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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
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.