公开(公告)号：US20240186891A1

公开(公告)日：2024-06-06

申请号：US18526274

申请日：2023-12-01

Applicant: ROHM CO., LTD.

Inventor： YOSHINORI SATO

IPC: H02M1/42 ,  H02M7/21

CPC classification number: H02M1/4258 ,  H02M7/21

Abstract: The present disclosure provides a control device for a power factor correction circuit. The power factor correction circuit is disposed in a power supply device configured to generate a direct current output voltage from an alternating current voltage applied to a pair of power supply terminals. The power factor correction circuit is disposed between a full-wave rectifier circuit configured to generate a full-wave rectified voltage by full-wave rectifying the AC voltage and an output wiring configured to apply the output voltage. The power factor correction circuit includes an inductor inserted between the full-wave rectifier circuit and the output wiring, and a switching element configured to switch between an on state and an off state to control a current flowing through the inductor.

公开(公告)号：US20240178831A1

公开(公告)日：2024-05-30

申请号：US18522897

申请日：2023-11-29

Applicant: NEXPERIA B.V.

Inventor： Yong Qu ,  Joel Turchi ,  Katarzyna Nowak ,  Ricardo Yandoc

IPC: H03K17/0812 ,  H02M1/08 ,  H02M1/42

CPC classification number: H03K17/08122 ,  H02M1/08 ,  H02M1/4208 ,  H03K2017/0806

Abstract: A cascode transistor circuit including a depletion mode semiconductor device, an enhancement mode transistor having a drain terminal connected to a source terminal of the depletion mode semiconductor device, and a gate driver coupled to a first node between the source of the depletion mode semiconductor device and the drain of the enhancement mode transistor. The gate driver is powered by the depletion mode semiconductor device.

公开(公告)号：US20240178741A1

公开(公告)日：2024-05-30

申请号：US18072065

申请日：2022-11-30

Applicant: Infineon Technologies Austria AG

Inventor： Manuel Escudero Rodriguez ,  Matteo-Alessandro Kutschak ,  Alessandro Pevere ,  David Meneses Herrera

IPC: H02M1/00 ,  H02M1/42 ,  H02M3/00

CPC classification number: H02M1/007 ,  H02M1/0009 ,  H02M1/0043 ,  H02M1/4233 ,  H02M3/01

Abstract: A power converter includes: a solid-state transformer having a DC input and isolated DC outputs; a half bridge converter stage for each isolated DC output of the solid-state transformer, wherein an input of each half bridge converter stage is connected to the corresponding isolated DC output and an output of the half bridge converter stages are electrically connected in a cascade configuration; an output inductor shared by the half bridge converter stages and configured to deliver an output current; and a controller configured to implement phase shift control of the half bridge converter stages relative to one another, based on the number of half bridge converter stages and an output voltage of the power converter being regulated, such that each half bridge converter stage processes the full output current but only a fraction of the output voltage. Methods of controlling the power converter are also described.

公开(公告)号：US20240178740A1

公开(公告)日：2024-05-30

申请号：US18300190

申请日：2023-04-13

Applicant: DELTA ELECTRONICS, INC.

Inventor： Shang-Kay YANG ,  Hsien-Kai WANG ,  Yen-Wei LIN

IPC: H02M1/00 ,  H02M1/08 ,  H02M1/42

CPC classification number: H02M1/0054 ,  H02M1/0035 ,  H02M1/08 ,  H02M1/4233

Abstract: A power converter with reduced power consumption receives an input voltage and provides an output voltage to supply power to a load. The power converter includes a power factor correction circuit, a driver circuit, and a controller. The power factor correction circuit includes at least one inductor and an output capacitor. When the controller determines that an effective value of an input current is correspondingly lower than a current lower limit, a specific time period starts based on the output voltage reaching a voltage lower limit, and the specific time period ends based on the output voltage reaching a voltage upper limit. In the specific time period, the controller enables the driver circuit based on the input current being correspondingly greater than a predetermined threshold so as to continuously transfer the energy stored in the at least one inductor to the output capacitor.

公开(公告)号：US11996789B2

公开(公告)日：2024-05-28

申请号：US17547463

申请日：2021-12-10

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Grover Victor Torrico-Bascopé

IPC: H02M7/81 ,  B60L53/20 ,  H02M1/42 ,  H02M1/44

CPC classification number: H02M7/81 ,  B60L53/20 ,  H02M1/42 ,  H02M1/44

Abstract: A power conversion apparatus employs multi-level techniques and wide band-gap semiconductor switching devices to achieve high efficiency in a converter system having high power density. The apparatus may be configured as a bi-directional conversion system capable of operating as both an inverter, configured to receive DC power and produce AC power, and as a rectifier configured to receive AC power and produce DC power. The apparatus is especially suitable for electric vehicle (EV) applications.

公开(公告)号：US11990828B2

公开(公告)日：2024-05-21

申请号：US17631688

申请日：2020-04-20

Applicant: SG MICRO CORP

Inventor： Jianchun Chen ,  Shoubao Yan ,  Xiang Yu

IPC: H02M3/156 ,  H02M1/00 ,  H02M1/08 ,  H02M1/42 ,  H02M3/157

CPC classification number: H02M1/0029 ,  H02M1/08 ,  H02M1/4225 ,  H02M3/156 ,  H02M3/157

Abstract: Disclosed is a switching power supply circuit and a control circuit and a control method thereof. The control circuit comprises a control unit and a driving unit. The control unit controls the driving unit to provide a driving signal with different driving strengths according to a comparison result between a switching voltage and a preset voltage, so as to adjust a speed of turning the power switch off. By controlling the driving strength of the driving signal, a rising rate of the switching voltage can be improved, a spike of the switching voltage can be reduced, various components in the circuit can be protected from being damaged by the spike, and service life and reliability of the circuit can be improved.

公开(公告)号：US20240163991A1

公开(公告)日：2024-05-16

申请号：US17985917

申请日：2022-11-14

Applicant: INVENT10 LIMITED

Inventor： Kam Wah SIU

IPC: H05B45/355 ,  H02M1/14 ,  H02M1/42 ,  H02M7/06

CPC classification number: H05B45/355 ,  H02M1/14 ,  H02M1/42 ,  H02M7/06

Abstract: Embodiments of the invention overcome prior approaches by creating a single-stage, high-power LED driver topology. In one aspect, the topology may be used and suitable for driving horticultural LED lights.

公开(公告)号：US20240162810A1

公开(公告)日：2024-05-16

申请号：US18282916

申请日：2022-03-03

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Sadanori SUZUKI

IPC: H02M1/42 ,  H02M1/15 ,  H02M1/44 ,  H02M7/217 ,  H02M7/25

CPC classification number: H02M1/4283 ,  H02M1/15 ,  H02M1/44 ,  H02M7/2176 ,  H02M7/25

Abstract: A power conversion device converts AC voltage into DC voltage. The power conversion device includes a transformer, a first capacitor, a primary circuit, a rectifying-smoothing circuit, and a controller. The primary circuit includes a bridge circuit having two arm switching elements, and is connected to a primary winding of the transformer via the first capacitor. The rectifying-smoothing circuit includes a secondary diode and an output capacitor. The primary circuit includes a buffer circuit having a buffer capacitor and a buffer switching element. The controller controls switching of switching elements.

公开(公告)号：US20240162809A1

公开(公告)日：2024-05-16

申请号：US18117477

申请日：2023-03-06

Applicant: LITE-ON TECHNOLOGY CORPORATION

Inventor： Yu-Cheng LIN ,  Te-Hung YU ,  Chia-Hui LIANG ,  Min-Hao HSU

IPC: H02M1/42

CPC classification number: H02M1/4208

Abstract: A power supply circuit is provided. The power factor correction (PFC) circuit is used to perform a power factor correction according to a first voltage to generate an intermediate voltage. The first storage capacitor is used to store a first electrical energy related to the intermediate voltage. The boost conversion circuit is connected to the PFC circuit and used to generate an output voltage according to the intermediate voltage. The boost conversion circuit includes a first post-stage inductor, a first post-stage diode and a first post-stage transistor. The second storage capacitor is used to store a second electrical energy related to the output voltage. The capacitance value of the second storage capacitor is less than the capacitance value of the first storage capacitor; the first electrical energy is completely or partially transferred as the second electrical energy.

公开(公告)号：US11984808B2

公开(公告)日：2024-05-14

申请号：US17440490

申请日：2020-03-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Longcheng Tan

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/42

CPC classification number: H02M3/1586 ,  H02M1/0009 ,  H02M1/4225

Abstract: A regulator for an interleaved power factor correction circuit to enhance current sharing performance includes adjuster circuitry that determines a duty cycle adjustment; judge circuitry that determines whether to activate the adjuster circuitry; distributor circuitry that determines tuned duty cycles based on input duty cycles and the duty cycle adjustment; and tuner circuitry that determines tuned average inductor currents in first and second phases of the interleaved power factor correction circuit based on the tuned duty cycles.