Combined data/power supply cable for mobile phones
Original Publication Date: 2002-Sep-01
Included in the Prior Art Database: 2003-Jul-23
Current consumption during long data transfer has a main impact on battery life when the phone’s power supply is not connected to the data cable. Until now there are some cables that have a separate plug in the data cable to connect the mobile’s power supply but usually the communication is serial and slow and some modified Universal Serial Bus (USB) cables to use the power supply from a PC, but these cables only supply an emergency power supply but no data exchange capability. That’s why it is suggested to use a data cable with a proprietary connector on the mobile side which is connected to a PC’s USB port. The baseband proces- sor in the mobile phone has to run a USB protocol, but the power supply from the PC is switched to charge the mobile battery. Typically the current provided by charger in a mobile is 650mA which is near the 500mA specified for the USB current on a single port.