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公开(公告)号：US20250055382A1
公开(公告)日：2025-02-13
申请号：US18668595
申请日：2024-05-20
Applicant: Myrtle Holdings, LLC
Inventor： L. Dexter Bates
Abstract: A self-oscillating electronic LC resonant inverter for use in fixed-frequency power converters, providing zero-current and zero-voltage soft switching. The inverter incorporates an active fixed-frequency series resonant current pump capable of pumping the tank circuit current up as well as down. The magnitude of the resonant current is controlled at the resonant frequency of the LC tank circuit.
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公开(公告)号：US11681316B2
公开(公告)日：2023-06-20
申请号：US17352123
申请日：2021-06-18
Applicant: Skyworks Solutions, Inc.
Inventor： Bo Zhou
CPC classification number: G05F1/575 , G05F1/46 , G05F1/468 , H02M1/12 , H02M3/3382
Abstract: Embodiments described herein present a new LDO design that eliminates the need for the sleep bias circuitry included in other systems. Further, the new LDO design can be biased with a small fraction of the operating current enabling the LDO to wake up substantially faster than previous LDO designs that include separate sleep circuitry. In some cases, the LDO can instantly (or faster than other LDOs) transition from a sleep mode to an operating mode enabling improved operation compared to prior LDOs. Furthermore, the new LDO design maintains a non-breakdown voltage across the transistors reducing the need to enter sleep mode to prevent transistors of the LDO from entering a breakdown region.
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公开(公告)号：US11418050B2
公开(公告)日：2022-08-16
申请号：US17060570
申请日：2020-10-01
Inventor： Takahiro Kudo , Yoshimitsu Odajima , Yohsuke Mitani
Abstract: A method for controlling a discharge of a power storage device includes: a first step of discharging, in a first section of a discharging period, a part of an electric charge stored in a power storage through a first discharge path and a second discharge path of a discharge circuit; and a second step of discharging, in a second section of the discharging period, a remaining part of the electric charge through the second discharge path. The first discharge path includes a zener diode connected to one end of the power storage. The second discharge path includes a first transistor connected to the one end of the power storage. The first section is a period in which a voltage of the one end of the power storage is higher than a breakdown voltage of the zener diode. The second section is a period in which a voltage of the one end of the power storage is lower than the breakdown voltage of the zener diode. An output current of the first transistor in the second section is greater than an output current of the first transistor in the first section.
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公开(公告)号：US20220239229A1
公开(公告)日：2022-07-28
申请号：US17581039
申请日：2022-01-21
Applicant: SHIMADZU CORPORATION
Inventor： Naoki YASUDA
Abstract: Provided is a high-frequency power supply device capable of causing an appropriate current to flow through a transformer. A self-oscillation high-frequency power supply device is provided with a DC power supply, an LC resonant circuit, a switching circuit, and a transformer. The LC resonant circuit includes an induction coil for plasma generation and a capacitor. The switching circuit includes a semiconductor element, the switching circuit being configured to subject DC power supplied from the DC power supply to switching processing to supply high-frequency power to the LC resonant circuit. The transformer includes a primary coil included in the LC resonant circuit and a secondary coil connected to the semiconductor element to turn on/off a semiconductor element. The transformer has a coaxial structure in which the primary coil and the secondary coil are coaxially provided. The LC resonant circuit includes a resistor connected in parallel to the primary coil.
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公开(公告)号：US20220216787A1
公开(公告)日：2022-07-07
申请号：US17193681
申请日：2021-03-05
Inventor： Yong-Liang JIN , Ya-Qi MA , Wei Li , Di FAN
Abstract: A device includes a voltage regulator circuit, a power switch circuit, and a control circuit. The voltage regulator circuit generates an output voltage at an output terminal. The power switch circuit is coupled to the voltage regulator circuit. The control circuit receives a first control signal and generates a second signal that includes a first portion gradually declining between a first time and a second time later than the first time. When the voltage regulator circuit is turned off and a logic state of the first control signal changes at the first time, the power switch circuit is turned on at the second time, in response to the second control signal, to adjust the output voltage.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210273566A1
公开(公告)日：2021-09-02
申请号：US16805175
申请日：2020-02-28
Applicant: Astec International Limited
Inventor： James SIGAMANI
Abstract: A switch-mode power supply includes a pair of input terminals for receiving an alternating current (AC) or direct current (DC) voltage input from an input power source, a pair of output terminals for supplying a direct current (DC) voltage output to a load, and at least four switches coupled in a three-level LLC circuit arrangement between the pair of input terminals and the pair of output terminals. The power supply also includes a voltage doubler power factor correction (PFC) circuit coupled between the pair of input terminals and the three-level LLC circuit, and a control circuit coupled to operate the at least four switches to supply the DC voltage output to the load.
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公开(公告)号：US10903753B2
公开(公告)日：2021-01-26
申请号：US13074760
申请日：2011-03-29
Applicant: Giovanni Frattini , Roberto G. Massolini , Maurizio Granato , David I. Anderson
Inventor： Giovanni Frattini , Roberto G. Massolini , Maurizio Granato , David I. Anderson
Abstract: A converter circuit includes a primary side having a resonator and a first control circuit configured to control the resonator. The converter circuit also includes a secondary side having a resonant rectifier and a second control circuit configured to control the resonant rectifier. The converter circuit further includes a transformer configured to electrically isolate the primary side from the secondary side. The second control circuit is configured to turn the resonant rectifier on and off. The first control circuit may be configured to detect when the resonant rectifier is off and, in response, turn the resonator off without using a feedback signal from the secondary side. The first control circuit may be configured to detect when the resonant rectifier is off by detecting when input power to the primary side decreases. The resonant rectifier could be turned on and off by detuning the resonant rectifier.
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公开(公告)号：US20190386569A1
公开(公告)日：2019-12-19
申请号：US16440932
申请日：2019-06-13
Inventor： Dominique BERGOGNE
Abstract: The present description concerns a DC/DC converter including: a transformer (2) having a primary winding (21) forming part of a self-oscillating circuit (6); a controllable circuit of application of a first DC voltage (Vin) across the self-oscillating circuit; and a circuit (8) of energy detection at the secondary (22) of the transformer.
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公开(公告)号：US10483864B1
公开(公告)日：2019-11-19
申请号：US16142543
申请日：2018-09-26
Applicant: UNIVERSAL LIGHTING TECHNOLOGIES, INC.
Inventor： Wei Xiong
Abstract: A DC-to-AC inverter provides an AC voltage to the primary winding of an output isolation transformer having at least one secondary winding. An AC output voltage from the secondary winding is rectified to generate a DC voltage, which is applied to a load. The current flowing through the load is sensed and compared to a reference magnitude to produce a feedback signal. The feedback signal controls a voltage superposition circuit via an output stage of an optocoupler. The superposition circuit generates a superposition voltage that is applied to a current control circuit, which responds to the superposition voltage to vary a control current to a switching controller, which varies the frequency of the AC voltage to thereby vary the load current. A fault detection circuit senses a short in the output stage of the optocoupler to disable the operation of switching controller to prevent an overvoltage and an overcurrent.
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公开(公告)号：US10340807B2
公开(公告)日：2019-07-02
申请号：US15838745
申请日：2017-12-12
Applicant: Futurewei Technologies, Inc.
Inventor： Daoshen Chen , Heping Dai , Xujun Liu , Liming Ye , Dianbo Fu
Abstract: A device comprises a gate drive bridge coupled between a bias voltage of a power converter and ground and a transformer connected to the gate drive bridge, wherein the transformer comprises a primary winding connected to two legs of the gate drive bridge respectively and a plurality of secondary windings configured to generate gate drive signals for low side switches, high side switches and secondary switches of the power converter.
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