DOUBLE STEP-DOWN DC/DC CONVERTER AND DRIVING METHOD THEREOF

摘要

The present invention relates to a dual step-down type DC/DC converter that performs voltage conversion between an input terminal including an input power source based on a plurality of operation modes, and an output terminal including a parallel circuit of an output capacitor and an output resistance. The dual step-down type DC/DC converter includes: a first switch having a source terminal connected to a negative terminal of the input power source and a drain terminal connected to a lower side of the output terminal; a conversion circuit including a first leg and a second leg connected in parallel, in which an upper contact of the first leg and the second leg is connected to a positive terminal of the input power source, a lower contact of the first leg and the second leg is connected to a drain terminal of the first switch, a first capacitor and a third switch are provided on the first leg, a second switch and a fourth switch are provided on the second leg, a first inductor is provided on a first input line connecting a first point between the first capacitor and the third switch and an upper side of the output terminal, and a second inductor is provided on a second input line connecting a second point between the second switch and the fourth switch and an upper side of the output terminal; and a second capacitor connected to the first point and a negative terminal of the input power source.;COPYRIGHT KIPO 2018