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參數(shù)資料
| 型號(hào)： | TPS2052BDG4 |
| 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)： | 13/51頁 |
| 文件大?。?/td> | 1451K |
| 代理商： | TPS2052BDG4 |
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IN
OC
EN
GND
0.1
F
2, 3
5
4
6, 7, 8
0.1
F
120
F
GND
OUT
TPS2041B
Power Supply
D+
D
VBUS
Downstream
USB Ports
USB
Control
3.3 V
5 V
1
SLVS514K – JUNE 2010 – REVISED DECEMBER 2008
www.ti.com
UNIVERSAL SERIAL BUS (USB) APPLICATIONS
The universal serial bus (USB) interface is a 12-Mb/s, or 1.5-Mb/s, multiplexed serial bus designed for
low-to-medium bandwidth PC peripherals (e.g., keyboards, printers, scanners, and mice). The four-wire USB
interface is conceived for dynamic attach-detach (hot plug-unplug) of peripherals. Two lines are provided for
differential data, and two lines are provided for 5-V power distribution.
USB data is a 3.3-V level signal, but power is distributed at 5 V to allow for voltage drops in cases where power
is distributed through more than one hub across long cables. Each function must provide its own regulated 3.3 V
from the 5-V input or its own internal power supply.
The USB specification defines the following five classes of devices, each differentiated by power-consumption
requirements:
Hosts/self-powered hubs (SPH)
Bus-powered hubs (BPH)
Low-power, bus-powered functions
High-power, bus-powered functions
Self-powered functions
Self-powered
and
bus-powered
hubs
distribute
data
and
power
to
downstream
functions.
The
TPS204xB/TPS205xB can provide-power distribution solutions to many of these classes of devices.
HOST/SELF-POWERED AND BUS-POWERED HUBS
Hosts and self-powered hubs have a local power supply that powers the embedded functions and the
downstream ports (see Figure 30 and Figure 31). This power supply must provide from 5.25 V to 4.75 V to the
board side of the downstream connection under full-load and no-load conditions. Hosts and SPHs are required to
have current-limit protection and must report overcurrent conditions to the USB controller. Typical SPHs are
desktop PCs, monitors, printers, and stand-alone hubs.
Figure 30. Typical One-Port USB Host / Self-Powered Hub
20
Copyright 2010–2008, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
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| TPS2042BDRBT | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
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| TPS2041BDBVR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| TPS2051BD | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| TPS2051BDGN | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2052BDGN | 功能描述:電源開關(guān) IC - USB Current-Limited 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 |
| TPS2052BDGN | 制造商:Texas Instruments 功能描述:POWER DISTRIBUTION SWITCH IC 制造商:Texas Instruments 功能描述:IC, CURRENT LIMITED POWER SW 5.5V MSOP-8 |
| TPS2052BDGNG4 | 功能描述:電源開關(guān) IC - USB Current-Limited 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 |
| TPS2052BDGNR | 功能描述:電源開關(guān) IC - USB Current-Limited 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 |
| TPS2052BDGNRG4 | 功能描述:電源開關(guān) IC - USB Current-Limited 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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