公开(公告)号：US20180048240A1

公开(公告)日：2018-02-15

申请号：US15666951

申请日：2017-08-02

Applicant: TDK Corporation

Inventor： Ryosuke HAYASAKI ,  Toshiki MURAYAMA ,  Ichiro TAKAYAMA ,  Kazuki IWAYA

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/33584 ,  H02J2007/0059 ,  H02M3/33507 ,  H02M3/3376 ,  H02M2001/0003 ,  H02M2001/0032

Abstract: A switching power supply apparatus is provided which reduces the time of application of an input voltage to a choke to suppress a peak current flowing through switch elements when a primary or secondary voltage is 0 V (or a voltage near 0 V). A DAB converter or switching power supply apparatus performs phase control to change at least either a first conduction width or a second conduction width of pairs of diagonally-arranged switch elements, constituting a primary full bridge circuit. The first conduction width is a time width in which a pulse for driving the first switch element and a pulse for driving the fourth switch element overlap temporally. The second conduction width is a time width in which a pulse for driving the second switch element and a pulse for driving the third switch element overlap temporally.