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：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.