Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TPS2371 Datasheet(PDF) 1 Page - Texas Instruments

Click here to check the latest version.
Part No. TPS2371
Description  LEGACY IEEE802.3AF COMPATIBLE POWER INTERFACE SWITCH FOR POWER OVER ETHERNET POWERED DEVICES
Download  14 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo 

TPS2371 Datasheet(HTML) 1 Page - Texas Instruments

 
Zoom Inzoom in Zoom Outzoom out
 1 / 14 page
background image
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 0−4)
D Programmable Inrush Current Limit
D Internal 0.3-Ω 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-
Ω 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
µA, allowing accurate sensing
of the external 24.9-k
Ω 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
UDG−03092
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.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn