LTC4271IUF#PBF

更新时间： 2024-11-09 13:09:51

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
32页	336K
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LTC4271IUF#PBF 数据手册

LTC4290/LTC4271

8-Port PoE/PoE

PSE Controller

FEATURES

DESCRIPTION

Eight Independent PSE Channels

The LTC^®4290/LTC4271 chipset is an 8-port power sourc-

ing equipment (PSE) controller designed for use in IEEE

802.3at Type 1 and Type 2 (high power) compliant Power

over Ethernet (PoE) systems. Transformer-isolated com-

munication protocol replaces expensive opto-couplers

and complex isolated 3.3V supply resulting in significant

BOMcostsavings.TheLTC4290/LTC4271chipsetdelivers

Compliant with IEEE 802.3at Type 1 and 2

Chipset Provides Electrical Isolation

Reduced BOM Cost

Eliminates up to 6 High Speed Opto-Couplers

Eliminates Isolated 3.3V Power Supply

Low Power Dissipation

0.25Ω Sense Resistance Per Channel

lowest-in-industryheatdissipationbyutilizinglow-R

external MOSFETs and 0.25Ω sense resistors.

DS(ON)

Very High Reliability 4-Point PD Detection

2-Point Forced Voltage

Advancedpowermanagementfeaturesincludeper-port12-

bit current monitoring ADCs, DAC-programmable current

limit, and versatile fast shut-down of preselected ports.

Advanced power management host software is available

under a no-cost license. PD discovery uses a proprietary

dual-mode 4-point detection mechanism ensuring excel-

lent immunity from false PD detection. Midspan PSEs

are supported with 2-event classification and a 2 second

2-Point Forced Current

and V

Monitoring

PORT

1 Second Rolling I

Averaging

PORT

Supports 2-Pair and 4-Pair Output Power

1MHz I C Compatible Serial Control Interface

Available In a 40-Lead 6mm × 6mm (LTC4290)

and 24-Lead 4mm × 4mm (LTC4271) QFN Package

backofftimer.TheLTC4290/LTC4271includesanI Cserial

interface operable up to 1MHz.

APPLICATIONS

L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

PoE PSE Switches/Routers

PoE PSE Midspans

and LTPoE is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

TYPICAL APPLICATION

3.3V

0.1µF

DD33

XIO0

XIO1

OUTn

GP0

GP1

0.22µF

100V

S1B

PORTn

NO ISOLATION

CPD

CPA

MID

REQUIRED ON

I C INTERFACE

100Ω

–54V

RESET

MSD

AUTO

INT

•

GATEn

S1B

–54V

3.3V

0.25Ω

100Ω

SENSEn

CND

DPD

CNA

DPA

LTC4271

LTC4290

SCL

SDAIN

SDAOUT

0.22µF

100V

S1B

100Ω

PORT1

OUT1

–54V

100Ω

AD0

AD1

AD2

AD3

AD6

S1B

GATE1

0.25Ω

DND

DNA

–54V

SENSE1

VSSK AGND

DGND

CAP1

CAP2

2nF 2kV

1µF

0.1µF

>47µF

SYSTEM

BULK CAP

1µF

–54V

429071 TA01a

429071f

12 3 4 5 6 7...32

中文翻译

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与LTC4271IUF#PBF相关器件

型号	品牌	获取价格	描述	数据表
LTC4272	Linear	获取价格	12-Port PoE/PoE+/LTPoE++ PSE Controller
LTC4274	Linear	获取价格	Single IEEE 802.3at Power Over Ethernet Controller
LTC4274	ADI	获取价格	单通道 PoE+ PSE 控制器
LTC4274_1	Linear	获取价格	Single PoE+ PSE Controller High Capacitance Legacy Device Detection
LTC4274A	Linear	获取价格	12-Port PoE/PoE+/LTPoE++ PSE Controller
LTC4274A	ADI	获取价格	单通道 PoE / PoE+ / LTPoE++ PSE 控制器
LTC4274A_15	Linear	获取价格	Single PoE/PoE/LTPoE PSE Controller
LTC4274AIUHF-1#PBF	Linear	获取价格	LTC4274A/LTC4274C - Single PoE/PoE+/LTPoE++ PSE Controller; Package: QFN; Pins: 38; Temper
LTC4274AIUHF-2#TRPBF	Linear	获取价格	LTC4274A/LTC4274C - Single PoE/PoE+/LTPoE++ PSE Controller; Package: QFN; Pins: 38; Temper
LTC4274AIUHF-3#PBF	Linear	获取价格	LTC4274A/LTC4274C - Single PoE/PoE+/LTPoE++ PSE Controller; Package: QFN; Pins: 38; Temper

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