公开(公告)号：US12095387B2

公开(公告)日：2024-09-17

申请号：US17896517

申请日：2022-08-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guolei Yu ,  Shuchao Song ,  Junliang Qin ,  Zhiqiang Xiang

IPC: H02M3/158 ,  H02M1/00 ,  H02M7/483 ,  H02M7/487

CPC classification number: H02M7/4837 ,  H02M1/0095 ,  H02M3/158 ,  H02M7/487

Abstract: A multi-level direct current converter includes a direct current conversion unit, a switching unit, a voltage management unit, and a controller. The direct current conversion unit includes a flying capacitor, a first power transistor, and a second power transistor. A first end of the first power transistor is connected to a voltage input end of the multi-level direct current converter, a second end of the first power transistor is connected to a first end of the second power transistor by using the flying capacitor, and a second end of the second power transistor is connected to a reference ground.

公开(公告)号：US20230061103A1

公开(公告)日：2023-03-02

申请号：US17896517

申请日：2022-08-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guolei Yu ,  Shuchao Song ,  Junliang Qin ,  Zhiqiang Xiang

IPC: H02M7/483 ,  H02M7/487 ,  H02M1/00 ,  H02M3/158

Abstract: A multi-level direct current converter includes a direct current conversion unit, a switching unit, a voltage management unit, and a controller. The direct current conversion unit includes a flying capacitor, a first power transistor, and a second power transistor. A first end of the first power transistor is connected to a voltage input end of the multi-level direct current converter, a second end of the first power transistor is connected to a first end of the second power transistor by using the flying capacitor, and a second end of the second power transistor is connected to a reference ground.

公开(公告)号：US11916482B2

公开(公告)日：2024-02-27

申请号：US17681452

申请日：2022-02-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guolei Yu ,  Guiping Zhang ,  Xuyang Wu

IPC: H02M3/158 ,  H02M1/32 ,  H02M1/36

CPC classification number: H02M3/158 ,  H02M1/32 ,  H02M1/36

Abstract: A DC/DC converter includes a soft start overshoot prevention mechanism. The DC/DC converter includes a DC/DC conversion circuit, an overshoot detection apparatus, a pulse width modulation generator, an error amplifier, and an integration circuit connected to an output port of the error amplifier. The integration circuit is configured to perform integration processing on a difference between a reference voltage and an output voltage of the DC/DC conversion circuit, and control an amplitude of an amplified voltage that is input by the error amplifier to the pulse width modulation generator. The overshoot detection apparatus obtains an operating status parameter of the DC/DC converter, and controls, when the operating status parameter of the DC/DC converter meets an operating status parameter requirement, the integration circuit to discharge.