Datasheet > LTC9103

LTC9103

更新时间： 2024-11-29 14:57:35

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
50页	3413K
描述
8 通道 IEEE802.3bt (PoE 2) PSE 模拟控制器

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LTC9103 数据手册

LTC9101-1/

LTC9102/LTC9103

48-Port IEEE 802.3bt PoE PSE Controller

DESCRIPTION

FEATURES

Fully Compliant IEEE 802.3bt Type 3 and 4 PSE

Fully Compliant IEEE 802.3at Type 2 PSE

The LTC^®9101-1/LTC9102/LTC9103 chipset is a 48-port

power sourcing equipment (PSE) controller designed for use

in IEEE 802.3at Type 2, 802.3bt Type 3 and 4 compliant Power

over Ethernet (PoE) systems. The LTC9101-1/LTC9102/

LTC9103 is designed to power compliant 802.3af, 802.3at,

and 802.3bt PDs. The LTC9101-1/LTC9102/LTC9103 chip-

set delivers lowest-in-industry heat dissipation by utilizing

low-R_DS(ON)external MOSFETs and 0.1Ω sense resistance

per power channel. A transformer-isolated communication

protocol replaces expensive opto-couplers and complex iso-

lated 3.3V supply, resulting in significant BOM cost savings.

Software-Compatible with LTC4291-1/LTC4292

Up to 48 PSE Ports with One Power Channel per Port

Up to 24 PSE Ports with Two Power Channels per Port

ECC-Protected eFlash and Data RAMs

Low Power Path Dissipation per Channel

100mΩ Sense Resistance

30mΩ or Lower MOSFET R

DS(ON)

Chipset Provides Electrical Isolation

Eliminates Optos and Isolated 3.3V Supply

Very High Reliability Multipoint PD Detection

Advanced power management features include per-port

14-bit current/power monitoring, programmable current/

power limits, and versatile fast shut-down of preselected

ports. An advanced power management host software

layer is available. PD detection uses a proprietary multi-

point detection mechanism ensuring excellent immunity

from false PD identification. Autoclass and 5-event physi-

cal classification are supported. The LTC9101-1/LTC9102/

LTC9103 includes an I²C serial interface operable up to

Connection Check Distinguishes Single-

Signature and Dual-Signature PDs

Continuous Per-Port Power and Current Monitoring

1MHz I C Compatible Serial Control Interface

Pin or I C Programmable PD Power

Available in 24-Lead 4mm × 4mm (LTC9101-1) and

a 64-Lead 7mm × 11mm (LTC9102/LTC9103) QFN

Packages

1MHz. The LTC9101-1/LTC9102/LTC9103 is pin or I C pro-

grammable to negotiate PD delivered power up to 71.3W.

APPLICATIONS

PoE PSE Switches/Routers and Midspans

All registered trademarks and trademarks are the property of their respective owners.

TYPICAL APPLICATION

>47µF

ID:11b

ID:10b

ID:01b

0.1µF

3.3V

ID:00b

1µF

100V

CFG2

TX1

0.1µF

100V

CFG1

CFG0

S1B

AGND

OUT1

ISOLATION

AUTO

RESET

MSD

CPD

CPA

GATE1

TX2

•

SENSE1

4PVALID

LTC9102/LTC9103

(NO I C

0.1Ω

ISOLATION

CND

CNA

LTC9101-1

VSSK1

REQUIRED)

TX3

FLASH

0.1µF

100V

INT

S1B

OUT2

DPD

DPA

SCL

•

SDAIN

GATE2

SDAOUT

TX4

SENSE2

DND

DNA

AD2

AD3

0.1Ω

1000pF

2kV

1000BASE-T

RJ45

VSSK2

DGND

EE ONE 4-PAIR PORT SHOWN

9101123 TA01a

Rev. 0

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