公开(公告)号：US12294304B2

公开(公告)日：2025-05-06

申请号：US18146493

申请日：2022-12-27

Applicant: Richtek Technology Corporation

Inventor： Shei-Chie Yang ,  Yuan-Yen Mai ,  Pao-Hsun Yu ,  Cheng-Hung Hsu

IPC: H02M3/158 ,  H02M1/00

Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit; a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between an input voltage of an input power and an output voltage of an output power and according to whether an inductor current flowing through an inductor reaches an output current of the output power; and a bypass switch circuit, wherein when the conversion voltage difference is below a reference voltage and when the inductor current flowing through the inductor reaches the output current, the bypass control signal controls the bypass switch circuit to electrically connect the input power with the output power, so that the buck-boost switching regulator operates in a bypass mode.

公开(公告)号：US20240072667A1

公开(公告)日：2024-02-29

申请号：US18358037

申请日：2023-07-25

Applicant: Richtek Technology Corporation

Inventor： Pao-Hsun Yu ,  Shei-Chie Yang ,  Yuan-Yen Mai ,  Cheng-Hung Hsu

IPC: H02M3/158 ,  H02M1/088 ,  H02M3/07

CPC classification number: H02M3/158 ,  H02M1/088 ,  H02M3/07

Abstract: A switching regulator includes a boost power stage circuit and a control circuit. The boost power stage circuit includes: at least one power switch configured to switch a terminal of an inductor according to an operation signal during a normal operation period, such that the terminal of the inductor is switched between an output voltage and ground level; and a power line switch connected in series to the inductor between the input voltage and the output voltage. The power line switch is turned OFF when the output voltage is short to ground level, to prevent a short current from flowing from input voltage to ground level. The control circuit generates the operation signal according to the output voltage and determines whether the power line switch is P-type or N-type MOS device, so as to turn OFF the power line switch when the output voltage is short to ground level.

公开(公告)号：US11736013B2

公开(公告)日：2023-08-22

申请号：US17566678

申请日：2021-12-30

Applicant: Richtek Technology Corporation

Inventor： Shei-Chie Yang ,  Jian-Yu Tu ,  Yuan-Yen Mai ,  Pao-Hsun Yu

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M1/009

Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit which switch a first terminal and a second terminal of an inductor for buck-boost conversion; at least one low dropout regulator correspondingly coupled to at least one output high side switch in the output switch unit to correspondingly convert at least one low dropout voltage into at least one output voltage; and a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between the input voltage and the corresponding low dropout voltage; wherein when the corresponding conversion voltage difference is lower than a reference voltage, the bypass control signal controls a corresponding bypass switch to electrically connect the input voltage with the corresponding low dropout node.

公开(公告)号：US20230216410A1

公开(公告)日：2023-07-06

申请号：US18146493

申请日：2022-12-27

Applicant: Richtek Technology Corporation

Inventor： Shei-Chie Yang ,  Yuan-Yen Mai ,  Pao-Hsun Yu ,  Cheng-Hung Hsu

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M1/0054

Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit; a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between an input voltage of an input power and an output voltage of an output power and according to whether an inductor current flowing through an inductor reaches an output current of the output power; and a bypass switch circuit, wherein when the conversion voltage difference is below a reference voltage and when the inductor current flowing through the inductor reaches the output current, the bypass control signal controls the bypass switch circuit to electrically connect the input power with the output power, so that the buck-boost switching regulator operates in a bypass mode.

公开(公告)号：US20220224233A1

公开(公告)日：2022-07-14

申请号：US17566678

申请日：2021-12-30

Applicant: Richtek Technology Corporation

Inventor： Shei-Chie Yang ,  Jian-Yu Tu ,  Yuan-Yen Mai ,  Pao-Hsun Yu

IPC: H02M3/158 ,  H02M1/00

Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit which switch a first terminal and a second terminal of an inductor for buck-boost conversion; at least one low dropout regulator correspondingly coupled to at least one output high side switch in the output switch unit to correspondingly convert at least one low dropout voltage into at least one output voltage; and a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between the input voltage and the corresponding low dropout voltage; wherein when the corresponding conversion voltage difference is lower than a reference voltage, the bypass control signal controls a corresponding bypass switch to electrically connect the input voltage with the corresponding low dropout node.