參數(shù)資料
型號(hào)： TPS2045BD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： PLASTIC, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 9/28頁(yè)
文件大小： 994K
代理商： TPS2045BD
www.ti.com
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
TPS2046B
USB POWER-DISTRIBUTION REQUIREMENTS
SLVS532C – JULY 2004 – REVISED OCTOBER 2007
Figure 25. High-Power Bus-Powered Function (Example, TPS2046B)
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 μF)
Functions must:
–
Limit inrush currents
–
Power up at <100 mA
The feature set of the TPS204xB/TPS2055B 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 26 through Figure 27).
Copyright 2004–2007, Texas Instruments Incorporated
17
Product Folder Link(s): TPS2045B TPS2055B TPS2046B TPS2047B
相關(guān)PDF資料
PDF描述
TPS2045BDBV 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
TPS2055BD 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
TPS2211APWPR 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
TPS2211APW 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
TPS2211APWG4 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2045D 功能描述:電源開關(guān) IC - USB .345A 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
TPS2045DG4 功能描述:電源開關(guān) IC - USB .345A 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
TPS2045DR 功能描述:電源開關(guān) IC - USB .345A 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
TPS2045DRG4 功能描述:電源開關(guān) IC - USB DUAL HI-SIDE MOSFET 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
TPS2045P 功能描述:電源開關(guān) IC - USB .345A 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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