公开(公告)号：US20240072683A1

公开(公告)日：2024-02-29

申请号：US17896495

申请日：2022-08-26

Applicant: Renesas Electronics America Inc.

Inventor： Marco Sautto ,  Sercan Ipek ,  Turev Acar

IPC: H02M7/25 ,  H02J50/12 ,  H02M1/00 ,  H02M7/219

CPC classification number: H02M7/25 ,  H02J50/12 ,  H02M1/0009 ,  H02M7/219

Abstract: Systems and methods for wireless power transfer systems are described. A controller can be coupled to a power rectifier configured to rectify alternating current power into direct current power. The power rectifier can include a first high side transistor, a second high side transistor, a first low side transistor, and a second low side transistor. The controller can be configured to selectively switch on one or more of the first high side transistor, the second high side transistor, the first low side transistor, and the second low side transistor to operate a wireless power receiver under one of a full bridge rectifier mode and a voltage doubler mode.

公开(公告)号：US12206253B2

公开(公告)日：2025-01-21

申请号：US17896495

申请日：2022-08-26

Applicant: Renesas Electronics America Inc.

Inventor： Marco Sautto ,  Sercan Ipek ,  Turev Acar

IPC: H02J50/12 ,  H02M7/219 ,  H02M7/25

Abstract: Systems and methods for wireless power transfer systems are described. A controller can be coupled to a power rectifier configured to rectify alternating current power into direct current power. The power rectifier can include a first high side transistor, a second high side transistor, a first low side transistor, and a second low side transistor. The controller can be configured to selectively switch on one or more of the first high side transistor, the second high side transistor, the first low side transistor, and the second low side transistor to operate a wireless power receiver under one of a full bridge rectifier mode and a voltage doubler mode.

公开(公告)号：US11336202B1

公开(公告)日：2022-05-17

申请号：US17318515

申请日：2021-05-12

Applicant: Renesas Electronics America Inc.

Inventor： Marco Sautto ,  Sercan Ipek ,  Jiangjian Huang ,  Turev Acar

IPC: H02M7/217 ,  H02J50/10 ,  H02M1/08 ,  H03F3/45

Abstract: Methods and apparatuses for controlling a rectified voltage outputted by a rectifier circuit is described. In response to an occurrence of an overvoltage condition, an apparatus can regulate a gate-source voltage of a low-side switching element of the rectifier circuit to control the rectified voltage. The apparatus can include an operational amplifier that can compare a reference voltage and with a scaled voltage measured at a node between the low-side switching element and a high-side switching element of the rectifier circuit. The operational amplifier can output a voltage to regulate a gate-source voltage of a low-side switching element. The apparatus can further include a current sensor configured to sense current flowing through the low-side switching element. A power dissipation of the low-side switching element can be controlled based on the current being sensed by the current sensor.