power usb, computer hardware, usb

Our power USB can combine 5V and 12V power plug,and a standard USB.2.0 interface,as a kind of extra power supply for some computer & USB peripherals & equipments,such as scanner, printer.It can be also used as a IC card built in the computer or used as a separate USB device connecting with some consumer electronics, such as ipod, digital camera ,mini hard drive or cell phone charger ...etc. It can provide customers with multiple choices of USB application. (power supply use only, USB signal transmission useonly or use both functions together) .Kindly see the following information and literature about our poweredUSB .PoweredUSB is an enhanced USB connection with added pins for more power to the attached peripheral. PoweredUSB provides a single cable connection that supplies both the standard USB communication signals and two additional wire pairs for extra power. The design of PoweredUSB and it ‚¬ connectors allow for hot-plugging. This combined with Plug-and-Play operating systems allows PoweredUSB to be easily maintained and supported in the retail environment. One of the limitations of standard USB is the amount of +5V current available to supply attached peripherals. Normally, 500mA is available at each host port and each powered external hub port. This amount of current is sufficient for most PC type peripherals like mice and keyboards. When the power requirements exceed the 500mA limitation, external peripherals require the use of an external power supply (brick) to supply the necessary power requirements. This limitation takes away from the true "Plug-and-Play" idea conceived for USB peripheral