TPS2370

更新时间： 2024-11-13 22:52:59

品牌	Logo	应用领域
德州仪器 - TI		开关以太网以太网：16GBASE-T
页数	文件大小	规格书
13页	210K
描述
IEEE 802.3af POWER INTERFACE SWITCH FOR POWER OVER ETHERNET(PoE) POWERED DEVICES

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中文翻译

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数据手册
替代型号

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TPS2370 数据手册

ꢀꢁ ꢂ ꢃꢄ ꢅꢆ

www.ti.com

SLUS537C − AUGUST 2002 − REVISED MARCH 2004

ꢇꢈꢈ ꢈ ꢉ ꢆꢃ ꢊꢄ ꢋ ꢌ ꢁꢍ ꢎꢈ ꢏ ꢇ ꢐꢀꢈ ꢏꢑꢒꢓ ꢈ ꢂ ꢎꢇꢀ ꢓꢔ ꢑꢍ ꢏ

ꢁꢍꢎ ꢈꢏ ꢍꢕ ꢈꢏ ꢈꢀ ꢔꢈ ꢏꢐ ꢈꢀ ꢖ ꢁꢗ ꢈꢘ ꢁ ꢍꢎꢈ ꢏꢈ ꢙ ꢙ ꢈꢕꢇ ꢓ ꢈꢂ

FEATURES

DESCRIPTION

Integrated Power Interface Switch for IEEE

802.3af Powered Devices (PDs)

Acting as an interface between the power sourcing

equipment (PSE) and the powered device (PD), the

TPS2370 performs all detection, classification, inrush

current limiting, and switch FET control that is

necessary for compliance with the IEEE 802.3af

Standard. An internal 0.3-Ω FET provides maximum

power delivery. As an additional feature, the TPS2370

interfaces with the enable/soft-start signal of a dc-to-dc

converter, eliminating the need to have an accurate

UVLO in the dc-to-dc converter.

Provides PD Detection Signature

Provides PD Classification Signature

(Class 0−4)

Programmable Inrush Current Limit

Internal 0.3-Ω Low-Side FET

Interfaces to DC/DC Soft-Start for DC/DC

Enable

At low input voltages (1.8 V to 10 V), the TPS2370

draws less than 12 µA, allowing accurate sensing of the

external 24.9-kΩ discovery resistor. At input voltages

between 15 V and 20 V, an external resistor sets the

level of current to be drawn during classification mode.

TPS2370 is compatible with current as well as voltage

measurement schemes for classification. Above 20-V

input, the classification current is shut off, reducing

internal power dissipation.

Internal Thermal Protection – Disconnects PD

Load

Minimal External Parts Count

8-Pin SOIC, 8-Pin TSSOP Packages

APPLICATIONS

VoIP Phones

Internet Appliances

The TPS2370 drives an internal low-side FET for

control of the return side of the power path. The internal

FET is turned on when the input voltage reaches 40 V

and above. When the input voltage decreases, the FET

remains on until the input voltage drops to below 30 V.

Wireless LAN Access Points

Bluetooth Access Points

TYPICAL APPLICATION

V+

24.9 kꢀ

DCDCIN

0.1 ꢁf

TPS2370

44 V

LIM

DC/DC

Converter/

Controller

VREG

Ethernet

Appliance

57 V

SMAJ54A

CLASS

UDG−03057

V−

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.

PowerPAD is a trademark of Texas Instruments. Bluetooth is a trademark of Bluetooth SIC, Inc.

ꢁꢏ ꢍ ꢙꢚ ꢓ ꢀꢇ ꢍꢐ ꢙ ꢒꢀꢒ ꢛꢜ ꢌꢗ ꢝ ꢞꢋ ꢟꢛꢗꢜ ꢛꢠ ꢡꢢ ꢝ ꢝ ꢣꢜꢟ ꢋꢠ ꢗꢌ ꢤꢢꢥ ꢦꢛꢡ ꢋꢟꢛ ꢗꢜ ꢧꢋ ꢟꢣꢊ ꢁꢝ ꢗꢧꢢ ꢡꢟꢠ

ꢡ ꢗꢜ ꢌꢗꢝ ꢞ ꢟꢗ ꢠ ꢤꢣ ꢡ ꢛ ꢌꢛ ꢡ ꢋ ꢟꢛ ꢗꢜꢠ ꢤ ꢣꢝ ꢟꢨꢣ ꢟꢣ ꢝ ꢞꢠ ꢗꢌ ꢀꢣꢩ ꢋꢠ ꢇꢜꢠ ꢟꢝ ꢢꢞ ꢣꢜꢟ ꢠ ꢠꢟ ꢋꢜꢧ ꢋꢝ ꢧ ꢪ ꢋꢝ ꢝ ꢋ ꢜꢟꢫꢊ

ꢁꢝ ꢗ ꢧꢢꢡ ꢟ ꢛꢗ ꢜ ꢤꢝ ꢗ ꢡ ꢣ ꢠ ꢠ ꢛꢜ ꢬ ꢧꢗ ꢣ ꢠ ꢜꢗꢟ ꢜꢣ ꢡꢣ ꢠꢠ ꢋꢝ ꢛꢦ ꢫ ꢛꢜꢡ ꢦꢢꢧ ꢣ ꢟꢣ ꢠꢟꢛ ꢜꢬ ꢗꢌ ꢋꢦ ꢦ ꢤꢋ ꢝ ꢋꢞ ꢣꢟꢣ ꢝ ꢠꢊ

12 3 4 5 6 7...13

中文翻译

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TPS2370 替代型号

型号	品牌	替代类型	描述	数据表
TPS2375	TI	功能相似	IEEE 802.3af PoE POWERED DEVICE CONTROLLERS

与TPS2370相关器件

型号	品牌	获取价格	描述	数据表
TPS2370D	TI	获取价格	IEEE 802.3af POWER INTERFACE SWITCH FOR POWER OVER ETHERNET(PoE) POWERED DEVICES
TPS2370DG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8
TPS2370PW	TI	获取价格	IEEE 802.3af POWER INTERFACE SWITCH FOR POWER OVER ETHERNET(PoE) POWERED DEVICES
TPS2370PWG4	TI	获取价格	IEEE802.3af Power Interface Switch For Power-Over-Ethernet (PoE) Powered Devices (PD&#
TPS2371	TI	获取价格	LEGACY IEEE802.3AF COMPATIBLE POWER INTERFACE SWITCH FOR POWER OVER ETHERNET POWERED DEVIC
TPS2371D	TI	获取价格	LEGACY IEEE802.3AF COMPATIBLE POWER INTERFACE SWITCH FOR POWER OVER ETHERNET POWERED DEVIC
TPS2371DG4	TI	获取价格	Legacy/IEEE802.3af Compatible Power Interface Switch for PoE PDs 8-SOIC 0 to 70
TPS2371DRG4	TI	获取价格	DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8
TPS2371PW	TI	获取价格	LEGACY IEEE802.3AF COMPATIBLE POWER INTERFACE SWITCH FOR POWER OVER ETHERNET POWERED DEVIC
TPS2371PWG4	TI	获取价格	DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8, GREEN, PLASTIC, TSSOP-8

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