參數(shù)資料
型號(hào)： TPS2051BDBV
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封裝： PLASTIC, SOT-23, 5 PIN
文件頁數(shù)： 15/51頁
文件大?。?/td> 1451K
代理商： TPS2051BDBV
IN
OC1
OC2
2
8
3
5
4
7
0.1
F
10
F
Internal
Function
OUT1
Power Supply
3.3 V
EN1
6
0.1
F
10
F
OUT2
Internal
Function
0.1
F
10
F
USB
Control
GND
VBUS
D
D+
EN2
GND
1
TPS2042B
SLVS514K – JUNE 2010 – REVISED DECEMBER 2008
www.ti.com
Figure 32. High-Power Bus-Powered Function (Example, TPS2042B)
USB POWER-DISTRIBUTION REQUIREMENTS
USB can be implemented in several ways, and, regardless of the type of USB device being developed, several
power-distribution features must be implemented.
Hosts/self-powered hubs must:
–
Current-limit downstream ports
–
Report overcurrent conditions on USB VBUS
Bus-powered hubs must:
–
Enable/disable power to downstream ports
–
Power up at <100 mA
–
Limit inrush current (<44
and 10 mF)
Functions must:
–
Limit inrush currents
–
Power up at <100 mA
The feature set of the TPS204xB/TPS205xB allows them to meet each of these requirements. The integrated
current-limiting and overcurrent reporting is required by hosts and self-powered hubs. The logic-level enable and
controlled rise times meet the need of both input and output ports on bus-powered hubs, as well as the input
ports for bus-powered functions (see Figure 33 through Figure 36).
22
Copyright 2010–2008, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2051BDBVR 功能描述:電源開關(guān) IC - USB Sngl Current Ltd Pwr Dstrbtn Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
TPS2051BDBVR 制造商:Texas Instruments 功能描述:SWITCH CURRENT LTD 1A 5SOT2 制造商:Texas Instruments 功能描述:POWER DISTRIBUTION LOAD SWITCH IC (NW)
TPS2051BDBVR 制造商:Texas Instruments 功能描述:IC, CURRENT LIMITED PWR SW, 5.5V SOT23-5
TPS2051BDBVRG4 功能描述:電源開關(guān) IC - USB Sgl Crnt-Ltd Pwr- Dist Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
TPS2051BDBVT 功能描述:電源開關(guān) IC - USB Sgl Crnt-Ltd Pwr- Dist Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube
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