公开(公告)号：US20240243660A1

公开(公告)日：2024-07-18

申请号：US18495775

申请日：2023-10-27

Applicant: Richtek Technology Corporation

Inventor： Jung-Sheng Chen ,  Chin-Chun Chuang ,  Che-Wei Chang ,  Shi-Xian Wang

IPC: H02M3/156 ,  H02M1/00

CPC classification number: H02M3/156 ,  H02M1/0032

Abstract: A switching converter having pulse skipping mode includes a power stage circuit, a feedback control circuit, an operating signal generator circuit and a pulse skipping circuit. The feedback control circuit generates an initial pulse width modulation (PWM) signal according the output power. The operating signal generator circuit masks a part of pulses of a clock signal according to a pulse width of a pulse skipping signal, so as to generate an adjusted PWM signal. The pulse skipping circuit adaptively generates a duty ratio signal according to an input voltage and an output voltage, so as to generate the pulse skipping reference signal related to a duty ratio of the initial PWM signal. The pulse skipping circuit compares an amplification signal with the pulse skipping reference signal to generate the pulse skipping signal. The power stage circuit converts the input power to the output power according to the adjusted PWM signal.

公开(公告)号：US20230223987A1

公开(公告)日：2023-07-13

申请号：US18050784

申请日：2022-10-28

Applicant: Richtek Technology Corporation

Inventor： Jung-Sheng Chen ,  Chin-Yen Lin ,  Ching-Yu Chen ,  Ting-Jung Lo ,  Hsing-Shen Huang

IPC: H04B1/717 ,  H02M1/44 ,  H02M1/00

CPC classification number: H04B1/7172 ,  H02M1/0009 ,  H02M1/0025 ,  H02M1/44 ,  H04B1/7174

Abstract: A spread spectrum switching converter converts an input power to an output power. The spread spectrum switching converter includes a pulse width modulation (PWM) circuit and a pulse omission control circuit. The PWM circuit generate an initial PWM signal according to a feedback signal related to the output power. The initial PWM signal controls at least one switch to switch an inductor to generate the output power. The pulse omission control circuit generates a pulse omission control signal to mask a portion of pulses of the initial PWM signal, to thereby generate an adjusted PWM signal. The pulse omission control circuit randomly adjusts the pulse width of the pulse omission control signal according to a random control signal, such that the adjusted PWM signal has a spread spectrum characteristic.

公开(公告)号：US12301280B2

公开(公告)日：2025-05-13

申请号：US18050784

申请日：2022-10-28

Applicant: Richtek Technology Corporation

Inventor： Jung-Sheng Chen ,  Chin-Yen Lin ,  Ching-Yu Chen ,  Ting-Jung Lo ,  Hsing-Shen Huang

IPC: H02M1/44 ,  H02M1/00 ,  H04B1/717

Abstract: A spread spectrum switching converter converts an input power to an output power. The spread spectrum switching converter includes a pulse width modulation (PWM) circuit and a pulse omission control circuit. The PWM circuit generate an initial PWM signal according to a feedback signal related to the output power. The initial PWM signal controls at least one switch to switch an inductor to generate the output power. The pulse omission control circuit generates a pulse omission control signal to mask a portion of pulses of the initial PWM signal, to thereby generate an adjusted PWM signal. The pulse omission control circuit randomly adjusts the pulse width of the pulse omission control signal according to a random control signal, such that the adjusted PWM signal has a spread spectrum characteristic.

公开(公告)号：US12267003B2

公开(公告)日：2025-04-01

申请号：US18145267

申请日：2022-12-22

Applicant: Richtek Technology Corporation

Inventor： Jung-Sheng Chen ,  Chih-Chun Chuang ,  Yong-Chin Lee

IPC: H02M1/32 ,  H02M1/08 ,  H02M3/158 ,  H03K3/037 ,  H03K5/24

Abstract: A power converter that properly copes with the wiring defects on a feedback path is shown. According to a control signal, a power driver couples an input voltage to an energy storage element to provide an output voltage that is down-converted from the input voltage. The output voltage is further converted into a feedback voltage by a feedback circuit, and is entered to an error amplifier with a reference voltage for generation of an amplified error. A control signal generator generates the control signal of the power driver according to the amplified error. The power converter specifically has a comparator, which is enabled in a soft-start stage till the output voltage reaches a stable status. The comparator compares the amplified error with a critical value. When the amplified error exceeds the critical value, the input voltage is disconnected from the energy storage element.