Patent ID: 9479055
Filing Date: 2016-10-25
CPC Classification: H02M,H03K

Claim Text:
1. A DC-DC converter configured to output an output voltage obtained by converting an input voltage, comprising: an input terminal that has the input voltage applied thereto; an output terminal that outputs the output voltage; a ground terminal; a first switching device electrically connected in series between the input terminal and a first node; a second switching device electrically connected in series to the first switching device at the first node and between the first node and the ground terminal; a first drive circuit that turns on and off the first switching device; a first bootstrap capacitor circuit including a first bootstrap capacitor electrically connected to the first drive circuit; a second drive circuit that turns on and off the second switching device; a third switching device electrically connected in series between the output terminal and a second node; a fourth switching device electrically connected in series to the third switching device at the second node and between the second node and the ground terminal; a third drive circuit that turns on and off the third switching device; a second bootstrap capacitor circuit including a second bootstrap capacitor electrically connected to the third drive circuit; a fourth drive circuit that turns on and off the fourth switching device; an inductor electrically connected in series between the first node and the second node; and a control circuit electrically connected to the first drive circuit, the second drive circuit, the third drive circuit, and the fourth drive circuit, wherein, in a case that the output voltage is lower than the input voltage, the control circuit is operable to control the first drive circuit, the second drive circuit, the third drive circuit, and the fourth drive circuit as to: wherein, in a case that the output voltage is higher than the input voltage, the control circuit is operable to control the first drive circuit, the second drive circuit, the third drive circuit, and the fourth drive circuit as to: