公开(公告)号：US20230198397A1

公开(公告)日：2023-06-22

申请号：US17925529

申请日：2021-05-28

Applicant: Rohm Co., Ltd.

Inventor： Shingo Hashiguchi ,  Isao Takobe ,  Kosuke Sato ,  Yuhei Yamaguchi

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/0025 ,  H02M1/0009 ,  H02M1/0022

Abstract: A switching power supply device includes first and second switches connected in series between an application terminal for an input voltage and an application terminal for a voltage lower than the input voltage, and a controller configured to turn on and off the first and second switches. The controller has a first state where it keeps the first switch on and the second switch off, followed by a second state where it keeps the first switch off and the second switch on, followed by a third state where it keeps the first and second switches off, followed by a fourth state where it keeps the voltage at the connection node between the first and second switches lower than in the third state. The controller repeats the first, second, third, and fourth states at a fixed cycle.

公开(公告)号：US12040709B2

公开(公告)日：2024-07-16

申请号：US17615931

申请日：2020-06-12

Applicant: ROHM CO., LTD.

Inventor： Kosuke Sato ,  Tetsuo Tateishi ,  Shingo Hashiguchi ,  Isao Takobe ,  Yuhei Yamaguchi

IPC: H02M3/158 ,  B60R16/033 ,  H02M1/088 ,  H02M1/32 ,  H02M1/44

CPC classification number: H02M3/158 ,  B60R16/033 ,  H02M1/088 ,  H02M1/32 ,  H02M1/44

Abstract: A switching power supply device includes a first switch with a first terminal connectable to an application terminal for the input voltage and a second terminal connectable to the first terminal of an inductor; a second switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to an application terminal for a voltage lower than the input voltage; a third switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to the second terminal of the inductor; a detector; and a controller. The controller produces, after occurrence or a sign of occurrence of an overshoot in the output voltage is detected by the detector until settlement of the overshoot in the output voltage, a control state in which to keep the first and second switches off and the third switch on.

公开(公告)号：US20220321007A1

公开(公告)日：2022-10-06

申请号：US17615931

申请日：2020-06-12

Applicant: ROHM CO., LTD.

Inventor： Kosuke Sato ,  Tetsuo Tateishi ,  Shingo Hashiguchi ,  Isao Takobe ,  Yuhei Yamaguchi

IPC: H02M3/158 ,  H02M1/088 ,  H02M1/32 ,  B60R16/033

Abstract: A switching power supply device includes a first switch with a first terminal connectable to an application terminal for the input voltage and a second terminal connectable to the first terminal of an inductor; a second switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to an application terminal for a voltage lower than the input voltage; a third switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to the second terminal of the inductor; a detector; and a controller. The controller produces, after occurrence or a sign of occurrence of an overshoot in the output voltage is detected by the detector until settlement of the overshoot in the output voltage, a control state in which to keep the first and second switches off and the third switch on.