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TPS2371PWR

更新时间: 2024-11-14 13:00:31
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德州仪器 - TI 开关以太网以太网:16GBASE-T
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TPS2371PWR 数据手册

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SLUS566A − JULY 2003 − REVISED NOVEMBER 2003  
FEATURES  
DESCRIPTION  
D
Integrated Power Interface Switch for IEEE  
802.3af Powered Devices (PDs)  
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.  
D
D
D
D
D
D
D
D
D
Precision UVLO Thresholds  
20-ms UVLO Off-Time Delay  
Provides PD Detection Signature  
Provides PD Classification Signature  
(Class 0−4)  
Programmable Inrush Current Limit  
Internal 0.3-Low-Side FET  
Interfaces to DC/DC Soft-Start for DC/DC  
Enable  
Internal Thermal Protection – Disconnects  
PD Load  
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-kdiscovery 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.  
8-Pin SOIC, 8-Pin TSSOP Packages  
APPLICATIONS  
D
D
D
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VoIP Phones  
Internet Appliances  
Wireless LAN Access Points  
BluetoothAccess Points  
SIMPLIFIED APPLICATION DIAGRAM  
V+  
R
DET  
8
C
C
DCDCIN  
BYPASS  
3
1
7
TPS2371  
44 V  
TO  
57 V  
R
LIM  
C
DEL  
DC/DC  
Converter/  
Controller  
VREG  
Ethernet  
Appliance  
C
LIM  
6
5
R
CLASS  
SMAJ54A  
C
SS  
2
4
5 V  
V−  
UDG−03092  
Bluetooth is a trademark of the Bluetooth SIG, Inc.  
ꢀꢪ  
Copyright 1999 − 2003, Texas Instruments Incorporated  
ꢦ ꢪ ꢧ ꢦꢢ ꢣꢳ ꢞꢓ ꢒ ꢭꢭ ꢫꢒ ꢤ ꢒ ꢥ ꢪ ꢦ ꢪ ꢤ ꢧ ꢑ  
1
www.ti.com  

TPS2371PWR 替代型号

型号 品牌 替代类型 描述 数据表
TPS2371PWG4 TI

类似代替

DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8, GREEN, PLASTIC, TSSOP-8
TPS2371DRG4 TI

类似代替

DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8
TPS2371DG4 TI

类似代替

Legacy/IEEE802.3af Compatible Power Interface Switch for PoE PDs 8-SOIC 0 to 70

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