Patent ID: 8928248
Filing Date: 2015-01-06
Classification: G05F,H02M,H05B

Abstract:
1. A step up/down converter, comprising: an inductor; a first switch, one end of which is connected to an input power source, and the other end of which is connected to one end of the inductor, the input power source being configured to generate an input DC voltage in which a reference potential is a reference voltage; a second switch, one end of which is connected to the one end of the inductor, and the other end of which is connected to a reference potential applying unit for applying the reference potential; a third switch, one end of which is connected to other end of the inductor; a fourth switch, one end of which is connected to the other end of the inductor; a capacitor circuit element, connected between the other end of the third switch and the other end of the fourth switch, the capacitor circuit element being configured to charge electric charge based on the input DC voltage according to a connecting state from the first switch to the fourth switch, and to generate an output voltage applied to a load based on the charged electric charge; a detecting resistor connected between the other end of the second switch and the other end of the third switch, and configured to detect an inductor current flowing through the inductor; and a control circuit configured to perform control for driving from the first switch to the fourth switch based on the inductor current detected by the detecting resistor.