參數(shù)資料
型號： TPS2371DRG4
廠商： Texas Instruments
文件頁數(shù)： 1/19頁
文件大?。?/td> 0K
描述： IC PWR INTRFCE SW FOR POE 8-SOIC
標準包裝： 2,500
應用： 用于以太網(wǎng)供電（PoE）設(shè)備的電源接口開關(guān)
接口： IEEE 802.3af
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應商設(shè)備封裝： 8-SOIC
包裝： 帶卷 (TR)
安裝類型： 表面貼裝
TPS2371
SLUS566A JULY 2003 REVISED NOVEMBER 2003
LEGACY/IEEE802.3af COMPATIBLE POWER INTERFACE SWITCH
FOR POWER OVER ETHERNET (PoE) POWERED DEVICES
1
www.ti.com
FEATURES
D Integrated Power Interface Switch for IEEE
802.3af Powered Devices (PDs)
D Precision UVLO Thresholds
D 20-ms UVLO Off-Time Delay
D Provides PD Detection Signature
D Provides PD Classification Signature
(Class 04)
D Programmable Inrush Current Limit
D Internal 0.3- Low-Side FET
D Interfaces to DC/DC Soft-Start for DC/DC
Enable
D Internal Thermal Protection – Disconnects
PD Load
D 8-Pin SOIC, 8-Pin TSSOP Packages
APPLICATIONS
D VoIP Phones
D Internet Appliances
D Wireless LAN Access Points
D Bluetooth Access Points
DESCRIPTION
Acting as an interface between the Power Source
Equipment (PSE) and the Powered Device (PD),
the TPS2371 performs all detection, class
ification, inrush current limiting, and switch FET
control that is necessary for compatibility with
Legacy/IEEE 802.3af Standard. The TPS2371
incorporates precision UVLO thresholds and
hysteresis as well as a UVLO off-time delay to
enable Legacy IEEE802.3af PoE compatibilty. An
internal 0.3-
FET provides maximum power
delivery. As an additional feature, the TPS2371
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.
At low input voltages (1.8 V to 10 V), the TPS2371
draws less than 12
A, allowing accurate sensing
of the external 24.9-k
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. TPS2371 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.
3
1
2
4
5
TPS2371
6
DC/DC
Converter/
Controller
8
Ethernet
Appliance
VREG
44 V
TO
57 V
V+
V
7
SIMPLIFIED APPLICATION DIAGRAM
RDET
RLIM
CSS
CDCDCIN
RCLASS
CBYPASS
CDEL
UDG03092
5 V
CLIM
SMAJ54A
Bluetooth is a trademark of the Bluetooth SIG, Inc.
Copyright
1999 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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參數(shù)描述
TPS2371PW 功能描述:熱插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2371PWG4 功能描述:熱插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2371PWR 功能描述:熱插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2371PWRG4 功能描述:熱插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2372-4RGWT 功能描述:TPS2372 制造商:texas instruments 系列:* 包裝:剪切帶（CT） 零件狀態(tài):在售 封裝/外殼:20-VQFN 裸露焊盤 供應商器件封裝:20-VQFN（5x5） 標準包裝:1
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