Datasheet > LTC9102

LTC9102

更新时间： 2024-09-18 14:57:59

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
44页	2806K
描述
12/24端口IEEE 802.3bt PoE PSE控制器

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LTC9102 数据手册

Data Sheet

LTC9101-2/LTC9102

12/24-Port IEEE 802.3bt PoE PSE Controller

FEATURES

DESCRIPTION

► 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

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 de-

livers 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 a complex isolated 3.3V supply, resulting in

significant BOM cost savings.

► 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

Advanced power management features include per-port 14‑bit cur-

rent/voltage monitoring, programmable power limits, and versatile

fast shut down of preselected ports. An advanced power manage-

ment host software layer is available. PD detection uses a propri-

etary multipoint detection mechanism ensuring excellent immunity

from false PD identification. Autoclass and 5-event physical classi-

fication 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

TYPICAL APPLICATION

Figure 1. 802.3bt 4-Pair Application, 1 Port Shown

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to

change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

DOCUMENT FEEDBACK

TECHNICAL SUPPORT

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