公开(公告)号：US10699175B2

公开(公告)日：2020-06-30

申请号：US16367189

申请日：2019-03-27

申请人： Integrated Device Technology, Inc.

发明人： Rui Liu ,  Tao Qi ,  Lijie Zhao ,  Gustavo James Mehas ,  Tae Kwang Park ,  Zhitong Guo ,  Siqiang Fan

IPC分类号： G06K7/08 ,  G06K19/06 ,  G06K7/10 ,  G06K19/077 ,  G06Q20/32

摘要： According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.

公开(公告)号：US11211829B2

公开(公告)日：2021-12-28

申请号：US16371887

申请日：2019-04-01

申请人： Integrated Device Technology, Inc.

发明人： Jiangjian Huang ,  Feng Zhou ,  Zhitong Guo ,  Rui Liu

IPC分类号： H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H02J50/27 ,  H02J50/10 ,  H02J50/23

摘要： Embodiments described herein a method for controlling operating frequency for a wireless power charging system. Specifically, a transmitter coil at a wireless power transmitter is driven under an operating frequency and an input voltage. Deadtime information at the wireless power receiver is received, from a wireless power receiver having a receiver coil that receives wireless power from the transmitter coil. A microcontroller then determines, based on the received deadtime information or the operating frequency, whether the operating frequency deviates from a target operating frequency range. Based on the determination, one or both of the operating frequency or the input voltage are adjusted thereby causing the operating frequency to fall within the target operating frequency range.

公开(公告)号：US10804750B2

公开(公告)日：2020-10-13

申请号：US15998784

申请日：2018-08-16

申请人： Integrated Device Technology, Inc.

发明人： Rui Liu ,  Zhitong Guo ,  Haiwen Jiang

IPC分类号： H02J50/60 ,  H02J50/12 ,  G01V3/38 ,  G01R27/26 ,  H02J7/02 ,  G01V3/10

摘要： A method of measuring a Q-factor in a wireless power transmitter includes charging a capacitor in a LC tank circuit that includes a transmission coil to a voltage; starting a Q-factor determining by coupling the LC tank circuit to ground to form a free-oscillating circuit; monitoring the voltage across the capacitor as a function of time as the LC tank circuit oscillates; and determining the resonant frequency and the Q-factor from monitoring the voltage.

公开(公告)号：US10963764B2

公开(公告)日：2021-03-30

申请号：US16510498

申请日：2019-07-12

申请人： Integrated Device Technology, Inc.

发明人： Rui Liu ,  Tao Qi ,  Lijie Zhao ,  Gustavo James Mehas ,  Tae Kwang Park ,  Zhitong Guo ,  Siqiang Fan

IPC分类号： G06K7/08 ,  G06K19/06 ,  G06K7/10 ,  G06K19/077 ,  G06Q20/32

摘要： According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.

公开(公告)号：US10554061B2

公开(公告)日：2020-02-04

申请号：US15828158

申请日：2017-11-30

申请人： Integrated Device Technology, Inc.

发明人： Rui Liu ,  Gustavo James Mehas ,  Lijie Zhao ,  Tae Kwang Park ,  Zhitong Guo

IPC分类号： H02J7/00

摘要： A charging system that includes a switching control circuit coupled to four series-coupled MOSFET transistors; a flying capacitor coupled across two of the four series-coupled MOSFET transistors; and node between the two of the four series coupled transistors that couples to an output inductor to form a buck regulator is presented. Embodiments of the charging system can have increased efficiency, can reduce the size and inductance of the output inductor, and can be produced with a low voltage process.

公开(公告)号：US10360485B2

公开(公告)日：2019-07-23

申请号：US15688682

申请日：2017-08-28

申请人： Integrated Device Technology, Inc.

发明人： Rui Liu ,  Tao Qi ,  Lijie Zhao ,  Gustavo James Mehas ,  Tae Kwang Park ,  Zhitong Guo ,  Siqiang Fan

IPC分类号： G06K7/08 ,  G06K19/06 ,  G06K7/10 ,  G06K19/077 ,  G06Q20/32

摘要： According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.