Datasheet > LTC9111

LTC9111

更新时间： 2024-11-29 14:58:03

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管
页数	文件大小	规格书
20页	1102K
描述
工业 SPoE PD Controller

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LTC9111 数据手册

LTC9111

Industrial SPoE PD Controller

FEATURES

DESCRIPTION

The LTC^®9111 is an IEEE 802.3cg compliant Single-Pair

Power over Ethernet (SPoE) Powered Device (PD) con-

troller. A wide 2.3V to 60V operating range capability with

polarity correction make the LTC9111 particularly well

suited for classification-based systems in building and

factory automation.

IEEE 802.3cg Compliant

Wide Input Voltage Range: 2.3V to 60V

Supports Serial Communication Classification

Protocol (SCCP)

Wakeup Signature

Integrated 3.5V Standby Regulator

150µA Maximum Current During Classification

SCCP-based classification ensures full operating voltage

is applied by the Power Sourcing Equipment (PSE) only

when a valid PD is connected. The LTC9111 drives two

external N-channel MOSFET switches during classification

with micropower operation to minimize reservoir capaci-

tor requirements. An external N-channel MOSFET switch

isolates the output capacitance from the connector during

classification and inrush. A voltage supervisor enables the

external MOSFET when the PD input voltage exceeds the

ON voltage threshold for the configured class and after a

mandated delay. The EN output asserts after the controlled

GATE pin ramp-up. The MOSFET is disabled if the input

voltage drops below the OFF voltage threshold for the

configured class. The LTC9111 drives a pair of external

low-side N-channel MOSFETs with a low start-up voltage

of 1.6V for polarity correction with reduced power losses.

Drives Low-Side Bridge MOSFETs for Polarity Correction

Charge Pump Enhances External N-Channel MOSFET

Pin Programmable Class Configuration

Available in 12-Pin MSOP and DFN

4mm × 3mm Packages

APPLICATIONS

Building Automation

Factory Automation

Security Systems

Traffic Control Systems

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

TYPICAL APPLICATION

GATE

LTC9111

GND

OUT

47nF

150nF

FROM PSE

SNS1

DC/DC

CONVERTER

SNS2

BSS123

SCCP

REG

GND

BSS123

STBY

CLASSC

CLASSV

LGATE1

ADIN1100

LGATE2

2.2µF

9111 TA01

Rev. 0

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