公开(公告)号：US11909315B2

公开(公告)日：2024-02-20

申请号：US17567129

申请日：2022-01-02

Applicant: Richtek Technology Corporation

Inventor： Yung-Chun Chuang ,  Huan-Chien Yang

IPC: H02M3/158 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/0025 ,  H02M3/156 ,  H02M3/1566

Abstract: A switching regulator includes a power stage circuit and a controller circuit. The controller circuit includes a first amplification circuit, a second amplification circuit, a ramp signal generation circuit, and a comparator. The first amplification circuit generates an amplification signal according to a difference between a low-pass filtered signal and a feedback signal. The second amplification circuit generates an adjustment signal according to a difference between the feedback signal and a fast response signal. The comparator generates a pulse width modulation signal according to a difference between the amplification signal and a ramp signal to generate a switch control signal. The adjustment signal adaptively adjusts the amplification signal or the ramp signal. The low-pass filtered signal is related to a signal generated by filtering out higher frequency part of the reference signal, and the reference signal is related to a dynamic change of a target level of the output voltage.

公开(公告)号：US10811962B2

公开(公告)日：2020-10-20

申请号：US16680599

申请日：2019-11-12

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

IPC: H02M3/158 ,  H02M3/07 ,  H02M1/00

Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.

公开(公告)号：US20210351719A1

公开(公告)日：2021-11-11

申请号：US17227276

申请日：2021-04-10

Applicant: Richtek Technology Corporation

Inventor： Yung-Chun Chuang ,  Huan-Chien Yang

IPC: H02M7/5387 ,  H02M1/00

Abstract: A switching power conversion circuit includes a conversion capacitor, a capacitive power conversion circuit, an inductor, an inductive power conversion circuit and a switching control circuit. The capacitive power conversion circuit switches the conversion capacitor periodically according to a switching control signal generated by the switching control circuit, to generate a first intermediate voltage and a first proportional voltage in a promptly rising mode and to generate a second intermediate voltage and a second proportional voltage in a promptly falling mode. In the promptly rising mode, a rising slope of an inductor current is determined by a difference between a high level of the first proportional voltage and an output voltage. In the promptly falling mode, a falling slope of the inductor current is determined by a difference between a low level of the second proportional voltage and the output voltage.

公开(公告)号：US20210226530A1

公开(公告)日：2021-07-22

申请号：US17022167

申请日：2020-09-16

Applicant: Richtek Technology Corporation

Inventor： Shui-Mu Lin ,  Tsung-Wei Huang ,  Huan-Chien Yang ,  Yung-Chun Chuang

IPC: H02M3/07

Abstract: A switching power conversion circuit includes a conversion capacitor, a capacitive power conversion circuit, an inductor, an inductive power conversion circuit and a switching control circuit. The capacitive power conversion circuit includes plural switching devices for generating an intermediate voltage which is in a predetermined proportional relationship to the input voltage. The inductive power conversion circuit includes plural switching devices for converting the intermediate voltage to an output voltage. The plural switching devices of the capacitive power conversion circuit and the inductive power conversion circuit switch the conversion capacitor and the inductor periodically according to the duty ratio of the switching control signal generated by the switching control circuit. The capacitive power conversion circuit and the inductive power conversion circuit share one of the plural switching devices.

公开(公告)号：US11381176B2

公开(公告)日：2022-07-05

申请号：US17227276

申请日：2021-04-10

Applicant: Richtek Technology Corporation

Inventor： Yung-Chun Chuang ,  Huan-Chien Yang

IPC: H02M7/5387 ,  H02M1/00

Abstract: A switching power conversion circuit includes a conversion capacitor, a capacitive power conversion circuit, an inductor, an inductive power conversion circuit and a switching control circuit. The capacitive power conversion circuit switches the conversion capacitor periodically according to a switching control signal generated by the switching control circuit, to generate a first intermediate voltage and a first proportional voltage in a promptly rising mode and to generate a second intermediate voltage and a second proportional voltage in a promptly falling mode. In the promptly rising mode, a rising slope of an inductor current is determined by a difference between a high level of the first proportional voltage and an output voltage. In the promptly falling mode, a falling slope of the inductor current is determined by a difference between a low level of the second proportional voltage and the output voltage.

公开(公告)号：US20200161967A1

公开(公告)日：2020-05-21

申请号：US16680599

申请日：2019-11-12

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

IPC: H02M3/07 ,  H02M1/14

Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.

公开(公告)号：US20200161959A1

公开(公告)日：2020-05-21

申请号：US16653940

申请日：2019-10-15

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

IPC: H02M1/08 ,  H02M3/07

Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.

公开(公告)号：US20220231604A1

公开(公告)日：2022-07-21

申请号：US17567129

申请日：2022-01-02

Applicant: Richtek Technology Corporation

Inventor： Yung-Chun Chuang ,  Huan-Chien Yang

IPC: H02M3/158 ,  H02M1/08

Abstract: A switching regulator includes a power stage circuit and a controller circuit. The controller circuit includes a first amplification circuit, a second amplification circuit, a ramp signal generation circuit, and a comparator. The first amplification circuit generates an amplification signal according to a difference between a low-pass filtered signal and a feedback signal. The second amplification circuit generates an adjustment signal according to a difference between the feedback signal and a fast response signal. The comparator generates a pulse width modulation signal according to a difference between the amplification signal and a ramp signal to generate a switch control signal. The adjustment signal adaptively adjusts the amplification signal or the ramp signal. The low-pass filtered signal is related to a signal generated by filtering out higher frequency part of the reference signal, and the reference signal is related to a dynamic change of a target level of the output voltage.

公开(公告)号：US11329553B2

公开(公告)日：2022-05-10

申请号：US17022167

申请日：2020-09-16

Applicant: Richtek Technology Corporation

Inventor： Shui-Mu Lin ,  Tsung-Wei Huang ,  Huan-Chien Yang ,  Yung-Chun Chuang

IPC: H02M3/07

Abstract: A switching power conversion circuit includes a conversion capacitor, a capacitive power conversion circuit, an inductor, an inductive power conversion circuit and a switching control circuit. The capacitive power conversion circuit includes plural switching devices for generating an intermediate voltage which is in a predetermined proportional relationship to the input voltage. The inductive power conversion circuit includes plural switching devices for converting the intermediate voltage to an output voltage. The plural switching devices of the capacitive power conversion circuit and the inductive power conversion circuit switch the conversion capacitor and the inductor periodically according to the duty ratio of the switching control signal generated by the switching control circuit. The capacitive power conversion circuit and the inductive power conversion circuit share one of the plural switching devices.

公开(公告)号：US10944321B2

公开(公告)日：2021-03-09

申请号：US16653940

申请日：2019-10-15

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chun Chuang ,  Tsung-Wei Huang

IPC: H02M3/158 ,  H02M3/07

Abstract: A multi-level switching power converter includes a multi-level power stage circuit which converts an input power to an output power. The power stage circuit includes an inductor, a conversion capacitor and plural power switches. The controller circuit controls the multi-level power stage circuit and includes: a feedback pulse generator circuit which generates a trigger pulse; a first timer circuit and a second timer circuit which determine a first time period and a second time period respectively according to the trigger pulse; and an adjusting circuit which adjusts the first time period according to a difference between the voltage across the conversion capacitor and a reference voltage such that an average of the voltage across the conversion capacitor is substantially equal to a level of the reference voltage.