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公开(公告)号：US12199507B2
公开(公告)日：2025-01-14
申请号：US18525865
申请日：2023-12-01
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang
Abstract: A multi-phase switching converter includes: first and second sub-switching converters; switching signals operating first and second capacitors of the first and second sub-switching converters to respectively perform a switched capacitor switching on a first voltage between plural electrical connection states, to respectively switch a first and second switching nodes between a first and second divided voltages of the first voltage obtained from the switched capacitor switching and a first and second reference voltage potentials thereby performing the power conversion between a first and second power nodes. Each of a first and second switch circuits of the first and second sub-switching converters has corresponding plural first and second switches and corresponding first and second subsidiary switch. Each of the first and second subsidiary switch is coupled between the first and second capacitors and the first and second switching nodes, to respectively decide whether the first and second capacitor is electrically connected to a first and second inductor according to the switching signal corresponding to the first and second subsidiary switch, respectively.
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公开(公告)号：US12184183B2
公开(公告)日：2024-12-31
申请号：US17673158
申请日：2022-02-16
Applicant: Richtek Technology Corporation
Inventor： Ta-Yung Yang , Ying-Chieh Su , Yu-Chang Chen
Abstract: A flyback power converter includes: a first transistor switching a transformer for generating a primary switching current and an output voltage; and a second transistor generating a circulated current to achieve ZVS (zero voltage switching) of the first transistor; wherein the flyback power converter actively forces at least one switching cycle to be operated in a DCM (discontinuous conduction mode) operation when the primary switching current is determined to have been operating in a non-DCM operation for a predetermined number of switching cycles. The flyback power converter generates a demagnetized signal which emulates the demagnetized time of the transformer for controlling the second transistor during the non-DCM operation. The flyback power converter calibrates the demagnetized signal according to the demagnetized time during the actively fored DCM operation.
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公开(公告)号：US12153089B2
公开(公告)日：2024-11-26
申请号：US18165490
申请日：2023-02-07
Applicant: Richtek Technology Corporation
Inventor： Fu-Shiang Lai
IPC: G01R31/317
Abstract: An electronic device is provided, which includes an oscillator, a controller, and a test circuit. The oscillator generates a clock signal according to an enable signal. The oscillator determines a period of the clock signal according to an adjustment signal. The controller generates the enable signal and generates a first test signal according to the clock signal. The controller determines the period according to a first comparison signal and a second comparison signal. The test circuit, through the first test signal, tests the period to generate the first comparison signal and the second comparison signal.
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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：US20240356459A1
公开(公告)日：2024-10-24
申请号：US18337154
申请日：2023-06-19
Applicant: Richtek Technology Corporation
Inventor： Tsan-Huei Wu , Tsung-Wei Huang , Ye-Sing Luo
IPC: H02M7/5395 , H02M1/00
CPC classification number: H02M7/5395 , H02M1/0012 , H02M1/0019
Abstract: A power conversion system includes: first and second switches, a switching power converter, a battery switch and a conversion control circuit. In an external power mode, the first and second switches are controlled to generate an intermediate power from a first power and generate a second power from the intermediate power for powering an external load. In a battery power mode, the conversion control circuit controls the battery switch, the switching power converter and the second switch to generate a system power from a battery power, convert the system power to generate the intermediate power and generate the second power from the intermediate power. In the external power mode, the switching power converter is controlled to enter the battery power mode when the intermediate voltage is reduced to a transient state threshold, wherein a minimum voltage level of the intermediate power is close to a minimum voltage regulation level.
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Patent Agency Ranking
公开(公告)号：US12101020B2
公开(公告)日：2024-09-24
申请号：US17929733
申请日：2022-09-05
Applicant: Richtek Technology Corporation
Inventor： Tsung-Wei Huang , Shui-Mu Lin
CPC classification number: H02M1/0095 , H02J7/007 , H02M1/008 , H02M3/07 , H02M3/1582
Abstract: A multi-mode power system includes a battery module, a first conversion circuit, and a second conversion circuit. The battery module includes a battery path switch and a battery group. The first conversion circuit includes switches and a first capacitor, wherein the switches include the battery path switch. The multi-mode power system operates in one of plural operation mode combinations, wherein when the first conversion circuit operates in a first outgoing mode or a first bypass mode, the second conversion circuit operates in a second incoming mode, a second outgoing mode, or a second bypass mode; when the first conversion circuit operates in a first incoming mode, the second conversion circuit operates in the second incoming mode or the second bypass mode.
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7.发明公开公开(公告)号：US20240313566A1
公开(公告)日：2024-09-19
申请号：US18492879
申请日：2023-10-24
Applicant: Richtek Technology Corporation
Inventor： Ping-Fan Wang , Po-Chen Liu , Jui-Cheng Yang , Hung-Chi Chen
IPC: H02J7/00
CPC classification number: H02J7/00714 , H02J7/0047
Abstract: A charging/discharging power conversion system includes: a current control circuit, wherein a serial connection of a second battery and the current control circuit is connected in parallel to a first battery between a charging node and a reference voltage level; and an auxiliary current control circuit, including: a current measurement circuit measuring a first battery current and generate a battery current signal; and a current adjustment circuit adjusting a charging current according to the battery current signal via an adjustment procedure, to render the first battery current not to be greater than a first battery current threshold; wherein the adjustment procedure includes: setting the first battery current threshold; setting an initial value of the charging current, such that the initial value of the charging current is equal to a sum of the first battery current threshold plus a second battery current threshold.
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公开(公告)号：US20240243660A1
公开(公告)日：2024-07-18
申请号：US18495775
申请日：2023-10-27
Applicant: Richtek Technology Corporation
Inventor： Jung-Sheng Chen , Chin-Chun Chuang , Che-Wei Chang , Shi-Xian Wang
CPC classification number: H02M3/156 , H02M1/0032
Abstract: A switching converter having pulse skipping mode includes a power stage circuit, a feedback control circuit, an operating signal generator circuit and a pulse skipping circuit. The feedback control circuit generates an initial pulse width modulation (PWM) signal according the output power. The operating signal generator circuit masks a part of pulses of a clock signal according to a pulse width of a pulse skipping signal, so as to generate an adjusted PWM signal. The pulse skipping circuit adaptively generates a duty ratio signal according to an input voltage and an output voltage, so as to generate the pulse skipping reference signal related to a duty ratio of the initial PWM signal. The pulse skipping circuit compares an amplification signal with the pulse skipping reference signal to generate the pulse skipping signal. The power stage circuit converts the input power to the output power according to the adjusted PWM signal.
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公开(公告)号：US20240231409A1
公开(公告)日：2024-07-11
申请号：US18507084
申请日：2023-11-12
Applicant: Richtek Technology Corporation
Inventor： Chih-hsien Wang , Chu-hua Lee
Abstract: A body bias circuit configured to generate a body bias to a body of a MOS switch. The body bias circuit includes: an intrinsic MOS device having the same conductivity type with the MOS switch and having an intrinsic threshold voltage; and an operational regulation circuit coupled to the intrinsic MOS device and configured to generate the body bias according to a voltage of one terminal of the MOS switch and the intrinsic threshold voltage, such that a threshold voltage of the MOS switch inversely tracking the intrinsic threshold voltage. The body bias is lower than each voltage of both terminals of the MOS switch. The body bias is configured to an extent that an ON resistance of the MOS switch is lower than a predetermined value during a conducting operation, and/or a leakage current of the MOS switch is lower than a predetermined value during a non-conducting operation.
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公开(公告)号：US12009823B2
公开(公告)日：2024-06-11
申请号：US18049611
申请日：2022-10-25
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Yi-Kuang Chen
Abstract: A pulse width modulation (PWM) method for converting an input signal into an output PWM signal includes the following steps: generating a first linear periodic wave and a second linear periodic wave which are triangle waves or sawtooth waves, wherein the amplitude of the first linear periodic wave is greater than the amplitude of the second linear periodic wave; determining whether the level of the input signal is lower than a light load threshold; when the level of the input signal is lower than the light load threshold, generating the output PWM signal according to a comparison between the input signal and the second linear periodic wave; and when the level of the input signal is higher than the light load threshold, generating the output PWM signal according to a comparison between the input signal and the first linear periodic wave.
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