A power conversion circuit encompasses a rectifying circuit, a first switching element, a second switching element, a third switching element, a fourth switching element, a series connection of a capacitor and an induction coil, a voltage detection section and a control circuit. The series connection of the capacitor and the induction coil is connected between a first connection point and a second connection point. The control circuit switches a mode between a first operation mode in which pulse signals are input to the first switching element to the fourth switching element and a second operation mode in which the pulse signals are input to the first switching element and the second switching element, the third switching element is turned off and the fourth switching element is turned on.