UNIVERSAL SERIES (USB) BUS CHARGER FOR A MOBILE DEVICE.

摘要

A charging device (110) for charging a rechargeable power source in a mobile device (132) through a Universal Serial Bus (USB) port, comprising: a power converter (112) configured to receive a voltage of input from an external power source (130) and generate a charger output that has a regulated voltage; a signal generator (114) configured to generate a charger configuration signal; and a USB connector (116) to couple the charger output and the charger configuration signal to the USB port (134) of the mobile device (132) with the USB connector (116) having a voltage bus (118) contact (Vbus) ) coupled to the charger output, a positive data contact (120) (D +) coupled to the charger configuration signal, and a negative data contact (122) (D-) coupled to the charger configuration signal, being transmitted the configuration signal of the charger simultaneously to the contacts (120, 122) D + and D-, so that the contacts (120, 122) D + and D- are continuously either in a high logic state or both in a low logical state; characterized in that the charger configuration signal is a periodic digital signal having a preselected frequency and duty cycle, in which the frequency and the duty cycle of the charger configuration signal are selected to identify operational characteristics of the charger apparatus (110), including at least the values of the regulated voltage and a maximum current capacity of the charger output, and the mobile device is configured to identify the operating characteristics of the charger apparatus from the frequency and duty cycle of the charger configuration signal and apply the charger output to recharge the rechargeable power source.