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參數(shù)資料
| 型號： | LTC4274AIUHF-4#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC38 |
| 封裝： | 7 X 5 MM, LEAD FREE, PLASTIC, MO-220WHKD, QFN-38 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 313K |
| 代理商： | LTC4274AIUHF-4#PBF |
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LTC4274A/LTC4274C
1
4274acf
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LTPoE++ PSE Switches/Routers
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LTPoE++ PSE Midspans
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IEEE 802.3at Type 1 PSE Switches/Routers
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IEEE 802.3at Type 1 PSE Midspans
ApplicAtions
FeAtures
Description
Single PoE/PoE+/LTPoE++
PSE Controller
The LTC4274A is a single Power Sourcing Equipment
(PSE)controllercapableofdeliveringupto90WofLTPoE++
power to a compatible LTPoE++ Powered Device (PD). A
proprietarydetection/classificationschemeallowsmutual
identification between a LTPoE++ PSE and LTPoE++ PD
whileremainingcompatibleandinteroperablewithexisting
Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A
feature set is a superset of the popular LTC4274. These
PSE controllers feature low-RON external MOSFETs and
0.25Ω sense resistors which are especially important at
the LTPoE++ current levels to maintain the lowest possible
heat dissipation.
TheLTC4274CtargetsfullyautomaticPSEsystemspower-
ing Type 1 (up to 13W) PDs.
Advanced power management features include: a 14-bit
currentmonitoringADC,DAC-programmablecurrentlimit,
and versatile quick port shutdown. PD Discovery uses
a proprietary dual-mode 4-point detection mechanism
ensuring excellent immunity from false PD detection.
The LTC4274A/LTC4274C includes an I2C serial interface
operable up to 1MHz.
The LTC4274A/LTC4274C is available in multiple power
grades, allowing delivered PD power of 13W, 25.5W, 35W,
45W, 70W and 90W. These controllers are available in a
38-pin 5mm × 7mm QFN package.
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Compliant with IEEE 802.3at Type 1 and 2
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Low Power Dissipation
0.25Ω Sense Resistance Per Channel
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Very High Reliability 4-Point PD Detection
2-Point Forced Voltage
2-Point Forced Current
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High Capacitance Legacy Device Detection
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1MHz I2C Compatible Serial Control Interface
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Midspan Backoff Timer
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Supports 2-Pair and 4-Pair Output Power
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Available in Multiple Power Grades
LTC4274A-1: LTPoE++ 35W
LTC4274A-2: LTPoE++ 45W
LTC4274A-3: LTPoE++ 70W
LTC4274A-4: LTPoE++ 90W
LTC4274C: PoE 13W
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Available in 38-Pin 5mm × 7mm QFN Package
typicAl ApplicAtion
Complete Single-Port Ethernet High Power Source
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTPoE++ are trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
4274AC TA01
SCL
SDAIN
SDAOUT
AD0
AD1
AD2
AD3
AGND
VEE SENSE
–54V
1F
100V
SMAJ58A
GATE OUT
PORT
0.22F
100V
S1B
–54V
DGND
VDD
INT
SHDN
AUTO
MSD
RESET
MID
0.1F
3.3V
LTC4274A/LTC4274C
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4274C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Port PoE/PoE+/LTPoE++ PSE Controller |
| LTC4274CIUHF#PBF | 功能描述:IC CONTROLLER POE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4274CIUHF#TRPBF | 功能描述:IC CONTROLLER POE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4274CUHF#PBF | 功能描述:IC CONTROLLER POE 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4274CUHF#TRPBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP |
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