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參數(shù)資料
| 型號： | TPS2370DRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大小： | 426K |
| 代理商： | TPS2370DRG4 |
TPS2370
SLUS537C AUGUST 2002 REVISED MARCH 2004
IEEE 802.3af POWER INTERFACE SWITCH FOR
POWER OVER ETHERNET (PoE) POWERED DEVICES
FEATURES
D Integrated Power Interface Switch for IEEE
802.3af Powered Devices (PDs)
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 Minimal External Parts Count
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 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-
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.
At low input voltages (1.8 V to 10 V), the TPS2370
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.
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.
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.
TYPICAL APPLICATION
3
1
2
4
5
TPS2370
6
DC/DC
Converter/
Controller
8
Ethernet
Appliance
VREG
44 V
TO
57 V
V+
V
SMAJ54A
24.9 k
W
RLIM
CSS
CDCDCIN
RCLASS
UDG03057
0.1
mf
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.
PowerPAD
is a trademark of Texas Instruments. Bluetooth is a trademark of Bluetooth SIC, Inc.
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.
www.ti.com
Copyright
2002 2004, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2370EVM | 制造商:Texas Instruments 功能描述:TPS2370EVM - Bulk |
| TPS2370PW | 功能描述:熱插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2370PWG4 | 功能描述:熱插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2370PWR | 功能描述:熱插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2370PWRG4 | 功能描述:熱插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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