Patent ID: 6504343
Filing Date: 2003-01-07
Classification: G06F,H02J

Abstract:
A charging system for charging a plurality of portable devices, each portable device comprising a charging port for receiving a corresponding operating voltage of the portable device, the charging system comprising:a plurality of transformers for transforming a plurality of input voltages into a standard voltage, each transformer comprising an output port for outputting the standard voltage carried by direct current; at least a branch converter, each branch converter comprising: an input port for receiving the standard voltage outputted from the output port of the transformer; a power conversion circuit for transforming the standard voltage into a transmission voltage and the corresponding operating voltage of the portable device, each of the transmission voltage and the operating voltage being carried by direct current, a transmission port for outputting the transmission voltage; and an output port, which corresponds to the charging port of the portable device, for outputting the operating voltage of the portable device; and a plurality of converters for transforming the transmission voltage into a plurality of operating voltages according to the portable devices, each converter comprising an input port corresponding to the transmission port of the branch converter for receiving the transmission voltage and an output port corresponding to the charging port of the portable device for outputting the operating voltage of the portable device; wherein when two portable devices need to be charged, a user connects the branch converter belonging to one of the portable devices to the transformer, and connects the input port of the converter belonging to another portable device to the branch converter,so that the two portable devices are both charged by the input voltage of the transformer at the same time.