-
11.发明申请公开(公告)号：US20220271674A1
公开(公告)日：2022-08-25
申请号：US17673062
申请日：2022-02-16
Applicant: Richtek Technology Corporation
Inventor： Ta-Yung Yang , Ying-Chieh Su , Yu-Chang Chen
Abstract: A resonant half-bridge flyback power converter includes: a first transistor and a second transistor which form a half-bridge circuit; a transformer and a resonant capacitor connected in series and coupled to the half-bridge circuit; and a switching control circuit configured to generate a first driving signal and a second driving signal to control the first transistor and the second transistor respectively for switching the transformer to generate an output voltage. The first driving signal is configured to magnetize the transformer. The second driving signal includes at most one pulse between two consecutive pulses of the first driving signal. The switching control circuit generates a skipping cycle period when an output power is lower than a predetermined threshold. A resonant pulse of the second driving signal is skipped during the skipping cycle period. The skipping cycle period is increased in response to the decrease of the output power.
-
公开(公告)号：US20220271645A1
公开(公告)日：2022-08-25
申请号：US17680245
申请日：2022-02-24
Applicant: Richtek Technology Corporation
Inventor： Wei-Hsu Chang , Shih-Jen Yang , Yi-Wei Lee , Ta-Yung Yang
Abstract: A multiple output universal serial bus travel adaptor includes: at least one AC-DC converter for converting an AC power to a first DC power; at least one DC-DC converter for providing a second DC power according to the first DC power; plural switches which are coupled to the AC-DC converter and/or the DC-DC converter to provide the first DC power or the second DC power to corresponding connectors according to operation signals; and a protocol controller configured to generate the operation signals according to at least one of the following parameters: a) the types of the connectors; b) whether there is a mobile device connected with the connectors; c) a first command from the mobile device; d) the power consumed by the mobile devices; e) the currents flowing through the connectors; and f) the voltages at the connectors.
-
公开(公告)号：US20220157982A1
公开(公告)日：2022-05-19
申请号：US17506422
申请日：2021-10-20
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Kuo-Chin Chiu , Ta-Yung Yang , Chien-Wei Chiu , Wu-Te Weng , Chien-Yu Chen , Chih-Wen Hsiung , Chun-Lung Chang , Kun-Huang Yu , Ting-Wei Liao
IPC: H01L29/78 , H01L29/872 , H01L29/66
Abstract: A high voltage device for use as an up-side switch of a power stage circuit includes: at least one lateral diffused metal oxide semiconductor (LDMOS) device, a second conductivity type isolation region and at least one Schottky barrier diode (SBD). The LDMOS device includes: a well formed in a semiconductor layer, a body region, a gate, a source and a drain. The second conductivity type isolation region is formed in the semiconductor layer and is electrically connected to the body region. The SBD includes: a Schottky metal layer formed on the semiconductor layer and a Schottky semiconductor layer formed in the semiconductor layer. The Schottky semiconductor layer and the Schottky metal layer form a Schottky contact. In the semiconductor layer, the Schottky semiconductor layer is adjacent to and in contact with the second conductivity type isolation region.
-
公开(公告)号：US11329489B2
公开(公告)日：2022-05-10
申请号：US16666358
申请日：2019-10-28
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Hsu Chang , Ta-Yung Yang
Abstract: A rechargeable battery is coupled to a power delivery unit or an external load unit. In a charging mode, the power delivery unit converts an input power to a converted voltage and/or current. A charging circuit converts the converted voltage and/or current to a charging voltage and/or current for charging the rechargeable battery. Power data is communicated between the power delivery unit and the rechargeable battery by: 1) the power delivery unit adjusting the converted voltage, wherein the power data is expressed by plural voltage levels of the converted voltage; and/or 2) the rechargeable battery adjusting a battery input current, wherein the power data is expressed by plural current levels of the battery input current. At least one of the converted voltage, the converted current, the charging voltage, or the charging current is adjusted according to the power data.
-
公开(公告)号：US20220029531A1
公开(公告)日：2022-01-27
申请号：US17361866
申请日：2021-06-29
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Chung-Lung Pai
IPC: H02M3/07
Abstract: A resonant switching power converter includes: capacitors, switches, at least one charging inductor, at least one discharging inductor and a pre-charging circuit. The pre-charging circuit controls a first switch of the switches when the resonant switching power converter operates in a pre-charging mode, to control an electrical connection relationship between the input voltage and a first capacitor of the capacitors and to control other capacitors of the capacitors, thus controlling the capacitors to be connected in parallel to one another or to be connected in series to one another, so that when a voltage drop across the first capacitor is lower than a predetermined voltage, the voltage drop across each capacitor is charged to the predetermined voltage. After operating in the pre-charging mode, the resonant switching power converter subsequently operates in a resonant voltage conversion mode, to thereby convert an input voltage to an output voltage.
-
Patent Agency Ranking
公开(公告)号：US20210384820A1
公开(公告)日：2021-12-09
申请号：US17319728
申请日：2021-05-13
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Chung-Lung Pai
Abstract: A two-stage power converter includes: a resonant switched-capacitor converter (RSCC) receiving an input voltage and generating a first stage voltage; a voltage regulator receiving the first stage voltage and generating an output voltage; and a communication interface and control circuit generating a charging operation signal, at least one discharging operation signal and a switching signal. The charging operation signal and the discharging operation signal are employed to control the RSCC to perform a charging process and at least one discharging process respectively, and the switching signal is employed to control the voltage regulator, so as to synchronize a resonant frequency of the RSCC and a switching frequency of the voltage regulator. The communication interface and control circuit adjusts a delay interval after the discharging process ends, and starts the charging process at an end time point of the delay interval.
-
公开(公告)号：US20210367520A1
公开(公告)日：2021-11-25
申请号：US17244920
申请日：2021-04-29
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Chung-Lung Pai , Ta-Yung Yang
IPC: H02M3/158 , H02M3/00 , G01R19/175 , H02M1/00
Abstract: A resonant switching power converter includes: plural capacitors; plural switches; at least one charging inductor; at least one discharging inductor; a controller which generates a charging operation signal and at least one discharging operation signal; and at least one zero current detection circuit which detects a charging resonant current flowing through the charging inductor in a charging process and/or detect a discharging resonant current flowing through the discharging inductor in a discharging process. When detecting that a level of the charging resonant current or a level of the discharging resonant current is zero, the zero current detection circuit generates at least one zero current detection signal which is sent to the controller. The controller determines start time points and end time points of the charging process and the discharging process according to the zero current detection signal. There can be plural discharging processes.
-
公开(公告)号：US20200067322A1
公开(公告)日：2020-02-27
申请号：US16666358
申请日：2019-10-28
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Wei-Hsu Chang , Ta-Yung Yang
Abstract: A rechargeable battery is coupled to a power delivery unit or an external load unit. In a charging mode, the power delivery unit converts an input power to a converted voltage and/or current. A charging circuit converts the converted voltage and/or current to a charging voltage and/or current for charging the rechargeable battery. Power data is communicated between the power delivery unit and the rechargeable battery by: 1) the power delivery unit adjusting the converted voltage, wherein the power data is expressed by plural voltage levels of the converted voltage; and/or 2) the rechargeable battery adjusting a battery input current, wherein the power data is expressed by plural current levels of the battery input current. At least one of the converted voltage, the converted current, the charging voltage, or the charging current is adjusted according to the power data.
-
公开(公告)号：US12199516B2
公开(公告)日：2025-01-14
申请号：US18486261
申请日：2023-10-13
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang
Abstract: A multi-phase switching converter, includes: plural sub-switching converters; and a control circuit. Plural switching signals operate a capacitor of one of the plural sub-switching converters and a capacitor of another one of the plural sub-switching converters, to conduct a switched capacitor switching on a first voltage, thus switching an inductor switching node in each sub-switching converter between a divided voltage of the first voltage and a reference potential and to thereby execute a power conversion between the first voltage and a second voltage. When the inductors of each of the plural sub-switching converters are coupled with one another in a non-electromagnetic fashion, the multi-phase switching converters operate in a non-resonant mode. When the inductors of at least two of the plural sub-switching converters are electromagnetically coupled with one another, the multi-phase switching converters operate in a resonant mode or in the non-resonant mode.
-
20.发明授权公开(公告)号：US12184168B2
公开(公告)日：2024-12-31
申请号：US17838195
申请日：2022-06-11
Applicant: Richtek Technology Corporation
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Chung-Lung Pai
Abstract: A switched capacitor voltage converter circuit includes: a switched capacitor converter and a control circuit; wherein the control circuit adjusts operation frequencies and/or duty ratios of operation signals which control switches of the switched capacitor converter, so as to adjust a ratio of a first voltage to a second voltage to a predetermined ratio. When the control circuit decreases the duty ratios of the operation signals, if a part of the switches of the switched capacitor converter are turned ON, an inductor current flowing toward the second voltage is in a first state; if the inductor current continues to flow via a current freewheeling path, the inductor current flowing toward the second voltage becomes in a second state. A corresponding inductor is thereby switched between the first state and the second state to perform inductive power conversion.
-
-
-
-
-
-
-
-
-
Search Results
138
records
(took 0.016 seconds)
