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公开(公告)号：US11791662B2
公开(公告)日：2023-10-17
申请号：US17935876
申请日：2022-09-27
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Jiangjian Huang
CPC classification number: H02J50/23 , H02M3/1582
Abstract: A wireless power receiver according to some embodiments includes an integrated circuit which includes: a full-bridge rectifier coupled to receive wireless power from a receiver coil; a wireless receiver controller coupled to control the full-bridge rectifier; a pass device coupled between the full-bridge rectifier and an output; and a configurable controller coupled to the switch, the configurable controller configurable as a LDO controller or a Buck controller. A second controller can be coupled to the configurable controller that interfaces to an external Buck low-side transistor if the configurable controller is the Buck controller and provides GPIO if the configurable controller is the LDO controller. A third controller can be coupled to the full-bridge rectifier, which operates as a full-bridge sync rectifier driver multiplexer to select an external driver for one or more of the rectifier transistors. Other features are also provided.
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公开(公告)号：US11303154B2
公开(公告)日：2022-04-12
申请号：US16368791
申请日：2019-03-28
Applicant: Integrated Device Technology, Inc.
Inventor： Tao Qi , Gustavo Mehas , Rui Liu
Abstract: According to some embodiments, a magnetic secured transmission (MST) driver is provided. The MST driver includes a full-bridge switching circuit that includes a first half-bridge coupled to a first node and a second half-bridge coupled to a second node; and a control circuit coupled to drive the first half-bridge according to MST input data and to drive the second half bridge according to a high-frequency pulse width modulation (PWM) signal.
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公开(公告)号：US10705130B2
公开(公告)日：2020-07-07
申请号：US15998716
申请日：2018-08-16
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Lijie Zhao
Abstract: A method of adaptively operating a transmit detection circuit is presented. The method includes powering the transmit detection circuit with a capacitor charged by an LDO; receiving a digital ping signal from a transmitter; receiving a clock signal from a local oscillator; updating a register to accommodate timing of the digital ping signal; and generating a signal indicating whether the transmitter is present.
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公开(公告)号：US20190137554A1
公开(公告)日：2019-05-09
申请号：US15998716
申请日：2018-08-16
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Lijie Zhao
Abstract: In accordance with some embodiments of the present invention, a method of adaptively operating a transmit detection circuit is presented. The method includes powering the transmit detection circuit with a capacitor charged by an LDO; receiving a digital ping signal from a transmitter; receiving a clock signal from a local oscillator; updating a register to accommodate timing of the digital ping signal; and generating a signal indicating whether the transmitter is present.
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公开(公告)号：US20230044377A1
公开(公告)日：2023-02-09
申请号：US17935876
申请日：2022-09-27
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Jiangjian Huang
Abstract: A wireless power receiver according to some embodiments includes an integrated circuit which includes: a full-bridge rectifier coupled to receive wireless power from a receiver coil; a wireless receiver controller coupled to control the full-bridge rectifier; a pass device coupled between the full-bridge rectifier and an output; and a configurable controller coupled to the switch, the configurable controller configurable as a LDO controller or a Buck controller. A second controller can be coupled to the configurable controller that interfaces to an external Buck low-side transistor if the configurable controller is the Buck controller and provides GPIO if the configurable controller is the LDO controller. A third controller can be coupled to the full-bridge rectifier, which operates as a full-bridge sync rectifier driver multiplexer to select an external driver for one or more of the rectifier transistors. Other features are also provided.
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Patent Agency Ranking
公开(公告)号：US11005298B2
公开(公告)日：2021-05-11
申请号：US16388476
申请日：2019-04-18
Applicant: Integrated Device Technology, Inc.
Inventor： Nicholaus Smith , Rui Liu , Amit D. Bavisi , Jiangjian Huang , Gabriel Aungurencei
Abstract: In a wireless power transfer operation, the operating parameters are adjusted to improve efficiency by reducing the transmit and receive coil currents as follows. First, the transmitter causes the receiver to reduce the receive coil current to the lowest value based on the transmitter/receiver communication while still delivering the same amount of power to the load as before the AC current was adjusted to the minimum value. Then the transmitter may change the operating parameters to increase or preserve the power provided to the receiver without decreasing efficiency or with only small decrease in efficiency, or with increasing the efficiency. For example, the transmitter may increase the VBRG voltage (the DC voltage powering the transmit coil) or the operating frequency to maintain or increase output power levels at lower or the same AC and DC current levels. Other features are also provided.
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公开(公告)号：US10938255B2
公开(公告)日：2021-03-02
申请号：US16368777
申请日：2019-03-28
Applicant: Integrated Device Technology, Inc.
Inventor： Nicholaus Smith , Rui Liu , Tao Qi , Amit D. Bavisi , Chan Young Jeong
IPC: H02J50/90 , H02J50/10 , H03K17/955 , H02J7/02 , H02J50/40
Abstract: A capacitor sensor array (or grid) over a wireless power transmission coil can include a first set of lines; a second set of lines intersecting the first set of lines; a first multiplexer coupled to provide a charge (e.g. in the form of a DC voltage) from a voltage source to the first set of lines and provide first signals to detect voltages on each line; and a second multiplexer coupled to provide a charge from the voltage source to the second set of lines and provide second signals to detect voltages on each line, wherein an object positioned with respect to the first set of lines and the second set of lines is located. According to some embodiments, a wireless power receive coil and a rectifier circuit can be used in forming a capacitor sensor, to sense the capacitance between the receive and transmit coils for better alignment between the two coils. Other embodiments are also provided.
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公开(公告)号：US11211829B2
公开(公告)日：2021-12-28
申请号：US16371887
申请日：2019-04-01
Applicant: Integrated Device Technology, Inc.
Inventor： Jiangjian Huang , Feng Zhou , Zhitong Guo , Rui Liu
Abstract: 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.
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公开(公告)号：US10958154B2
公开(公告)日：2021-03-23
申请号：US16025779
申请日：2018-07-02
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Gustavo J. Mehas , Lijie Zhao
Abstract: In accordance with aspects of the present invention, a wireless power circuit is presented. In some embodiments, the wireless power circuit includes one or more high-side transistors; one or more low-side transistors coupled in series with the one or more high-side transistors, wherein the one or more low-side transistors can be controlled as current sources.
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公开(公告)号：US10804750B2
公开(公告)日：2020-10-13
申请号：US15998784
申请日：2018-08-16
Applicant: Integrated Device Technology, Inc.
Inventor： Rui Liu , Zhitong Guo , Haiwen Jiang
Abstract: 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.
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