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2377

更新时间： 2024-10-28 02:55:51

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
23页	671K
描述
IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY

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2377 数据手册

TPS2375-1

D−8

PW−8

TPS2377-1

www.ti.com

SLVS570–MARCH 2005

IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY

FEATURES

APPLICATIONS

•

VoIP Phones

•

Auto-Retry After Current-Limit Fault

TPS2375-1: IEEE 802.3af Thresholds

TPS2377-1: Legacy Thresholds

WLAN Access Points

Security Cameras

Internet Appliances

POS Terminals

Fully Supports IEEE 802.3af Specification

Integrated 0.58-Ω, 100-V, Low-Side Switch

15-kV System Level ESD Capable

Programmable Inrush Current Control

Fixed 450-mA Current Limit

PRODUCT SELECTOR

2375-1

2377-1

2375

802.3af

Latch

2376

Adjustable

Latch

2377

Legacy

Latch

UVLO

802.3af

Legacy

Protection Auto-Retry Auto-Retry

Package PW

Open-Drain, Power-Good Reporting

Industrial Temperature Range: -40°C to 85°C

8-Pin SOIC and TSSOP Packages

D, PW

D,PW

DESCRIPTION

These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE

802.3af-compliant powered device (PD). The TPS2375-1 and TPS2377-1 are second generation PDCs (PD

Controllers) featuring a 100-V ratings and true open-drain, power-good function. These devices are auto-retry

versions of selected TPS2375 family members. Information on the TPS2375/6/7 devices can be found on the

TPS2375/6/7 data sheet (SLVS525A).

In addition to the basic functions of detection, classification, and undervoltage lockout (UVLO), these controllers

include an adjustable inrush limiting feature. The TPS2375-1 has 802.3af-compliant UVLO limits, and the

TPS2377-1 has legacy UVLO limits.

The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af

specifications to accommodate the required input diode bridges used to make the PD polarity insensitive.

Additional resources can be found on the TI Web site www.ti.com.

Power Up

RJ-45

and

Detect

Classify

Inrush

Pair

Data to

Ethernet PHY

Class 3

Input

Current

DF01S

2 Places

(PG-RTN)

DET

ILIM

Spare

Pair

CLASS

RTN

Spare

Pair

Note: All Voltages With Respect to VSS.

Notes:

1) Class 3 PD depicted

2) PG pullup resistor is optional.

Data to

Pair

Ethernet PHY

Figure 1. Typical Application Circuit and Start-Up Waveforms

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...23

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与2377相关器件

型号	品牌	获取价格	描述	数据表
2377-1	TI	获取价格	IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY
2377-1	KR	获取价格	Bandpass Filter
2377-2	KR	获取价格	Bandpass Filter
2377-3	KR	获取价格	Bandpass Filter
2377-45-BC	BOURNS	获取价格	MSP Maximum Duty Station Protector
2377-45-BC-IDC	BOURNS	获取价格	MSP Maximum Duty Station Protector
2377-45-HS	BOURNS	获取价格	MSP Maximum Duty Station Protector
2377-45-HS-IDC	BOURNS	获取价格	MSP Maximum Duty Station Protector
2378	KR	获取价格	Video Filter
2378-35-BC	BOURNS	获取价格	MSP Heavy Duty Station Protector

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