公开(公告)号：US09705401B2

公开(公告)日：2017-07-11

申请号：US14742002

申请日：2015-06-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Min-Soo Cho ,  Jae-Yeol Han ,  Dong-Jin Keum ,  Il-Young Sohn ,  Ryotaro Kudo

IPC: H02M3/158 ,  H02M3/156

CPC classification number: H02M3/1582 ,  H02M3/1563

Abstract: A buck-boost converter includes: a converting circuit; a ripple injector; a hysteresis comparator; and a switching controller. The converting circuit is configured to generate an output voltage by adjusting an input voltage in a buck mode, a boost mode, and a buck-boost mode. The ripple injector is configured to generate a ripple based on switching signals corresponding to switching operations of the converting circuit. The hysteresis comparator outputs at least one switching control signal by comparing an output control voltage with a feedback voltage generated by adding the ripple to a divided voltage generated by performing a voltage division on the output voltage. The switching controller is configured to change a current flow path of the converting circuit based on the at least one switching control signal.