一种功率转换电路包括：输入端、第一开关组件、第二开关组件、第三开关组件、第四开关组件、电容器、电感器，以及控制器，用于控制该第一至第四开关组件导通或断开，使负载的电压重复地经由运行（1）-（2）调节，（1）对电容器充电使第二电流流入电感器前，用第一电流对电感器充电；（2）对电容器放电使第四电流流入电感器前，用第三电流对电感器充电。

A power conversion circuit includes an input terminal, a first switching element, a second switching element, a third switching element, a fourth switching element, a capacitor; an inductor; and a controller configured to control the switching elements to be switched ON/OFF, such that a voltage at the load is regulated by repetitively (1) charging the inductor with a first current before charging the capacitor causing a second current to flow in the inductor and (2) charging the inductor with a third current before discharging the capacitor causing a fourth current to flow in the inductor.