POWER REGULATING CIRCUIT, CHARGING DEVICE AND POWER SUPPLY MODE SETTING METHOD THEREOF

A power supply mode setting method is provided, with said method including: in a detection time period, controlling the power regulating circuit in a power transmission state, and detecting a charge current to obtain a detected value; determining in which one of a TC range, a CV range and a CC range the detected value locates; adjusting the power regulating circuit to a power off state for a first duration when the detected value is in the TC range; keeping the power regulating circuit in the power transmission state for a second duration when the detected value is in the CV range; and keeping the power regulating circuit in the power transmission state for a third duration when the detected value is in the CC range. A power regulating circuit and a charging device adapting said method are also provided.