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LTC4291-1

更新时间： 2024-09-25 02:52:07
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
40页 1613K
描述
4-Port IEEE 802.3bt PoE PSE Controller

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中文翻译

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LTC4291-1 数据手册

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LTC4291-1/LTC4292  
4-Port IEEE 802.3bt  
PoE PSE Controller  
FEATURES  
DESCRIPTION  
n
Four PSE Ports  
The LTC®4291-1/LTC4292 chipset is a 4-port power  
sourcing equipment (PSE) controller designed for use in  
IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet  
(PoE) systems. The LTC4291-1/LTC4292 is designed to  
power compliant 802.3af, 802.3at, and 802.3bt PDs. The  
LTC4291-1/LTC4292 chipset delivers lowest-in-indus-  
try heat dissipation by utilizing low RDS(ON) external  
MOSFETs and 0.15Ω sense resistance per power channel.  
A transformer-isolated communication protocol replaces  
expensive opto-couplers and complex isolated 3.3V sup-  
ply, resulting in significant BOM cost savings.  
n
Two Power Channels per Port  
n
n
Fully Compliant IEEE 802.3bt Type 3 and 4 PSE  
n
Compliant Support for Type 1, 2, 3, and 4 PDs  
Low Power Path Dissipation per Channel  
n
150mΩ Sense Resistance  
30mΩ or Lower MOSFET R  
n
DS(ON)  
n
n
Chipset Provides Electrical Isolation  
n
Eliminates Optos and Isolated 3.3V Supply  
Very High Reliability Multipoint PD Detection  
n
Connection Check Distinguishes Single-  
Signature and Dual-Signature PDs  
Continuous, Dedicated Per-Port Power and Current  
Monitoring  
Advanced power management features include per-port  
14-bit current monitoring, programmable current limit,  
and versatile fast shutdown of preselected ports. Advanced  
power management host software is available under a no-  
cost license. PD detection uses a proprietary multipoint  
detection mechanism ensuring excellent immunity from  
false PD identification. Autoclass and 5-event physical  
classification are supported. The LTC4291-1/LTC4292  
n
n
Per-Port Power Policing  
2
2
n
n
n
1MHz I C Compatible Serial Control Interface  
Pin or I C Programmable PD Power Up to 71.3W  
Available in a 40-Lead 6mm × 6mm (LTC4292) and  
24-Lead 4mm × 4mm (LTC4291-1) QFN Packages  
2
includes an I C serial interface operable up to 1MHz. The  
LTC4291-1/LTC4292 is pin or I2C programmable to nego-  
tiate PD delivered power up to 71.3W.  
APPLICATIONS  
n
PoE PSE Switches/Routers  
PoE PSE Midspans  
All registered trademarks and trademarks are the property of their respective owners.  
n
TYPICAL APPLICATION  
ꢀꢁꢂꢃꢄ  
10Ω  
0ꢀꢁꢂꢃ  
ꢀꢁꢀꢂ  
ꢀ
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄ  
ꢀ00ꢁ  
ꢀꢁꢂꢃꢄ  
ꢀꢁꢂ  
0ꢀꢁꢁꢂꢃ  
ꢀ00ꢁ  
ꢀ
ꢀꢀ  
ꢀꢁꢂ  
ꢀ
ꢀ
ꢀꢁꢂꢃꢄ  
ꢀꢁꢂꢃꢄ  
ꢀꢀ  
ꢀꢁ0  
ꢀꢁRꢂꢃ0  
ꢀꢁꢂꢃꢄꢅꢀꢂꢆ  
ꢀꢁꢂ  
ꢀꢁRꢂꢃꢄ  
ꢀ
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢁ  
4PVALID  
ꢀꢁꢂ  
0.15Ω  
100Ω  
100Ω  
ꢀꢁꢂꢃ  
ꢀ
ꢀꢀ  
ꢀ
ꢀ
ꢀꢁꢀꢂ  
ꢀ
ꢀꢁꢂꢀꢁꢃꢄ  
ꢀꢁꢁꢂꢃ  
ꢀꢀ  
ꢀꢁꢂ ꢃ ꢀ  
RESET  
ꢀꢁꢂꢃꢄꢅꢀꢂꢆ  
RꢀꢁꢂꢃRꢀꢄꢅ  
100Ω  
100Ω  
ꢀ
MSD  
ꢀꢁꢂꢃꢄ  
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀꢁꢂ  
0ꢀꢁꢁꢂꢃ  
ꢀ00ꢁ  
ꢀꢁꢀ  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢅꢆꢇꢆ  
ꢀꢁꢂꢃꢄꢅꢄ  
ꢀꢁꢂ  
INT  
ꢀ
100Ω  
100Ω  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄ  
ꢀꢁꢀꢂ  
ꢀ
ꢀꢀ  
ꢀꢁꢂꢃꢄ  
ꢀꢁꢂꢃꢄꢅ  
ꢀ
100Ω  
100Ω  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢅ  
ꢀꢁꢀ  
ꢀꢁꢂ  
ꢀꢁꢂ  
0.15Ω  
ꢀꢁ0  
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀ
ꢀꢀ  
ꢀꢁꢂ  
0ꢀꢁꢁꢂꢃ  
ꢀ
ꢀꢁꢂꢀꢁꢃꢄ  
ꢀꢁꢁꢂꢃ  
ꢀꢁꢂꢃ  
ꢀꢁꢂꢃ  
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢀ000ꢁꢂꢃꢄꢅꢆ  
Rꢀꢁꢂ  
ꢀꢁꢂꢀ  
ꢀ
ꢀꢁꢁꢂꢃ  
0
ꢀꢀ  
0.22μF, 100V  
0.15Ω  
ꢀꢁ ꢂꢃ ꢄ ꢅꢂRꢆꢇꢈ  
ꢀꢁꢂꢃꢄ  
ꢀ
ꢀꢀ  
ꢀꢁꢁꢂꢃ  
Rev 0  
1
Document Feedback  
For more information www.analog.com  
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