參數資料
| 型號： | TPS2371PWRG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 1/19頁 |
| 文件大小： | 0K |
| 描述： | IC PWR INTRFCE SW FOR POE 8TSSOP |
| 標準包裝： | 2,000 |
| 應用： | 用于以太網供電（PoE）設備的電源接口開關 |
| 接口： | IEEE 802.3af |
| 封裝/外殼： | 8-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 8-TSSOP |
| 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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| TPS2372-4RGWT | 功能描述:TPS2372 制造商:texas instruments 系列:* 包裝:剪切帶（CT） 零件狀態: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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| TPS23750EVM-107 | 功能描述:電源管理IC開發工具 TPS23750 Eval Mod Buck RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS23750EVM-108 | 功能描述:電源管理IC開發工具 TPS23750 Eval Mod Flyback RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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