公开(公告)号：US20240364231A1

公开(公告)日：2024-10-31

申请号：US18682514

申请日：2022-10-13

Applicant: Hitachi Power Semiconductor Device, Ltd.

Inventor： Yoshihiro MIWA ,  Hiroyuki SHOJI ,  Junichi SAKANO ,  Tomoyuki UTSUMI ,  Takahiro HIGUCHI

IPC: H02M7/219 ,  H02M1/00 ,  H02M1/08

CPC classification number: H02M7/219 ,  H02M1/08 ,  H02M1/0048

Abstract: A first MOSFET, a second MOSFET, a first control circuit, and a second control circuit are provided; the second MOSFET is in a non-rectification period when the first MOSFET is in a rectification period; the first MOSFET is in a non-rectification period when the second MOSFET is in a rectification period; the first control circuit outputs a voltage generated on the basis of a first input voltage as a first output voltage between the gate and the source of the first MOSFET in at least a portion of a period in which a voltage between the drain and the source of the second MOSFET is inputted as the first input voltage and a negative voltage is applied between the drain and the source of the first MOSFET; the second control circuit outputs a voltage generated on the basis of a second input voltage as a second output voltage between the gate and the source of the second MOSFET in at least a portion of a period in which a voltage between the drain and the source of the first MOSFET is inputted as the second input voltage and a negative voltage is applied between the drain and the source of the second MOSFET.

公开(公告)号：US20240364229A1

公开(公告)日：2024-10-31

申请号：US18580783

申请日：2022-05-10

Applicant: Hitachi Power Semiconductor Device, Ltd.

Inventor： Yoshihiro MIWA ,  Hiroyuki SHOJI ,  Junichi SAKANO ,  Tomoyuki UTSUMI ,  Takahiro HIGUCHI

IPC: H02M7/217 ,  H02M1/08 ,  H02M3/335

CPC classification number: H02M7/217 ,  H02M1/08 ,  H02M3/33573

Abstract: An effective technique is applied to a rectifier circuit that performs synchronous rectification using a switching element. The rectifier circuit performs the synchronous rectification using a MOSFET, for example, as the switching element. By using the rectifier circuit, a capacitance of a capacitor for supplying power to a drive circuit can be reduced. As a result, downsizing and cost reduction of the rectifier circuit and the power supply using the rectifier circuit can be achieved.