LTC9101-2

RECOMMENDED FOR NEW DESIGNS

LTC9101-2

12/24-Port IEEE 802.3bt PoE PSE Controller

RECOMMENDED FOR NEW DESIGNS

LTC9101-2/LTC9102 Application Circuit slide

LTC9101-2/LTC9102 Pin Configuration slide

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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
Up to 24 PSE Ports with Two Power Channels per Port
+80V/–20V Tolerant Port-Facing Pins
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 Voltage and Current Monitoring
1MHz I²C Compatible Serial Control Interface
Pin or I²C Programmable PD Power
Available in a 24-Lead 4mm × 4mm (LTC9101‑2) and 64-Lead 7mm × 11mm (LTC9102) QFN Packages

Additional Details

The LTC^®9101-2/LTC9102 chipset is a 12/24-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. The LTC9101-2/LTC9102 is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. The LTC9101-2/LTC9102 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/voltage monitoring, programmable 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 LTC9101-2/LTC9102 includes an I²C serial interface operable up to 1MHz. The LTC9101-2/LTC9102 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:

Other places you can find help

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 2

LTC9101-2/LTC9102: 12/24-Port IEEE 802.3bt PoE PSE Controller Data Sheet (Rev.A) 03/24/2023

UG-2131: Evaluating the LTC9101-2A/LTC9101-2 and LTC9102 48-Channel IEEE 802.3at/bt PSE (Rev.0) 10/06/2023

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-2#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC9101AUF-2#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC9101AUF-2#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-2#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-2#PBF

PRODUCTION

LTC9101AUF-2#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-2#PBF

PRODUCTION

LTC9101AUF-2#TRPBF

PRODUCTION

pdf

PCN24_0142_Form

xls

Material_Report

pdf

Qualification Results Summary

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

EVAL-LTC9101-2

Evaluating the LTC9101-2A/LTC9101-2 and LTC9102 48-Channel IEEE 802.3at/bt PSE

EVAL-LTC9101-2 Evaluation Board - Angle View

EVAL-LTC9101-2 Evaluation Board - Top View

Evaluating the LTC9101-2A/LTC9101-2 and LTC9102 48-Channel IEEE 802.3at/bt PSE

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EVAL-LTC9101-2

Evaluating the LTC9101-2A/LTC9101-2 and LTC9102 48-Channel IEEE 802.3at/bt PSE

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Product Detail

The EVAL-LTC9101-2 is a 48-channel IEEE 802.3at/bt compliant power sourcing equipment (PSE). The EVAL-LTC9101-2 KIT includes the DC3159A-D or DC3159A-C daughter card, the DC3017A-B motherboard, and features the LTC9101-2A/LTC9101-2 and LTC9102 chipset.

In the EVAL-LTC9101-2 KIT, the daughter card has a single LTC9101-2A or LTC9101-2 digital controller. The DC3159A-D daughter card has the LTC9101-2A and the DC3159A-C has the LTC9101-2. The digital controller interfaces with four LTC9102 (12-channel) analog controllers for a total of 48 PSE channels.

The LTC9101-2A/LTC9101-2 use a proprietary isolated data interface allowing the LTC9101-2 to directly connect to the host controller I²C interface and eliminating the need for costly optocouplers and an additional 3.3 V supply.

The EVAL-LTC9101-2A Kit connects to up to forty-eight, 802.3af/at PDs with an Ethernet splitter for each two ports for 2-pair power evaluation. This kit version requires host control over I²C.

The EVAL-LTC9101-2 Kit connects to up to twenty-four, 802.3af/at/bt PDs directly at each port for 4-pair power evaluation. This kit version can operate autonomously or with host control over I²C.

Indicator LEDs quickly show channel status for the 48 power channels. An optional on-board buck regulator provides 3.3 V from the V_EE supply for the digital circuity. The demonstration manual provides an EVAL-LTC9101-2 KIT overview and quick start procedure.

Resources

ZIP

EVAL-LTC9101-2A - Design Files