公开(公告)号：US10199881B2

公开(公告)日：2019-02-05

申请号：US15244107

申请日：2016-08-23

Applicant: MediaTek Inc.

Inventor： Vladimir A. Muratov ,  Patrick Stanley Riehl ,  William Plumb

IPC: H02J50/12 ,  H02J50/60 ,  H02J7/02

Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.

公开(公告)号：US20170126074A1

公开(公告)日：2017-05-04

申请号：US15150807

申请日：2016-05-10

Applicant: MediaTek Inc.

Inventor： Vladimir A. Muratov

IPC: H02J50/80 ,  H02M1/08 ,  G01R19/00 ,  H02M3/158

CPC classification number: H02J50/80 ,  G01R19/0046 ,  H02M3/156 ,  H02M2001/0009

Abstract: Methods and apparatus for indirectly determining an input current or an output current of a DC/DC switching converter operating in a closed loop. A controller of the switching converter determines an efficiency of the switching converter based, at least in part, on an input voltage of the switching converter, an output voltage of the switching converter, and at least one switching timing parameter for controlling electronic switches in the switching converter. The input current or output current is indirectly determined based, at least in part, on the efficiency of the switching converter and a direct measurement of the input current or the output current, whichever one is not being indirectly determined, using a current sensor.

公开(公告)号：US20170018937A1

公开(公告)日：2017-01-19

申请号：US14990833

申请日：2016-01-08

Applicant: MediaTek Inc.

Inventor： Vladimir A. Muratov

IPC: H02J5/00

CPC classification number: H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02J50/40 ,  H02J50/80

Abstract: A wireless power transmitter includes a multi-mode drive circuit having a controllable resonant frequency. The multi-mode drive circuit is controlled to have a first resonant frequency to drive wireless power transmission at a first transmit frequency. The multi-mode drive circuit is also controlled to have a second resonant frequency higher than the first resonant frequency to drive wireless power transmission at a second transmit frequency higher than the first transmit frequency.

Abstract translation: 无线电力发射机包括具有可控谐振频率的多模驱动电路。 多模驱动电路被控制为具有第一谐振频率以以第一发射频率驱动无线功率传输。 多模驱动电路还被控制为具有高于第一谐振频率的第二谐振频率，以在高于第一发射频率的第二发射频率驱动无线功率传输。

公开(公告)号：US20170018936A1

公开(公告)日：2017-01-19

申请号：US14960541

申请日：2015-12-07

Applicant: MediaTek Inc.

Inventor： Vladimir A. Muratov ,  Yung-Chih Yen

IPC: H02J5/00

Abstract: A multi-mode wireless power transmitter includes a first drive circuit of a first type and a second drive circuit of a second type. The first drive circuit is configured to drive a first transmit coil at a first frequency. The second drive circuit is configured to drive a second transmit coil at a second frequency higher than the first frequency.

Abstract translation: 多模式无线电力发射机包括第一类型的第一驱动电路和第二类型的第二驱动电路。 第一驱动电路被配置为以第一频率驱动第一发射线圈。 第二驱动电路被配置为以高于第一频率的第二频率驱动第二发射线圈。