參數(shù)資料
型號(hào)： TPS2051BQDRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁數(shù)： 10/31頁
文件大小： 695K
代理商： TPS2051BQDRQ1
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
SLVS782A – NOVEMBER 2007 – REVISED JUNE 2010
www.ti.com
Low-Power and High-Power Bus-Powered Functions
Both low-power and high-power bus-powered functions obtain all power from upstream ports; low-power
functions always draw less than 100 mA; high-power functions must draw less than 100 mA at power up and can
draw up to 500 mA after enumeration. If the load of the function is more than the parallel combination of 44
and 10 mF at power up, the device must implement inrush current limiting (see Figure 26).
Figure 26. 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 27 and Figure 28).
18
Copyright 2007–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2041B-Q1 TPS2042B-Q1 TPS2051B-Q1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2051C 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current-Limited, Power-Distribution Switches Deglitched Fault Reporting
TPS2051CDBVEVM-636 功能描述:電源管理IC開發(fā)工具 TPS2051C EVAL MOD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS2051CDBVR 功能描述:電源開關(guān) IC - USB SGL CHANNEL,CRNT-LTD USB PWR DIST SWITCH 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
TPS2051CDBVT 功能描述:電源開關(guān) IC - USB SGL CHANNEL,CRNT-LTD USB PWR DIST SWITCH 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
TPS2051D 功能描述:電源開關(guān) IC - USB 0.7A 2.7-5.5V Hi 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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