Patent ID: 9484818
Filing Date: 2016-11-01
CPC Classification: H02M

Claim Text:
1. A DC-DC converter configured to output an output voltage obtained by converting an input voltage, the converter comprising: an input terminal configured to receive the input voltage; an output terminal configured to output 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 with the first switching device at the first node and between the input terminal and the first node; a first drive circuit for turning on and off the first switching device; a first bootstrap capacitor circuit electrically connected to the first drive circuit, the first bootstrap capacitor circuit including a first bootstrap capacitor; a second drive circuit for turning 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 with the third switching device at the second node and between the second node and the ground terminal; a third drive circuit for turning on and off the third switching device; a second bootstrap capacitor circuit electrically connected to the third drive circuit, the second bootstrap capacitor circuit including a second bootstrap capacitor; a fourth drive circuit for turning 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 with 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 higher than the input voltage, the control circuit controls 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 lower than the input voltage, the control circuit controls the first drive circuit, the second drive circuit, the third drive circuit and the fourth drive circuit so as to: