參數(shù)資料
型號(hào)： TPS2070DAPR
廠商： Texas Instruments, Inc.
英文描述： FOUR-PORT USB HUB POWER CONTROLLERS
中文描述： 4端口USB集線器電源控制器
文件頁(yè)數(shù)： 24/29頁(yè)
文件大?。?/td> 472K
代理商： TPS2070DAPR
TPS2070, TPS2071
FOUR-PORT USB HUB POWER CONTROLLERS
SLVS287A
–
SEPTEMBER 2000
–
REVISED FEBRUARY 2001
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
universal serial bus (USB) applications
The universal serial bus (USB 1.1) interface is a 12-Mb/s, 1.5-Mb/s, or 480 Mb/s (USB 2.0), 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 or 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 TPS2070 and
TPS2071 can provide power-distribution solutions for hybrid hubs that need switching between BPH and SPH
according to power availability and application requirements.
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 V
BUS
Output 5.25 V to 4.75 at 500 mA
Bus-powered hubs must:
–
–
–
–
–
Enable/disable power to downstream ports
Power up at <100 mA
Limit inrush current (<44
and 10
μ
F)
Output 5.25 V to 4.4 at 100 mA
Not send power back upstream
Functions must:
–
–
–
Limit inrush currents
Power up at <100 mA
Not send power back upstream (SP functions)
The feature set of the TPS2070 and TPS2071 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 needs of both input and output ports on hubs, as well as the input ports for
bus-powered functions
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS2071DAP 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAP 制造商:Texas Instruments 功能描述:IC PCMCIA PWR I/F SW 32-HTSSOP 制造商:Texas Instruments 功能描述:IC, PCMCIA PWR I/F SW 32-HTSSOP
TPS2071DAPG4 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAPR 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus 4 Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS2071DAPRG4 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus 4 Port USB Hub RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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