Hub having complex power converters

A hub electrically connecting to electronic equipment and a portable device located in an external environment, comprising:

• a first connector, electrically connected to the electronic equipment;
• a second connector, electrically connected to the portable device;
• a controller, electrically connected between the first connector and the second connector, the controller has data transmission between the portable device and the electronic equipment mutually;
• a first current detector, electrically connected to the first connector for detecting an output voltage and an output current of the electronic equipment;
• a third direct current (DC)/DC converter, electrically connected to the first current detector;
• a fourth DC/DC converter, electrically connected to the third DC/DC converter and the second connector, converting an output voltage of the third DC/DC converter to a required charging voltage for the portable device;
• an energy storage, electrically connected between the third DC/DC converter and the fourth DC/DC converter;
• and
• an energy storage controlling circuit, electrically connected to the electronic equipment, the first current detector, the third DC/DC converter, and the energy storage, the energy storage controlling circuit has a first preset current value and a first preset voltage value;
• wherein, when the output current of the electronic equipment is less than the first preset current value, and the output voltage of the third DC/DC converter is more than the voltage of the energy storage, by the energy storage controlling circuit so that the portable device and the energy storage are charged by the electronic equipment at the same time;
• when the output current of the electronic equipment is more than the first preset current value or the output voltage of the electronic equipment is less than the first preset voltage value, the output voltage of the third DC/DC converter drops to the voltage of the energy storage by the energy storage controlling circuit, and the portable device are charged by the electronic equipment and the energy storage simultaneously.

A hub electrically connecting to electronic equipment and a portable device located in external environment via an Universal Serial Bus (USB) cable, the USB cable comprising a signal transmission line and a power transmission line, the hub comprising:

• a first connector, electrically connected to the electronic equipment via the USB cable;
• a second connector, electrically connected to the portable device via the USB cable;
• a controller, electrically connected between the first connector and the second connector, the controller has data transmission between the portable device and the electronic equipment mutually via signal transmission line;
• and
• a first direct current (DC)/DC converter, an input terminal of the first DC/DC converter is electrically connected to the electronic equipment via the power transmission line, an output terminal of the first DC/DC converter is electrically connected to the portable device via the power transmission line, the first DC/DC converter is applied to output stable voltage to the portable device;
• a fourth connector, electrically connected to an electronic device or a direct current power located in external environment;
• and
• a second DC/DC converter, an input terminal of the second DC/DC converter is electrically connected to the fourth connector, and the output terminal of the second DC/DC converter is electrically connected to the portable device.