Datasheet > LTC4274C_15

LTC4274C_15

更新时间： 2024-11-10 01:22:31

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
30页	360K
描述
Single PoE/PoE/LTPoE PSE Controller

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中文翻译

获取价格

数据手册

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LTC4274C_15 数据手册

LTC4274A/LTC4274C

Single PoE/PoE /LTPoE

PSE Controller

FEATURES

DESCRIPTION

Compliant with IEEE 802.3at Type 1 and 2

The LTC^®4274A is a single Power Sourcing Equipment

(PSE)controllercapableofdeliveringupto90WofLTPoE

Low Power Dissipation

power to a compatible LTPoE Powered Device (PD). A

0.25Ω Sense Resistance Per Channel

proprietarydetection/classificationschemeallowsmutual

Very High Reliability 4-Point PD Detection

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

2-Point Forced Voltage

2-Point Forced Current

High Capacitance Legacy Device Detection

1MHz I C Compatible Serial Control Interface

PSE controllers feature low-R external MOSFETs and

Midspan Backoff Timer

0.25Ω sense resistors which are especially important at

Supports 2-Pair and 4-Pair Output Power

theLTPoE currentlevelstomaintainthelowestpossible

Available in Multiple Power Grades

heat dissipation.

LTC4274A-1: LTPoE ™ 38.7W

LTC4274A-2: LTPoE 52.7W

TheLTC4274CtargetsfullyautomaticPSEsystemspower-

ing Type 1 (up to 13W) PDs.

LTC4274A-3: LTPoE 70W

LTC4274A-4: LTPoE 90W

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 I C serial interface

operable up to 1MHz.

LTC4274C: PoE 13W

Available in 38-Lead 5mm × 7mm QFN Package

APPLICATIONS

LTPoE PSE Switches/Routers

LTPoE PSE Midspans

IEEE 802.3at Type 1 PSE Switches/Routers

IEEE 802.3at Type 1 PSE Midspans

The LTC4274A/LTC4274C is available in multiple power

grades, allowing delivered PD power of 13W, 25.5W,

38.7W, 52.7W, 70W and90W. Thesecontrollers are avail-

able in a 38-lead 5mm × 7mm QFN package.

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.

TYPICAL APPLICATION

Complete Single-Port Ethernet High Power Source

10Ω

AD0 AD1 AD2 AD3

SCL SDAIN SDAOUT INT

3.3V

AUTO

MSD

RESET

MID

SHDN

0.1µF

SMAJ5.0A

10µF

DGND

AGND

LTC4274AC

10Ω

SENSE GATE OUT

SMAJ58A

1µF

BULK

–54V

0.22µF

100V

S1B

TVS

BULK

PORT

4274AC TA01

–54V

4274acfd

For more information www.linear.com/LTC4274A

12 3 4 5 6 7...30

中文翻译

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与LTC4274C_15相关器件

型号	品牌	获取价格	描述	数据表
LTC4274CIUHF#PBF	Linear	获取价格	LTC4274A/LTC4274C - Single PoE/PoE+/LTPoE++ PSE Controller; Package: QFN; Pins: 38; Temper
LTC4274CUHF#PBF	Linear	获取价格	LTC4274 - Single IEEE 802.3at Power Over Ethernet Controller; Package: QFN; Pins: 38; Temp
LTC4274IUHF#PBF	Linear	获取价格	LTC4274 - Single IEEE 802.3at Power Over Ethernet Controller; Package: QFN; Pins: 38; Temp
LTC42766C	Linear	获取价格	Quad PoE/PoE/LTPoE PSE Controller
LTC4278	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
LTC4278	ADI	获取价格	具同步 No-Opto 反激式控制器和 12V 辅助电源支持功能的 IEEE 802.3a
LTC4278_12	Linear	获取价格	Synchronous No-Opto Flyback Controller
LTC4278CDKD	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support
LTC4278CDKD#PBF	Linear	获取价格	LTC4278 - IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support;
LTC4278CDKDPBF	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support

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