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| 型号： | TPS2064DRBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, SON-8 |
| 文件页数： | 7/33页 |
| 文件大小： | 1022K |
| 代理商： | TPS2064DRBR |
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SLVS553K
– MARCH 2005 – REVISED MAY 2011
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
SPHs and BPHs distribute data and power to downstream functions. The TPS206x has higher current capability
than required by one USB port; so, it can be used on the host side and supplies power to multiple downstream
ports or functions.
HOST/SELF-POWERED AND BUS-POWERED HUBS
Hosts and SPHs have a local power supply that powers the embedded functions and the downstream ports (see
Figure 22). 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.
Copyright
2005–2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
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| TPS2064DRBT | 功能描述:电源开关 IC - USB Dual 1.5A Crnt-Ltd, Pwr Dist Sw RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2064EVM-296 | 功能描述:交换机 IC 开发工具 TPS2064EVM-296 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
| TPS2065 | 制造商:TI 制造商全称:Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES |
| TPS2065-1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES |
| TPS2065-1EVM-292 | 功能描述:交换机 IC 开发工具 TPS2065-1EVM-292 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
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