Abstract: A charging converter has a first protocol interface and a second protocol interface mounted on a body. The body further has a switching circuit. Each of the first protocol interface and the second protocol interface has a power pin, a ground pin and two data pins. The power pin of the first protocol interface is connected to the power pin of the second protocol interface. The data pins of the second protocol interface are connected to the data pins of the first protocol interface through the switching circuit. The switching circuit serves to switch to a synchronous mode or a fast charging mode. When the synchronous mode is selected, the power and data channels between the first protocol interface and the second protocol interface are simultaneously established. When the fast charging mode is selected, only the power channel is established to accelerate the charging speed.