Shunting device and method

The present invention relates to an apparatus and method for split. The shunt device comprises an input terminal, an output terminal, a control terminal of the shunt, series transistor, constant voltage generating unit, and a shunt feedback control circuit controlling unit. Shunt shunt control terminal provides a control interface. Series transistor input terminal receiving an input voltage and provides an output voltage and output current to the output terminal of the shunt device. Constant voltage generating unit generates a reference voltage. Feedback control circuit means coupled to the output terminal of the shunt transistor connected in series, for detecting an output current and outputting a current detection signal, and adjusting according to the reference signal and outputs a control signal to the transistor connected in series, means for controlling the shunt Output. The split control unit is coupled to the control terminal of the shunt and the shunt device feedback control circuit for detecting a current signal in accordance with a reference voltage to generate bus signals, and in accordance with the reference voltage, bus current detection signal and the reference signal generating signal.