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1.发明公开公开(公告)号：US20240154468A1
公开(公告)日：2024-05-09
申请号：US18487996
申请日：2023-10-16
Applicant: Richtek Technology Corporation
Inventor： Fu-Chi Lin
Abstract: A wireless power transmitter circuit generates a wireless transmitting power during a power supply procedure, and determines whether there is a corresponding wireless power receiver circuit near by the wireless power transmitter circuit during a groping procedure. The groping procedure includes: step S10, generating a first analog groping transmitting signal; step S20, determining whether there is an electromagnetic inductive object near by the wireless power transmitter circuit according to an electrical characteristic related to the first analog groping transmitting signal, and when yes, proceeding to step S50, otherwise proceeding back to the step S10 after a first predetermined period; step S50: generating a digital groping transmitting signal; and step S60, determining whether there is a corresponding wireless power receiver circuit near by the wireless power transmitter circuit according to a reflect signal.
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2.发明公开公开(公告)号：US20240154464A1
公开(公告)日：2024-05-09
申请号：US18485841
申请日：2023-10-12
Applicant: Richtek Technology Corporation
Inventor： Fu-Chi Lin
CPC classification number: H02J50/12 , H04B5/0037
Abstract: A wireless power transmitter circuit includes: a power stage circuit including plural switches coupled to a resonant transmitter circuit, wherein the resonant transmitter circuit includes a transmission coil and a resonant capacitor which are coupled to each other; and a transmission control circuit controlling the power stage circuit to convert an input power to a driving power according to a pulse width modulation (PWM) control signal when a corresponding wireless power receiver circuit is near by the resonant transmitter circuit. The driving power drives the resonant transmitter circuit to generate a wireless transmitting power, which is supplied to the corresponding wireless power receiver circuit. When a variation rate of a driving current of the driving power with respect to time exceeds a variation rate threshold, an operation parameter of the power stage circuit is adjusted to reduce a power level of the wireless transmitting power.
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Patent Agency Ranking
公开(公告)号：US10523032B2
公开(公告)日：2019-12-31
申请号：US16006633
申请日：2018-06-12
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Jen Huang , Chih-Hua Hou , Fu-Chi Lin
Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
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公开(公告)号：US20240380254A1
公开(公告)日：2024-11-14
申请号：US18468713
申请日：2023-09-17
Applicant: Richtek Technology Corporation
Inventor： Li-Ting Tsai , Fu-Chi Lin
Abstract: A wireless power transmitter circuit includes a power stage circuit including switches coupled to a resonant transmitter circuit; and a transmission control circuit controlling the power stage circuit and including: a modulation circuit generating a PWM control signal during a power supply procedure, to control the switches to convert a DC power and generate a wireless transmission power at the resonant transmitter circuit, thereby supplying the wireless power to a corresponding wireless power receiver circuit; a storage unit storing an authentication code-threshold database; and a communication circuit receiving an authentication code and a signal intensity value transmitted by the wireless power receiver circuit, to read an alignment intensity threshold corresponding to the authentication code from the storage unit, and to compare the signal intensity value with the alignment intensity threshold during a groping procedure to determine whether the wireless power transmitter circuit is aligned with the wireless power receiver circuit.
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公开(公告)号：US11323299B2
公开(公告)日：2022-05-03
申请号：US17337351
申请日：2021-06-02
Applicant: Richtek Technology Corporation
Inventor： Hung-Chi Huang , Fu-Chi Lin , Tsung-Nan Wu , Mei-Shu Wang
IPC: H04L27/06 , H04L27/156 , H04L1/00
Abstract: A communication signal demodulation apparatus demodulates a communication signal to generate an output signal. The communication signal demodulation apparatus includes: plural sensor circuits which sense different electrical characteristics of one same communication signal and generate corresponding sensing modulation signals respectively; plural processing filters which filter the corresponding sensing modulation signals respectively and generate corresponding filtered modulation signals respectively; plural demodulators which demodulate the plural filtered modulation signals and generate corresponding demodulation signals respectively, wherein each of the filtered modulation signals corresponds to at least one of the demodulators; and a determination circuit which receive the plural demodulation signals, determine whether each unit signal of each of the demodulation signals is correct or not according to a determination mechanism, and combine one or more correct unit signals to generate the output signal.
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公开(公告)号：US20250015641A1
公开(公告)日：2025-01-09
申请号：US18503202
申请日：2023-11-07
Applicant: Richtek Technology Corporation
Inventor： Wei-Shuo Wu , Fu-Chi Lin
Abstract: A wireless power transmitter circuit includes: an inverter circuit including plural switches coupled to a resonant transmitter circuit; and a transmitter controller circuit for generating a PWM control signal, to control the plural switches, thus generating a wireless transmission power via the resonant transmitter circuit in a power supply procedure, so that a wireless power supply is accordingly provided to a wireless power receiver circuit. In a groping procedure, transmitter controller circuit controls the plural switches to generate a wireless test power via the resonant transmitter circuit based on an operation frequency. The groping procedure includes: measuring a peak of a transmission signal corresponding to the wireless test power; determining, according to the peak of the transmission signal, whether a foreign object exists and/or whether the wireless power receiver circuit is present. When it is determined that the wireless power receiver circuit is present, the power supply procedure is performed.
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公开(公告)号：US20180375362A1
公开(公告)日：2018-12-27
申请号：US16006633
申请日：2018-06-12
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Jen Huang , Chih-Hua Hou , Fu-Chi Lin
CPC classification number: H02J7/0072 , H02J7/0055 , H02J7/022 , H02J7/025 , H02J7/04 , H02J50/10 , H02M1/10 , H02M3/07 , H02M3/158 , H02M7/2176
Abstract: A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.
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