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| 型号： | TPS2371DR |
| 厂商： | Texas Instruments |
| 文件页数： | 3/19页 |
| 文件大小： | 0K |
| 描述： | IC PWR INTRFCE SW FOR POE 8-SOIC |
| 标准包装： | 2,500 |
| 应用： | 用于以太网供电（PoE）设备的电源接口开关 |
| 接口： | IEEE 802.3af |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
TPS2371
SLUS566A JULY 2003 REVISED NOVEMBER 2003
11
www.ti.com
APPLICATION INFORMATION
Figure 1 shows an application where 40 V < VIN < 57 V. In this case, the brick supply is greater then 40 V and
goes through TPS2371.
RDET
RLIM
CSS
CDCDCIN
RCLASS
UDG03094
3
1
2
4
5
TPS2371
6
DC/DC
Converter
8
Ethernet
Device
VREG
V+
V
44 V
TO
57 V
PoE Powered Device Front End
RJ45
DC BRICK
SUPPLY
3
6
1
2
4
5
7
8
RX
TX
S
P
A
R
E
7
V
CLIM
Figure 1. For Applications 40 V < VIN < 57 V.
Figure 2 shows an application where VIN < 36 V. In this application, the brick supply is bypassing the hot swap
switch. Consequently, the dc-to-dc converter can operate from any voltage. However, for VBRICK < 23 V, a Class
0 resistor (RCLASS = 4.42 k) is recommended. This minimizes the power dissipation in TPS2371 if VBRICK falls
in the classification voltage range (15 V to 20 V). The 80-
A current sink on EN_DC pin is enabled only if
VDD > 36 V.
RDET
RLIM
CSS
CDCDCIN
RCLASS
UDG03095
CLIM
3
1
2
4
5
TPS2371
6
DC/DC
Converter
8
Ethernet
Device
VREG
PoE POWERED DEVICE FRONT END
RJ45
3
6
1
2
4
5
RX
TX
V+
V
44 V
TO
57 V
7
V
DC BRICK
SUPPLY
5
7
8
S
P
A
R
E
Figure 2. For Applications VIN < 40 V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2371DRG4 | 功能描述:热插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2371PW | 功能描述:热插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2371PWG4 | 功能描述:热插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2371PWR | 功能描述:热插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2371PWRG4 | 功能描述:热插拔功率分布 Legacy/IEEE802.3af Comp Pwr InterfSw RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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