LTC9101‑1) and a 64-Lead 7mm × 11mm (LTC9102/LTC9103) QFN Packages

Additional Details

The LTC9101-1/LTC9102/LTC9103 chipset is a 48-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 2, 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. The LTC9101-1/LTC9102/LTC9103 is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. The LTC9101-1/LTC9102/LTC9103 chipset delivers lowest-in-industry heat dissipation by utilizing low-R_DS(ON) external MOSFETs and 0.1Ω sense resistance per power channel. A transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply, resulting in significant BOM cost savings.

Advanced power management features include per-port 14‑bit current/power monitoring, programmable current/power limits, and versatile fast shut-down of preselected ports. An advanced power management host software layer is available. PD detection uses a proprietary multipoint detection mechanism ensuring excellent immunity from false PD identification. Autoclass and 5-event physical classification are supported. The LTC9101-1/LTC9102/LTC9103 includes an I²C serial interface operable up to 1MHz. The LTC9101-1/LTC9102/LTC9103 is pin or I²C programmable to negotiate PD delivered power up to 71.3W.

APPLICATIONS

PoE PSE Switches/Routers and Midspans

To request software programming documentation, please complete the Software Request Form.

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $2.78

Technical Documents 3

LTC9101-1/LTC9102/LTC9103: 48-Port IEEE 802.3bt PoE PSE Controller Data Sheet (Rev.0) 11/11/2021

DC3160A - Demo Manual (Rev.0) 06/13/2022

Returning to the Office with Power Over Ethernet 2 01/28/2022

Design Resources 2

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-1#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC9101AUF-1#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC9101AUF-1#PBF
Pin/Package Drawing
24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC9101AUF-1#TRPBF
Pin/Package Drawing
24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Sep 19, 2024

- 24_0142

LTC9101- Wire Diameter and Bond Composition Change

LTC9101AUF-1#PBF

PRODUCTION

LTC9101AUF-1#TRPBF

PRODUCTION

pdf

PCN24_0142_Form

xls

Material_Report

pdf

Qualification Results Summary

Filter by Model

Part Models

Product Lifecycle

PCN

Sep 19, 2024

- 24_0142

LTC9101- Wire Diameter and Bond Composition Change

LTC9101AUF-1#PBF

PRODUCTION

LTC9101AUF-1#TRPBF

PRODUCTION

pdf

PCN24_0142_Form

xls

Material_Report

pdf

Qualification Results Summary

Alternative Parts 2

Parts	Product Life Cycle	Description
LTC9102	RECOMMENDED FOR NEW DESIGNS	12/24-Port IEEE 802.3bt PoE PSE Controller
LTC9103	RECOMMENDED FOR NEW DESIGNS	8-Channel IEEE802.3bt (PoE 2) PSE Analog Controller

Evaluation Software 1

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.

HTML Software Interface Datasheet

DC3160A

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

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DC3160A

DC3159A and DC3017A LTC9101-1/LTC9102/LTC9103 24-Port, 4-Pair IEEE 802.3bt PSE

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Product Detail

Demonstration kit 3160A-KIT is an Ethernet Alliance Gen 2 PoE certified, 24-port IEEE 802.3at/bt-compliant power sourcing equipment (PSE) composed of a DC3159A daughter card (48-channels) and DC3017A motherboard (24, 4-pair ports). The DC3160A-KIT features the LTC9101-1/LTC9102/LTC9103 PSE platform chipset.

In the DC3160A-KIT, a single LTC9101-1 digital controller interfaces with up to four analog controllers. The DC3159A-A daughter card has four LTC9102, 12-channel, analog controllers for 48 power channels total. The DC3159A-B daughter card has two LTC9102, 12-channel, analog controllers and two LTC9103, 8-channel, analog controllers for 40 power channels total. Up to twenty four IEEE 802.3af, IEEE 802.3at, or IEEE 802.3bt powered devices (PDs) can be connected to the DC3160A-KIT and powered from this system using a single power supply.

The LTC9101-1, LTC9102, and LTC9103 use a proprietary isolated data interface allowing the LTC9101-1 to directly connect to the host controller I2C interface and eliminates the need for costly opto-couplers and an additional 3.3V supply. The DC3160A-KIT can operate completely autonomously without a host controller or with a DC590 for I²C interfacing.

Robust surge protection is provided by design and onboard surge protection devices. Indicator LEDs show channel status for up to 48 power channels. An optional on-board buck regulator provides 3.3V from the VEE supply for the digital circuity. This demonstration manual provides an auto mode quick start procedure and DC3160A-KIT overview.

Design files for this circuit board are available.

Resources

PDF

DC3160A - Demo Manual (Rev.0)