公开(公告)号：US11949229B2

公开(公告)日：2024-04-02

申请号：US16894346

申请日：2020-06-05

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo Mehas ,  Nicholaus Smith ,  Tao Qi ,  Jiangjian Huang

IPC: H02H9/04 ,  H02J50/10

CPC classification number: H02H9/04 ,  H02J50/10

Abstract: A wireless transmitter coordinates changes in the transmitter's input or output voltages with changes in the transmitter's operating frequency to counteract the transmitter's output power changes while changing the voltages. When the voltages are being increased, the output frequency is moved away from the resonant frequency. Consequently, the output power increase due to the increased voltages is restrained by the frequency change. Before or after the voltage increase, increased output power can be obtained by changing the output frequency while the input and output voltages are held constant or near constant. Some embodiments follow similar procedures when reducing the transmitter's input or output voltages. Calibration is performed before power transfer to determine suitable voltage and frequency profiles for voltage change operations. Other features are also provided.

公开(公告)号：US11985014B2

公开(公告)日：2024-05-14

申请号：US17831959

申请日：2022-06-03

Applicant: Renesas Electronics America Inc.

Inventor： Damla Solmaz Acar ,  Pooja Agrawal ,  Jure Menart ,  Tao Qi ,  Mihail Jefremow ,  Gustavo James Mehas

IPC: H04L27/06 ,  H02J50/10 ,  H02J50/80

CPC classification number: H04L27/06 ,  H02J50/10 ,  H02J50/80

Abstract: In an embodiment, a semiconductor device is disclosed that includes at least one processing device and firmware including a dynamic demodulation engine. The dynamic demodulation engine, when executed by the at least one processing device, is configured to obtain a digital signal waveform, dynamically select a bit detection method based at least in part on a characteristic of the digital signal waveform, perform demodulation of the digital signal waveform using the selected bit detection method and generate decoded packets based at least in part on the demodulation.

公开(公告)号：US20240429754A1

公开(公告)日：2024-12-26

申请号：US18821148

申请日：2024-08-30

Applicant: Renesas Electronics America Inc.

Inventor： Chan Young Jeong ,  Tao Qi ,  Young Chul Ryu ,  Kwangmuk Choi ,  Pooja Agrawal ,  Krishal Jaswantsinh Solanki ,  Adnan Dzebic

IPC: H02J50/60 ,  H02J50/10 ,  H02J50/80

Abstract: Systems, apparatuses, and methods for detecting a foreign object on a wireless power charging region are described. A circuit can detect an object inductively coupled to a wireless power transmitter. The circuit can further measure an input parameter prior to a power transfer stage, the input parameter can be one of an input current and an input power. The circuit can further compare the measured input parameter with a predetermined value. The circuit can further determine whether the object is a foreign object or the wireless power receiver based on a result of the comparison between the measured input parameter with the predetermined value.

公开(公告)号：US20210143688A1

公开(公告)日：2021-05-13

申请号：US17073699

申请日：2020-10-19

Applicant: Renesas Electronics America Inc.

Inventor： Pooja Agrawal ,  Adnan Dzebic ,  Tao Qi ,  Steve Jaycox ,  Chan Young Jeong

IPC: H02J50/80 ,  H02J50/10 ,  H02J7/00

Abstract: A method of over-current protection in a wireless power receiver operating in a high-power mode includes digitally receiving an output current signal, generating an OC INT signal if the output current signal is greater than a current limit value, and if the OC INT signal is generated, transmitting Count A number of End Power Transfer (EPT) packets. If wireless power transmission has not stopped, transmitting Count C number of Control Error Packets (CEPs) with Value B. If wireless power transmission has not reduced such that the output current IL is below the current limit value, then enabling an LDO current limit circuit in a power block of the wireless power receiver. In a low-power mode, the receiver enables a hardware over-current circuit that generates an OC INT signal when the output current exceeds a current limit.

公开(公告)号：US11728690B2

公开(公告)日：2023-08-15

申请号：US16915940

申请日：2020-06-29

Applicant: Renesas Electronics America Inc.

Inventor： Nicholaus Smith ,  Gustavo Mehas ,  Tao Qi

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/90 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/12 ,  H02J50/80 ,  H02J50/90

Abstract: A wireless power transmitter pulses the transmit power level unresponsively to the wireless power receiver's power requests in order to perform foreign object detection (FOD). The FOD is performed by the transmitter analyzing the receiver's responses to the pulsed power. Some embodiments avoid mistaking FOD for coil misalignment. Other features are also provided.

公开(公告)号：US20230146600A1

公开(公告)日：2023-05-11

申请号：US17883948

申请日：2022-08-09

Applicant: Renesas Electronics America Inc.

Inventor： Chan Young Jeong ,  Tao Qi ,  Young Chul Ryu ,  Kwangmuk Choi ,  Pooja Agrawal ,  Krishal Jaswantsinh Solanki ,  Adnan Dzebic

IPC: H02J50/60 ,  H02J50/10

CPC classification number: H02J50/60 ,  H02J50/10

Abstract: Systems, apparatuses, and methods for detecting a foreign object on a wireless power charging region are described. A circuit can detect an object inductively coupled to a wireless power transmitter. The circuit can further measure an input parameter prior to a power transfer stage, the input parameter can be one of an input current and an input power. The circuit can further compare the measured input parameter with a predetermined value. The circuit can further determine whether the object is a foreign object or the wireless power receiver based on a result of the comparison between the measured input parameter with the predetermined value.

公开(公告)号：US12100972B2

公开(公告)日：2024-09-24

申请号：US17883948

申请日：2022-08-09

Applicant: Renesas Electronics America Inc.

Inventor： Chan Young Jeong ,  Tao Qi ,  Young Chul Ryu ,  Kwangmuk Choi ,  Pooja Agrawal ,  Krishal Jaswantsinh Solanki ,  Adnan Dzebic

IPC: H02J50/60 ,  H02J50/10 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/10 ,  H02J50/80

Abstract: Systems, apparatuses, and methods for detecting a foreign object on a wireless power charging region are described. A circuit can detect an object inductively coupled to a wireless power transmitter. The circuit can further measure an input parameter prior to a power transfer stage, the input parameter can be one of an input current and an input power. The circuit can further compare the measured input parameter with a predetermined value. The circuit can further determine whether the object is a foreign object or the wireless power receiver based on a result of the comparison between the measured input parameter with the predetermined value.

公开(公告)号：US20230396472A1

公开(公告)日：2023-12-07

申请号：US17831959

申请日：2022-06-03

Applicant: Renesas Electronics America Inc.

Inventor： Damla Solmaz Acar ,  Pooja Agrawal ,  Jure Menart ,  Tao Qi ,  Mihail Jefremow ,  Gustavo James Mehas

IPC: H04L27/06 ,  H02J50/10 ,  H02J50/80

CPC classification number: H04L27/06 ,  H02J50/10 ,  H02J50/80

Abstract: In an embodiment, a semiconductor device is disclosed that includes at least one processing device and firmware including a dynamic demodulation engine. The dynamic demodulation engine, when executed by the at least one processing device, is configured to obtain a digital signal waveform, dynamically select a bit detection method based at least in part on a characteristic of the digital signal waveform, perform demodulation of the digital signal waveform using the selected bit detection method and generate decoded packets based at least in part on the demodulation.

公开(公告)号：US20210408836A1

公开(公告)日：2021-12-30

申请号：US16915940

申请日：2020-06-29

Applicant: Renesas Electronics America Inc.

Inventor： Nicholaus SMITH ,  Gustavo Mehas ,  Tao Qi

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/90 ,  H02J50/80

Abstract: A wireless power transmitter pulses the transmit power level unresponsively to the wireless power receiver's power requests in order to perform foreign object detection (FOD). The FOD is performed by the transmitter analyzing the receiver's responses to the pulsed power. Some embodiments avoid mistaking FOD for coil misalignment. Other features are also provided.

公开(公告)号：US20210384722A1

公开(公告)日：2021-12-09

申请号：US16894346

申请日：2020-06-05

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo Mehas ,  Nicholaus Smith ,  Tao Qi ,  Jiangjian Huang

IPC: H02H9/04 ,  H02J50/10

Abstract: A wireless transmitter coordinates changes in the transmitter's input or output voltages with changes in the transmitter's operating frequency to counteract the transmitter's output power changes while changing the voltages. When the voltages are being increased, the output frequency is moved away from the resonant frequency. Consequently, the output power increase due to the increased voltages is restrained by the frequency change. Before or after the voltage increase, increased output power can be obtained by changing the output frequency while the input and output voltages are held constant or near constant. Some embodiments follow similar procedures when reducing the transmitter's input or output voltages. Calibration is performed before power transfer to determine suitable voltage and frequency profiles for voltage change operations. Other features are also provided.