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.

公开(公告)号：US09667239B2

公开(公告)日：2017-05-30

申请号：US15171680

申请日：2016-06-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Takahiro Nomiyama ,  Dong-Jin Keum ,  Hoang Quoc Duong ,  Jae-Yeol Han

IPC: G05F1/10 ,  G06F3/02 ,  H03K17/082 ,  H03K5/24 ,  H03K3/037 ,  H03K19/00 ,  H03K19/20 ,  G05F1/575

CPC classification number: H03K17/0822 ,  G05F1/575 ,  G11C5/147 ,  H03K3/0377 ,  H03K5/24 ,  H03K19/0013 ,  H03K19/20 ,  H03K2217/0027

Abstract: A voltage regulator includes a high duty cycle detector, a feedback controller, a hysteretic comparator, and first and second drivers. The high duty cycle detector generates a high duty cycle signal based on a power supply voltage and a reference voltage. The feedback controller generates first and second feedback voltages based on the reference voltage, the high duty cycle signal and an output voltage of the voltage regulator. The hysteretic comparator compares the reference voltage and the first feedback voltage to generate a control signal. When the first feedback voltage is activated, the first driver drives an output node that provides the output voltage based on the control signal and the high duty cycle signal. When the second feedback voltage is activated, the second driver generates a third voltage proportional to the reference voltage based on the power supply voltage and the second feedback voltage, and drives the output node with the third voltage.