With Additional Series Regulator Patents (Class 323/224)
  • Patent number: 11979052
    Abstract: A power source device includes a step-up circuit, a diode for backflow prevention, and an electrolytic capacitor. The step-up circuit is connected to a power source on an input side thereof and is connected to a first load and a second load in parallel on an output side thereof. The diode for backflow prevention is connected between the step-up circuit and the first load. The electrolytic capacitor is connected between the diode for backflow prevention and the first load.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: May 7, 2024
    Assignee: DENSO TEN Limited
    Inventor: Tomoyuki Minami
  • Patent number: 11909309
    Abstract: Stable switching is disclosed for a power factor correction boost converter using an input voltage and an output voltage. In one example, a boost converter control system includes a gate driver coupled to a switch of a boost converter to generate a drive signal to control switching of the switch, wherein a period of the drive signal is adjusted using a current adjustment signal. A current control loop is coupled to the gate driver to receive a sensed input current from the boost converter and a desired input current and to generate the current adjustment signal to the gate driver. A current limiter is coupled to the gate driver and the current control loop to determine a duty cycle of the switch, to determine a maximum input current in response to the duty cycle, and to restrict the desired input current to below the maximum input current.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: February 20, 2024
    Assignee: NXP USA, Inc.
    Inventors: Remco Twelkemeijer, Wilhelmus Hinderikus Maria Langeslag
  • Patent number: 11899486
    Abstract: A current mode control type switching power supply device includes a first switch having a first terminal connected to a first application terminal to which an input voltage is applied, and a second switch having a first terminal connected to a second terminal of the first switch and a second terminal connected to a second application terminal to which a predetermined voltage lower than the input voltage is applied. A current sensor is configured to sense current flowing in the second switch. A controller configured to control the first switch and the second switch, wherein the controller is configured to control the first switch and the second switch independently of a difference between the input voltage and an output voltage and in addition in accordance with the current sensed by the current sensor.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: February 13, 2024
    Assignee: Rohm Co., Ltd.
    Inventor: Yuhei Yamaguchi
  • Patent number: 11901806
    Abstract: A disconnect switch for a power converter is disclosed. An apparatus includes an inductor coupled between an input power supply node and a switch node, and a converter circuit configured to generate a particular voltage level on a boost node using a voltage level of the switch node. An output circuit is configured to provide the particular voltage level on the regulated power supply node using a voltage level of the boost node. In response to a determination that the regulated power supply node has been shorted to ground, the output circuit is configured isolate the boost node from the regulated power supply node. In response to a detection of a regulation event, the output circuit is configured to reduce the voltage level of the boost node to generate a reduced voltage on the regulated power supply node.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: February 13, 2024
    Assignee: Apple Inc.
    Inventors: Giovanni Saccomanno, Bogdan-Eugen Matei, Yesim Inam
  • Patent number: 11881846
    Abstract: To prevent deterioration of current detection accuracy due to a difference in deterioration between a main MOS and a sense MOS. The load drive device includes a main MOS (101) for supplying a load current to a load, a sense MOS (102) to be used for detection of the load current, and an equalizer circuit (110) and a switch (120) which are provided in parallel between the source terminal of the main MOS and the source terminal of the sense MOS. The drain terminal of the main MOS and the drain terminal of the sense MOS have a common connection, and when a current is detected, the terminal voltage of the main MOS and the terminal voltage of the sense MOS are equalized by the equalizer circuit, and the switch is opened. When a current is not detected, the equalizer circuit is stopped and the switch short-circuits the source terminal of the main MOS and the source terminal of the sense MOS.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: January 23, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Keishi Komoriyama, Yoichiro Kobayashi
  • Patent number: 11881783
    Abstract: An electronic device has a power rail that is driven by voltage regulators and provides a rail voltage. Each voltage regulator has an output interface electrically coupled to the power rail to deliver up to a predefined regulator current to the power rail. In each voltage regulator, a voltage regulator controller has an input coupled to the output interface by a feedback path and controls a drive path coupled to the output interface. A bypass unit is coupled to the drive path and voltage regulator controller and operates in a standby mode or an operational mode. In the standby mode, the bypass unit bypasses the feedback path and the respective voltage regulator does not deliver current to the power rail, while in the operational mode, the bypass unit does not bypass the feedback path and the respective voltage regulator delivers up to the predefined regulator current to the power rail.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: January 23, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Peng Zou, Xijian Lin, Gang Ren, Joseph Dibene, Syrus Ziai
  • Patent number: 11881771
    Abstract: A controller for a half-bridge power circuit includes a measurement circuit, a controller circuit, a high-side delay circuit, and a low-side delay circuit. The measurement circuit connects to the half-bridge node, measures the half-bridge voltage, and generates a multi-bit status signal indicative of the measured half-bridge voltage. The controller circuit connects to the measurement circuit, and receives the status signal therefrom. The controller circuit generates at least a delay control signal based on the status signal. The high-side delay circuit connects to the controller circuit to receive the delay control signal. The high-side delay circuit provides a high-side control signal in response to the delay control signal, to switch on/off the high-side switch. The low-side delay circuit connects to the controller circuit to receive the delay control signal. The low-side delay circuit provides a low-side control signal in response to the delay control signal, to switch on/off the low-side switch.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: January 23, 2024
    Assignee: NXP USA, INC.
    Inventors: Bo Fan, Meng Wang, Pengcheng Lin
  • Patent number: 11817778
    Abstract: An apparatus for electric power conversion includes a converter having a regulating circuit and switching network. The regulating circuit has magnetic storage elements, and switches connected to the magnetic storage elements and controllable to switch between switching configurations. The regulating circuit maintains an average DC current through a magnetic storage element. The switching network includes charge storage elements connected to switches that are controllable to switch between plural switch configurations. In one configuration, the switches forms an arrangement of charge storage elements in which at least one charge storage element is charged using the magnetic storage element through the network input or output port. In another, the switches form an arrangement of charge storage elements in which an element discharges using the magnetic storage element through one of the input port and output port of the switching network.
    Type: Grant
    Filed: October 6, 2022
    Date of Patent: November 14, 2023
    Assignee: pSemi Corporation
    Inventor: David M. Giuliano
  • Patent number: 11774992
    Abstract: Disclosed is a power supply device including a first direct-current power source that generates a direct-current voltage to be supplied to a device that is a load, and a second direct-current power source that generates a direct-current voltage to be supplied to a sensor that detects a physical quantity. The first direct-current power source is an output variable type power source that generates a direct-current voltage that changes according to a signal from the sensor, and the second direct-current power source is an output fixed type power source that generates a constant direct-current voltage.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: October 3, 2023
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi Takano, Shinichiro Maki, Katsuhiro Yokoyama
  • Patent number: 11777409
    Abstract: An inductive current simulation circuit of a switching circuit, an inductive current simulation method of the switching circuit, and a switched-mode power supply are provided. The inductive current simulation method includes the following steps: based on an error amplification circuit, performing, by the error amplification circuit, an error amplification on a first sampling signal representing a current of a synchronous rectifier and a second sampling signal representing an inductive current simulation signal when the synchronous rectifier is turned on to obtain an error amplification signal; and reconstructing an inductive current according to the error amplification signal when the synchronous rectifier is turned on and a first current when a main power transistor is turned on to obtain the inductive current simulation signal.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: October 3, 2023
    Assignee: JOULWATT TECHNOLOGY CO., LTD.
    Inventor: Aimin Xu
  • Patent number: 11750094
    Abstract: A control circuit for a switching converter, where: the control circuit is configured to generate a switching control signal according to an output voltage of the switching converter to control a switching state of a power transistor in the switching converter, and to adjust an output current of the switching converter; and a change trend of a length of a switching period of the power transistor is opposite to a change trend of the output voltage.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: September 5, 2023
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 11716079
    Abstract: A method of operating a driver circuit includes receiving a data signal at a first input of an amplification circuit; amplifying, using the amplification circuit, the data signal to produce an output signal through an output pin; attenuating, using a feedback network, the output signal to produce a feedback signal; coupling the feedback signal to a second input of the amplification circuit; detecting, using a control circuit, a fault condition; and decoupling, responsive to detecting the fault condition, the feedback signal from the second input of the amplification circuit. In some embodiments, the driver circuit transmits a fault condition signal to an electronic control unit of an automobile.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: August 1, 2023
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Michal Olsak, Pavel Baros
  • Patent number: 11695334
    Abstract: A method includes configuring a switched capacitor converter to operate in a first fixed PWM mode, wherein in the first fixed PWM mode, the switched capacitor converter is configured to charge a battery coupled to an input of the switched capacitor converter, configuring the switched capacitor converter to operate in a second fixed PWM mode, wherein in the second fixed PWM mode, the switched capacitor converter is configured to discharge the battery, and configuring the switched capacitor converter to operate in a skip mode, wherein the switched capacitor converter has automatic transitions among different modes based on comparisons between an output voltage of the switched capacitor converter and a plurality of predetermined voltage thresholds.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: July 4, 2023
    Assignee: NuVolta Technologies (Shanghai) Co., Ltd.
    Inventors: Cheng Liu, Fuchun Zhan, Yushi Liu
  • Patent number: 11695373
    Abstract: One example includes a differential amplifier, a voltage weighting element, coupled to a voltage source which provides an input voltage, to provide a reference voltage with a constant power limit when the input voltage varies, an error amplifier configured to receive and compare the reference voltage provided from the voltage weighting element and a feedback sensed voltage provided from the differential amplifier to identify whether the sensed voltage exceeds the reference voltage, and a pulse width modulation (PWM) controller, coupled to a power transformer and the error amplifier, that reduces a transformer input current provided to the power transformer based on the comparison of the reference voltage from the voltage weighting element and the feedback sensed voltage from the differential amplifier.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: July 4, 2023
    Assignee: Biamp Systems, LLC
    Inventors: David F. Baretich, Simon J. Broadley
  • Patent number: 11689101
    Abstract: Circuits and methods for adding a Current Mode signal into a Voltage Mode controller for fixed-frequency DC-to-DC power converters. A current-controlled voltage source (CCVS) generates a voltage proportional to the power converter output current, which voltage is combined with a comparison signal generated by comparing a target output voltage to the actual output voltage. The modified comparison signal generates a pulse-width modulation control signal that regulates the power converter output as a function of output voltage and some portion of output current. With the addition of an inductor current signal into the controller Voltage Mode feedback loop, the double pole predominant in constant conduction mode (CCM) mode can be smoothed over to improve stability, while discontinuous conduction mode (DCM) loop response is largely unchanged with or without the added Current Mode signal. Embodiments enable simplified compensation while covering a wider operating range.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: June 27, 2023
    Assignee: pSemi Corporation
    Inventors: Brian Zanchi, Tim Wen Hui Yu, Gregory Szczeszynski
  • Patent number: 11671026
    Abstract: A method involves receiving, at an active clamp controller circuit, an active clamp switch current that passes through an active clamp switch. The active clamp switch is enabled using the active clamp controller circuit in response to determining, based on the active clamp switch current, body-diode conduction of the active clamp switch. The active clamp switch is disabled using the active clamp controller circuit in response to determining, based on the active clamp switch current, a first zero-crossing of the active clamp switch current and a second zero-crossing of the active clamp switch current.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: June 6, 2023
    Assignee: Appulse Power Inc.
    Inventor: Aleksandar Radic
  • Patent number: 11641122
    Abstract: A pulse charging for a battery includes multi-stage voltage conversion. At first stage, an input voltage from a power supply is divided into a plurality of intermediate voltages. At second stage, one or more of the plurality of intermediate voltage are further down converted to generate one or more portions of a charging pulse to be applied to the battery. The down conversion of the input voltage to the output voltage is accompanied by increase in charging current that is applied to the battery. The higher charging current applied to the battery results in fast charging of the battery. Also, the described multi-stage voltage conversion circuitry has high efficiency which alleviates problem of heat dissipation associated with the voltage conversion for charging of the battery.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: May 2, 2023
    Assignee: Gbatteries Energy Canada Inc.
    Inventors: Oleksandr Tkachenko, Mykola Sherstyuk, Aleksandar Prodic, Timothy McRae, Ivan Radovic, Oleksandr Puzakov
  • Patent number: 11626802
    Abstract: A DC-DC converter of a synchronous rectification type includes a synchronous rectification transistor and a backflow detection circuit which detects a reverse current based on a voltage across the synchronous rectification transistor. The backflow detection circuit includes a first-stage differential input circuit including a first transistor, a first resistor, a second transistor, a second resistor and a fifth transistor, and a second-stage differential input circuit including a third transistor and a fourth transistor. The fifth transistor is of a same conductive type as the synchronous rectification transistor and contains a drain connected to the other end of the first resistor with respect to an end connected to the first transistor.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: April 11, 2023
    Assignee: ABLIC Inc.
    Inventor: Yoshiomi Shiina
  • Patent number: 11601018
    Abstract: A control system for a wireless power transfer (WPT) system includes current sampling modules, voltage sampling modules, a logic conversion circuit, and a controller area network (CAN) communication module that are all connected to a microprocessor module; the current sampling module is connected to the logic conversion circuit through a signal isolation circuit, the logic conversion circuit is connected to a pulse-width modulation (PWM) module, the PWM module is connected to an inverter circuit or a DC/DC converter, and the current sampling module and the voltage sampling module are connected to a primary side or a secondary side of the WPT system; transmitter coils on the primary side are spaced apart on the road, a receiver coil on the secondary side is disposed on a chassis of an electric vehicle, and the transmitter coil includes a double rectangular coil, a ferrite core surface, and a shielding aluminum plate.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: March 7, 2023
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Zhitao Liu, Jia Liu, Hongye Su
  • Patent number: 11588388
    Abstract: A control device of a power supply system includes a processor configured to set a sampling period, at which measurement values of a reactor current flowing through a reactor of a DC-DC converter and measured by an ammeter are sampled, so as to minimize a sum of differences between the length of a first period in a switching cycle of a switching element of the DC-DC converter and an integer multiple of the sampling period and between the length of a second period in the switching cycle and an integer multiple of the sampling period, the reactor current increasing during the first period and decreasing during the second period; sample, at intervals of the sampling period, measurement values of the reactor current measured by the ammeter; and average measurement values sampled in the switching cycle, thereby measuring an average of the reactor current in the switching cycle.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: February 21, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daiki Yaginuma, Masato Nonaka, Keidai Minami, Masaharu Kimura, Tomohiko Kaneko
  • Patent number: 11581805
    Abstract: In a power converter that includes a switched-capacitor circuit connected to a switched-inductor circuit, reconfiguration logic causes the switched-capacitor circuit to transition between first and second switched-capacitor configurations with different voltage-transformation ratios. A compensator compensates for a change in the power converter's forward-transfer function that would otherwise result from the transition between the two switched-capacitor configurations.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: February 14, 2023
    Assignee: PSEMI CORPORATION
    Inventor: Gregory Szczeszynski
  • Patent number: 11575319
    Abstract: A DC-DC converter includes a high-side switch coupled between a first power supply and an output terminal, a low-side switch coupled between a second power supply and the output terminal, an inductor coupled to the output terminal, and a reverse current monitoring circuit that determines that a reverse current from the inductor to the output terminal occurs when the output terminal becomes a high voltage during a state in which the high-side switch and the low-side switch are in a dead time.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: February 7, 2023
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Masayuki Ida, Yasuhiko Kokami, Hideyuki Tajima, Hiroyuki Inoue, Noboru Inomata
  • Patent number: 11557969
    Abstract: A system includes: 1) a battery configured to provide an input voltage (VIN); 2) switching converter circuitry coupled to the battery, wherein the switching converter circuitry includes a power switch; 3) a load coupled to an output of the switching converter circuitry; and 4) a control circuit coupled to the power switch. The control circuit includes: 1) a switch driver circuit coupled to the power switch; 2) a summing comparator circuit configured to output a first control signal that indicates when to turn the power switch on; and 3) an analog on-time extension circuit configured to extend an on-time of the power switch by gating a second control signal with the first control signal, wherein the second control signal indicates when to turn the power switch off.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: January 17, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Zejing Wang, Zhujun Li, Songming Zhou, Yu Wang
  • Patent number: 11552561
    Abstract: A converter circuit. In one aspect, the converter circuit includes an input terminal, a first output terminal and a second output terminal, and first, second, third and fourth capacitors coupled to a plurality of switches, where the plurality of switches are arranged to repetitively cycle the first, second, third and fourth capacitors between a first state and a second state to generate first and a second output voltages, where in the first state, the first and second capacitors are connected in parallel with each other and in series with a third capacitor to apply a first fraction of an input voltage at the first output terminal, and in the second state, the first and second capacitors are connected in series with each other and in parallel with the fourth capacitor to apply a second fraction of the input voltage at the second output terminal.
    Type: Grant
    Filed: June 28, 2022
    Date of Patent: January 10, 2023
    Assignee: Empower Semiconductor, Inc.
    Inventor: Trey Roessig
  • Patent number: 11545901
    Abstract: The present disclosure provides a control system of a buck converter, relating to the field of Internet of Things. The control system of a buck converter provided in an embodiment of the present disclosure includes a first control module, a second control module, and a mode selector. The first control module is turned on and the second control module is turned off through an analog current sensor in the mode selector when an IoT device switches from a transmission mode to a sleep mode or a standby mode, so that the first control module outputs a first voltage pulse to the driving and level shifter module, wherein a frequency of the first voltage pulse is determined by a frequency of a first clock in the first control module, and a width of the first voltage pulse is determined by a frequency of a second clock in the first control module.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: January 3, 2023
    Assignee: University of Macau
    Inventors: Wenliang Zeng, Chi Seng Lam, Sai Weng Sin, Weng Keong Che, Rui Paulo Da Silva Martins, Ran Ding
  • Patent number: 11539290
    Abstract: A power management circuit operable with low battery is provided. The power management circuit is configured to generate a time-variant average power tracking (APT) voltage based on a battery voltage supplied by a voltage source (e.g., battery). In examples disclosed herein, the power management circuit can be configured to remain operable when the battery voltage drops below a low battery threshold. Specifically, the power management circuit maintains the time-variant APT voltage at a constant level in response to the battery voltage dropping below the low battery threshold to thereby avoid drawing a rush current from the voltage source. As a result, a wireless device employing the power management circuit can remain operable with low battery to continue to support critical applications.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: December 27, 2022
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Michael R. Kay
  • Patent number: 11509301
    Abstract: An electronic switch includes a current sensor and a semiconductor switch having two semiconductors configured to carry and disconnect a current in both directions, and a control circuit configured to operate the semiconductor switch by pulse-width modulation and to determine a phase control factor of the pulse-width modulation as a function of measurement values of the current sensor such that in fault-free operation, the electronic switch remains in the ON state and that two limit values exist for protection. The electronic switch is operated by pulse-width modulation when a first one of the two limit values is exceeded, and the electronic switch is switched off when a second one of the two limit values, which is greater than the first limit value, is exceeded. The electronic switch is configured to reduce an edge steepness of a switching edge as the phase control factor decreases.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: November 22, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Markus Matthias Gaudenz
  • Patent number: 11507121
    Abstract: A circuit includes a reference voltage generator circuit and a regulation loop circuit having an output voltage terminal. The regulator circuit further includes a fault detection circuit having a first input terminal coupled to the output voltage regulator terminal of the regulation loop circuit. The fault detection circuit asserts, on an output terminal of the fault detection circuit, a fault flag signal responsive to a voltage on the first input terminal falling below a first threshold. A programmable filter is coupled between the reference voltage generator circuit and the regulation loop circuit and is coupled to the fault detection circuit. The programmable filter has a programmable time constant. The programmable filter responds to an assertion of the fault flag signal by decreasing the time constant.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: November 22, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rohit Phogat, Ramakrishna Ankamreddi, Siddhant Rohela
  • Patent number: 11496047
    Abstract: An apparatus for electric power conversion includes a converter having a regulating circuit and switching network. The regulating circuit has magnetic storage elements, and switches connected to the magnetic storage elements and controllable to switch between switching configurations. The regulating circuit maintains an average DC current through a magnetic storage element. The switching network includes charge storage elements connected to switches that are controllable to switch between plural switch configurations. In one configuration, the switches forms an arrangement of charge storage elements in which at least one charge storage element is charged using the magnetic storage element through the network input or output port. In another, the switches form an arrangement of charge storage elements in which an element discharges using the magnetic storage element through one of the input port and output port of the switching network.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: November 8, 2022
    Assignee: pSemi Corporation
    Inventor: David M. Giuliano
  • Patent number: 11482889
    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.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: October 25, 2022
    Assignee: INTEGRATED DEVICE TECHNOLOGY, INC.
    Inventors: Rui Liu, Jiangjian Huang
  • Patent number: 11476843
    Abstract: The disclosure provides a bias voltage calibration circuit adapted for a signal receiving device. The bias voltage calibration circuit includes a reference voltage generator, a voltage-current converter, and a bias current generator. The reference voltage generator receives a voltage adjustment signal, and adjusts a voltage value of a generated reference voltage according to the voltage adjustment signal. The voltage-current converter is coupled to the reference voltage generator, and converts the reference voltage to generate a reference current. The bias current generator generates a plurality of bias currents according to the reference current, and provides the bias current to an equalization circuit of the signal receiving device in a calibration mode.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: October 18, 2022
    Assignee: ALi Corporation
    Inventors: Yen Liang Lin, Ming-Ta Lee
  • Patent number: 11451148
    Abstract: A voltage-regulating circuit comprising: a voltage regulator, a switch, a first comparing circuit for comparing the amplitude deviation between the input voltage and the output voltage to a first threshold, a second comparing circuit for comparing the amplitude of the output voltage to a second threshold, and a control circuit for commanding the switch to open or close depending on the comparisons made by the first comparing circuit and by the second comparing circuit. Also disclosed is a regulated power-supply module comprising such a voltage-regulating circuit.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: September 20, 2022
    Assignee: Schneider Electric Industries SAS
    Inventor: Jérôme Brenguier
  • Patent number: 11404966
    Abstract: The present disclosure provides an isolated multi-phase DC/DC converter with a reduced quantity of blocking capacitors. In one aspect, the converter includes a multi-phase transformer having a primary circuit and a secondary circuit magnetically coupled to the primary circuit, the primary circuit having a first quantity of terminals, and the secondary circuit having a second quantity of terminals; a third quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the primary circuit; and a fourth quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the secondary circuit. The third quantity is one less than the first quantity. The fourth quantity is one less than the second quantity.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: August 2, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Jong Woo Kim, Peter Mantovanelli Barbosa
  • Patent number: 11385266
    Abstract: The present invention provides a current detection circuit, semiconductor device, and a semiconductor system suitable for improving a current sensing accuracy. According to one embodiment, the current detection circuit 12 comprises a sense transistor Tr11 through which a first sense current proportional to the current flowing through the drive transistor MN1 flows, an operational amplifier AMP1 for amplifying the potential difference of the voltage of the external output terminal OUT and the source voltage of the sense transistor Tr11 for outputting the first sense current, a transistor Tr12 provided in series with the sense transistor Tr11 and to which the output voltage of the operational amplifier AMP1 is applied to the gate, and a switch SW3 provided between the external output terminal OUT and the source of the sense transistor Tr11 and turned on when the drive transistor MN1 is turned off.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: July 12, 2022
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Keisuke Kimura, Hideyuki Tajima, Wataru Saito
  • Patent number: 11387731
    Abstract: A converter system includes a first switch, a sample-and-hold unit configured to provide a comparison signal based on a feedback signal when the first switch is switched off, and hold the comparison signal independent from the feedback signal when the first switch is switched on, and a pulse-width-modulation (PWM) generator, coupled between the sample-and-hold unit and first switch, configured to generate a PWM signal based on the comparison signal, wherein the first switch is configured to be switched on and off based on the PWM signal.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: July 12, 2022
    Assignee: Texas Instruments Incorporated
    Inventors: Weibing Jing, Liang Zhang, Dan Li, Qi Yang
  • Patent number: 11387823
    Abstract: A PFM control circuit includes a switching circuit, a slope-decision circuit, a flip-flop, a first and a second comparison circuits. The first comparison circuit outputs a first signal according to an output voltage of a power conversion circuit. The switching circuit outputs a switching signal according to an output current of the power conversion circuit. The slope-decision circuit outputs a slope modulation voltage, and determines a slope modulation voltage with a first or a second slope according to the switching signal. The second comparison circuit outputs the second signal according to the slope modulation voltage. The flip-flop outputs a control signal to the power conversion circuit according to the first and the second signals. When the slope modulation voltage has the first or the second slope, the control signal has a first or a second frequency accordingly. The first frequency is higher than the second frequency.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: July 12, 2022
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Shih-Cheng Wang, Chun-Yu Luo, Shih-Chieh Chen, Liang-Hui Li, Chun-Fu Chang
  • Patent number: 11381223
    Abstract: A power supply system includes: a first power storage device; a second power storage device having a lower voltage than the first power storage device; a DC-DC converter including a choke coil, a first switching element, a diode connected in parallel with the first switching element, and a second switching element; a semiconductor relay configured to switch a connection state between a second end of the choke coil and the second power storage device; and a controller configured to perform PWM control of the first switching element and the second switching element to control ON and OFF of the semiconductor relay. When an ON time of the second switching element is controlled to become zero and a current flowing out from the second power storage device exceeds a first reference current, the controller reduces a duty ratio of an ON time of the first switching element.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Usami, Takuya Yamamoto
  • Patent number: 11362579
    Abstract: A switching power converter circuit may include output voltage overshoot mitigation circuitry that can modify operation of the converter responsive to an overvoltage condition by switching from a pulse width modulation (PWM) mode to a pulse frequency modulation (PFM) mode. A clamp may be provided to clamp a control voltage or a compensating capacitor voltage of the main output voltage control loop (e.g., a PWM control loop) to a control voltage of the PFM loop. An output pull down circuit may be provided to temporarily apply a load to the converter output.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: June 14, 2022
    Assignee: Apple Inc.
    Inventors: Stephen Hrinya, Di Zhao
  • Patent number: 11342845
    Abstract: Various embodiments include a method for operating a bidirectional voltage converter with an input-side half-bridge, an output-side half-bridge, and a bridge branch having a bridge inductance, comprising: determining an actual mean bridge current value flowing through the bridge branch during a respective subsequent switching cycle T1 of the transistor switches in a respective current switching cycle T0; determining switch-on time points and switch-on durations of the respective transistor switches for the respective subsequent switching cycle T1; and switching on the respective transistor switches at the respective ascertained switch-on time points and for the respective ascertained switch-on durations in the respective subsequent switching cycle T1.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: May 24, 2022
    Assignee: VITESCO TECHNOLOGIES GERMANY GMBH
    Inventor: Martin Ehrmann
  • Patent number: 11336182
    Abstract: A bidirectional charging and discharging circuit is coupled between a voltage source and a capacitive load and configured to drive the capacitive load. The bidirectional charging and discharging circuit includes a first switch, comprising a first terminal coupled to the voltage source; a second switch, comprising a first terminal coupled to a second terminal of the first switch, and a second terminal coupled to a ground; an inductor, comprising a first terminal coupled to the second terminal of the first switch and the first terminal of the second switch; a third switch, comprising a first terminal coupled to a second terminal of the inductor, and a second terminal coupled to a first terminal of the capacitive load; and a fourth switch, comprising a first terminal coupled to the second terminal of the inductor and the first terminal of the third switch, and a second terminal coupled to a ground.
    Type: Grant
    Filed: June 20, 2021
    Date of Patent: May 17, 2022
    Assignee: xMEMS Labs, Inc.
    Inventors: Jing-Meng Liu, Jemm Yue Liang
  • Patent number: 11309691
    Abstract: A bus bar arrangement including two or more bus bars arranged for conducting currents, wherein the two or more busbars are arranged parallel and at a distance from each other, the arrangement including a magnetic structure which is arranged between two bus bars which are next to each other.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: April 19, 2022
    Assignee: ABB Schweiz AG
    Inventors: Jesse Kokkonen, Henri Kinnunen
  • Patent number: 11283355
    Abstract: A simulation current signal generation circuit applied to a power conversion circuit is disclosed. The power conversion circuit has an output terminal and includes an output stage, a PWM circuit and an impedance component. One terminal of impedance component is coupled to the output terminal. The generation circuit includes a first current signal circuit, a second current signal circuit and a switching circuit. The first current signal circuit, coupled to another terminal of impedance component, provides a first current signal. The second current signal circuit, coupled to the output stage, senses a current of a power switch in the output stage to provide a second current signal. The switching circuit, coupled to the first current signal circuit, second current signal circuit and PWM circuit respectively, selectively outputs the first current signal or second current signal according to a PWM signal provided by the PWM circuit.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: March 22, 2022
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventor: Bo-Zhou Ke
  • Patent number: 11256275
    Abstract: A power supply adjusting system, method and apparatus, a chip, and an electronic device. The system includes: a power supply, a power storage circuit and a control circuit the control circuit is connected to the power supply and the load when in use; and the control circuit is configured to obtain a workload change condition of the load and to control, in a case where the workload change condition is that the load increases, the power supply to decrease the supply voltage so that the power storage circuit outputs power to supply power to the load.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: February 22, 2022
    Assignee: CHENGDU HAIGUANG INTEGRATED CIRCUIT DESIGN CO., LTD.
    Inventors: Yuqian Cedric Wong, Shuiyin Yao, Hongchang Liang, Zhimin Tang
  • Patent number: 11250830
    Abstract: Circuits, devices and methods related to mode-switching of amplifiers. In some embodiments, an audio controller can include a mode state engine configured to receive an enable signal and generate a control signal for controlling a mode transition of an amplifier between a current source mode and a voltage source mode, with the mode transition of the amplifier resulting in an artifact sound. The audio controller can further include an enable component configured to provide the enable signal to the mode state engine based on a masking sound in an audio signal, such that the artifact sound is substantially masked by the masking sound during the mode transition of the amplifier.
    Type: Grant
    Filed: July 11, 2020
    Date of Patent: February 15, 2022
    Assignee: Skyworks Solutions, Inc.
    Inventor: Michael Jon Wurtz
  • Patent number: 11239752
    Abstract: A method may include monitoring an input power supply, monitoring an inductance of an inductor of a boost converter, monitoring one or more other characteristics of the boost converter, and calculating a target peak inductor current based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a target average current of the inductor during a switching cycle of the boost converter. A method may include monitoring an input power supply voltage, monitoring an inductance of an inductor of a boost converter, monitoring one or more other characteristics of the boost converter, and calculating an average current of the inductor during a switching cycle of the boost converter based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a peak inductor current of the inductor.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: February 1, 2022
    Assignee: Cirrus Logic, Inc.
    Inventors: Jeffrey Allen May, Eric J. King, Ku He, Sarang Vadnerkar, Ullas Pazhayaveetil, Theodore M. Burk
  • Patent number: 11228257
    Abstract: Existing modular multi-level converters can be bulky because their submodule capacitors are comparatively large. To address this shortcoming in the state of the art, the present disclosure provides electronic power circuits and their use in power converters and in modular multi-level converters. The disclosed power circuits include connection terminals connected to electrically controllable bidirectional two-quadrant switches and to capacitors, as well as inductors that are magnetically coupled and operate to equalize voltages of the capacitors.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: January 18, 2022
    Inventor: Stig Munk-Nielsen
  • Patent number: 11218074
    Abstract: This present invention is an invented high-performance error amplifier concept and unique circuitry architecture for controller of switching mode power supply (SMPS). The invented error amplifier comprises a front-end buffer circuit, an embedded differential amplifier, an N-MOSFET based output driving stage and coupled passive RC network. The embedded error amplifier is constructed with two differential pair inputs and an output amplification stage. N-MOSFET output stage coupled to the output of the embedded differential amplifier enhances the load driving capability of proposed error amplifier. The clamp voltage can be configured by another passive network and an output stage with two current sources. This invention allows user to arbitrarily configure the clamp voltage level regardless of the error amplifier's bias voltage. In addition, the highly accurate clamp voltage level can be achieved without temperature drift issue.
    Type: Grant
    Filed: May 3, 2020
    Date of Patent: January 4, 2022
    Inventor: Wangke Tao
  • Patent number: 11201553
    Abstract: A control method and a control circuit for a switching power supply circuit and the switching power supply circuit. The switching power supply circuit includes a main switching transistor, a synchronous rectifier and an inductive element. When a switching signal indicates that the synchronous rectifier is turned from on to off, and the main switching transistor is turned from off to on, a gate voltage of the synchronous rectifier is pulled down to be lower than a threshold voltage of the synchronous rectifier and higher than a zero voltage by using a resistor-capacitor delay effect and timing is started. When a gate voltage of the main switching transistor is detected to rise to a first voltage or the timing reaches a first time, the gate voltage of the synchronous rectifier is pulled down to the zero voltage.
    Type: Grant
    Filed: December 1, 2019
    Date of Patent: December 14, 2021
    Assignee: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.
    Inventors: Xunjin Dou, Aimin Xu, Xunwei Zhou
  • Patent number: 11201493
    Abstract: A power converter and methods with an input terminal, a capacitor, a first output terminal, a second output terminal, an output switch between the first output terminal and the second output terminal, and an inductor are presented. A first terminal of the inductor is connected to the first output terminal. An input switch is connected between the input terminal and a first terminal of the capacitor. A first capacitive charging switch is connected between the first terminal of the capacitor and the second output terminal. A second capacitive charging switch is connected between the second output terminal and a second terminal of the capacitor. A ground switch is connected between the second terminal of the capacitor and a reference potential. The power converter can convert electrical power into electrical power for powering an external device d or into electrical power for charging an external energy storage device.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: December 14, 2021
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Sabin Eftimie
  • Patent number: 11196339
    Abstract: A switching converter having a voltage input, a voltage output and a transistor connected between the voltage input and the voltage output, the switching converter including a control circuit comprising: a gate driver having an input, a first voltage supply input, a second voltage supply input and an output operable to be connected to a control terminal of the transistor; a bootstrap capacitor connected between the first voltage supply input and the second voltage supply input; and a charge pump having an input operable to be connected to the voltage input and an output connected to the first voltage supply input.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: December 7, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Eduardas Jodka, Julian Becker Ferreira, Christian Harder, Florian Schimkat