Datasheet > LTC9101-2A

LTC9101-2A

更新时间： 2024-11-08 17:01:31

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
34页	2451K
描述
12/24/48端口IEEE 802.3 PoE PSE控制器

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LTC9101-2A 数据手册

Data Sheet

LTC9101-2A/LTC9102

12-/24-/48-Port IEEE 802.3 at PoE PSE Controller

FEATURES

DESCRIPTION

► Fully Compliant IEEE 802.3at Type 1 and 2 PSE

► Up to 48 PSE Ports

► Industry-Standard Register Map

► +80V/–20V Tolerant Port-Facing Pins

► ECC-Protected eFlash and Data RAMs

► Low Power Path Dissipation per Channel

► 100mΩ Sense Resistance

The LTC^®9101-2A/LTC9102 chipset is a (up to) 48-port power

sourcing equipment (PSE) controller designed for use in IEEE

802.3at Type 1 and 2 compliant Power over Ethernet (PoE) sys-

tems. The LTC9101-2A/LTC9102 is designed to power compliant

802.3af and 802.3at PDs. The LTC9101-2A/LTC9102 chipset deliv-

ers lowest-in-industry heat dissipation using low R_DS(ON)external

MOSFETs and 0.1Ω sense resistance per power channel. A trans-

former-isolated communication protocol replaces expensive opto-

couplers and a complex isolated 3.3V supply, resulting in significant

bill of materials (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

► Continuous Per-Port Voltage and Current Monitoring

► 1MHz I²C Compatible Serial Control Interface

► Pin or I²C Programmable PD Power

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

rent/voltage monitoring, programmable current limits, and versatile

fast shutdown of preselected ports. PD detection uses a proprietary

multipoint detection mechanism, ensuring excellent immunity from

false PD identification. 1-event and 2-event physical classification

are supported. The LTC9101-2A/LTC9102 includes an I²C serial

► Available in 24-Lead 4mm × 4mm (LTC9101‑2A) and 64-Lead

7mm × 11mm (LTC9102) QFN Packages

interface operable up to 1MHz. The LTC9101-2A/LTC9102 is pin or

I²C programmable to negotiate PD-delivered power up to 25.5W.

APPLICATIONS

TYPICAL APPLICATION

► PoE PSE Switches/Routers and Midspans

Figure 1. 802.3at 2-Pair Application, 1 Port Shown

Rev. 0

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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