Path management system and method suitable for charging chip

The embodiment of the invention provides a path management system and method suitable for a charging chip, and the method comprises the steps: sequentially controlling a fourth power tube switch Q4 through a current control loop and a voltage control loop in a change process of a load current Iload, maintaining a charging current Ichg to a charging reference current Ichgreg through the current control loop, and enabling the current Ichgreg to be a charging reference current Ichgreg through the voltage control loop; the conversion output voltage Vsys is maintained to be the conversion output reference voltage Vsysreg through the voltage control loop, and meanwhile, the output current IL of the inductor L and the input end current Ibus and the input end voltage Vbus of the first power tube switch Q1 are respectively maintained in respective preset ranges in combination with regulation and control of the PWM control module. The load is effectively and dynamically tracked by collecting the charging current Ichg a