公开(公告)号：US20220416652A1

公开(公告)日：2022-12-29

申请号：US17851015

申请日：2022-06-27

Applicant: Richtek Technology Corporation

Inventor： Chen-Pin Huang ,  Chia-Chun Li ,  Chen-Lin Hsu ,  Hung-Yu Cheng ,  Wan-Hsuan Yang

IPC: H02M1/44 ,  H02M1/34 ,  H02M3/158

Abstract: A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise canceling signal, wherein the noise canceling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.

公开(公告)号：US12034367B2

公开(公告)日：2024-07-09

申请号：US17851015

申请日：2022-06-27

Applicant: Richtek Technology Corporation

Inventor： Chen-Pin Huang ,  Chia-Chun Li ,  Chen-Lin Hsu ,  Hung-Yu Cheng ,  Wan-Hsuan Yang

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/34 ,  H02M1/44

CPC classification number: H02M1/44 ,  H02M1/0009 ,  H02M1/34 ,  H02M3/158

Abstract: A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise canceling signal, wherein the noise canceling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.

公开(公告)号：US12249910B1

公开(公告)日：2025-03-11

申请号：US18736856

申请日：2024-06-07

Applicant: Richtek Technology Corporation

Inventor： Chen-Pin Huang ,  Chia-Chun Li ,  Chen-Lin Hsu ,  Hung-Yu Cheng ,  Wan-Hsuan Yang

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/34 ,  H02M1/44

Abstract: A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise cancelling signal, wherein the noise cancelling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.