Patents Examined by Nguyen Tran
  • Patent number: 10324481
    Abstract: A low-dropout voltage regulator (2) comprises: a differential amplifier portion (4) including a first amplifier input connected to a reference voltage (16), a second amplifier input, and a differential output which is determined by a difference between the reference voltage and a voltage on the second amplifier input; an output portion (10) arranged to provide a regulator output voltage (62) which is controlled by the differential output of the amplifier portion, the second amplifier input being connected to or derived from (70) the regulator output voltage; and a biasing portion (8) arranged to measure an external load current and to provide a biasing current to the differential amplifier portion which depends on the load current.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: June 18, 2019
    Assignee: Nordic Semiconductor ASA
    Inventor: Hans Ola Dahl
  • Patent number: 10326364
    Abstract: A DC-DC converter including digital circuitry for determining load current supplied to a load. In some embodiments the digital circuitry determines the load current differently based on whether the DC-DC converter is operating in pulse frequency modulation mode or pulse width modulation mode. In some embodiments the DC-DC converter includes circuitry for determining if a short circuit or over current condition exists.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: June 18, 2019
    Assignee: Chaoyang Semiconductor Jiangyin Technology Co., Ltd.
    Inventors: Hassan Ihs, Jason Rau
  • Patent number: 10320297
    Abstract: A circuit to detect body diode conduction in a switch with an adaptive dead-time scheme for a switched mode power supply. The body-diode of a first switch entering conduction means the first switch is OFF and a second switch can be turned ON. The body diode conduction detector circuit (BDCD) uses relative analysis of the switching node voltage (VLX). The BDCD circuit acts as a voltage follower in a first phase and a comparator in a second phase. The BDCD circuit tracks VLX during the first phase and samples and holds VLX+VREF=VHOLD at the end of the first phase. During the second phase, the BDCD circuit compares VLX+VHOLD to VREF. When the body-diode of the first switch enters conduction VLX will become negative and VLX+VHOLD will drop below VREF, and toggle the logic level output of the comparator.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: June 11, 2019
    Assignee: Infineon Technologies AG
    Inventors: Vratislav Michal, Matteo Agostinelli, Volha Kharko Subotskaya
  • Patent number: 10317921
    Abstract: A power supply is disclosed. The power supply includes a first switch and a second switch. The gate of the first switch is coupled to the gate of the second switch. The power supply further includes a cutoff switch coupled between the first switch and an input voltage port. A comparator is included for comparing a voltage at a feedback port with a fixed reference voltage. The comparator opens the cutoff switch when the voltage at the feedback port is lower than the fixed reference voltage.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: June 11, 2019
    Assignee: NXP USA, Inc.
    Inventor: Xianghua Shen
  • Patent number: 10320248
    Abstract: A rotor with permanent magnets for a rotary electric machine including a plurality of alternating north poles and south poles and made up of a plurality of permanent magnets arranged in first recesses extending axially and distributed regularly between a circumferential portion and a central portion of the magnetic mass of the rotor such as to define a plurality of circumferential polar sections, the first recesses being separated by central tabs with a thickness E, the permanent magnets having a polygonal radial section that comprises a substantially rectangular portion next to the circumferential portion adjacent to a substantially trapezoidal portion next to the central portion. The rotor having a ratio R0 (h/E) of a first height h of the trapezoidal portion to the thickness E of a central tab is predetermined such as to maximize the efficiency of the electric machine.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: June 11, 2019
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Lilya Bouarroudj, Virginie Leroy, Nam-Gook Kim
  • Patent number: 10320279
    Abstract: An example switched-mode power supply includes an input for receiving an input voltage from a voltage source, an output for providing an output voltage to a load, and a transformer having a primary winding, a secondary winding, and a conductive shield disposed between the primary winding and the secondary winding. The power supply also includes a neutralization signal generator circuit coupled to the conductive shield to apply a neutralization signal to the conductive shield to reduce a common mode noise between the primary winding and the secondary winding of the transformer. The neutralization signal has an adjustable amplitude and/or phase. Other example power supplies and methods are also disclosed.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: June 11, 2019
    Assignee: Astec International Limited
    Inventors: Wing Ling Cheng, Yuk Man Shing
  • Patent number: 10320304
    Abstract: The present invention provides a power converter, a secondary side controller, and a short circuit determination method for a current sensing resistor of the power converter. The power converter is controlled by a power switch to convert an input voltage to an output voltage, and provide an output current to an output terminal. The power converter senses the output current by a current sensing resistor to generate first information which relates to the output current. The power converter generates second information according to an ON time, an OFF time or a switching period of the power switch, or according to an energy-releasing period for transmitting energy to the output terminal, wherein the second information indicates whether there is a substantial amount of energy transmitted to the output terminal. By checking whether the first information and the second information are contradictory to each other, a malfunction can be found.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: June 11, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Yu-Kai Chen, Kuang-Fu Chang
  • Patent number: 10312812
    Abstract: A wide-range positive-negative adjustable high-voltage DC power supply includes the following components: a high-voltage generator, a negative high-voltage terminal, and a positive high-voltage terminal; a first driving circuit, a first voltage regulating unit, a current detection and amplification circuit, a second driving circuit and a second voltage regulating unit that are connected in turn; and an adjustable high-voltage output terminal; as well as an instruction input terminal, an instruction voltage circuit and an error amplifier that are connected in turn, and a voltage feedback circuit.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: June 4, 2019
    Assignee: Huizhou Sanhua Industrial Co., Ltd.
    Inventors: Jianming Li, Zheng Liu, Jianping Sun, Chengshun Zhang
  • Patent number: 10305387
    Abstract: A single active bridge converter is provided. The single active bridge converter includes a transformer including a primary winding and a secondary winding, a primary side circuit electrically coupled to the primary winding and including an H bridge circuit, and a secondary side circuit electrically coupled to the secondary winding, the secondary side circuit including a switch configured to selectively short the transformer secondary winding.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: May 28, 2019
    Assignee: ABB Schweiz AG
    Inventors: Said Farouk Said El-Barbari, Simon Herbert Schramm
  • Patent number: 10305385
    Abstract: One example includes an interleaved resonant converter circuit. The circuit includes a plurality of resonant converter circuits that are each coupled to an output node and are configured to collectively generate an output voltage on the output node in response to a respective plurality of sets of switching signals at each of a respective plurality of phases. The circuit also includes a switching controller configured to generate each of the plurality of sets of switching signals having a variable duty-cycle relative to each other at each of the plurality of phases.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: May 28, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Hrishikesh Ratnakar Nene
  • Patent number: 10296034
    Abstract: A negative power supply control circuit which controls a negative voltage regulator circuit based on a positive voltage control signal, the negative power supply control circuit including: a control signal input terminal a negative voltage input terminal; a negative voltage input control signal output terminal; a voltage current conversation circuit; a first current source; and a first clamp circuit, wherein the first clamp circuit clamps a voltage at a first intermediate point between the first clamp circuit and the first current source by limiting a current flowing in the first clamp circuit according to the voltage at the first intermediate point in a period when a current flows in the voltage current conversation circuit, and the negative voltage controls signal is generated based on a voltage or a current in a current path through the voltage current conversation circuit, the first clamp circuit and the first current source.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: May 21, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Kohei Sakurai, Yoichi Takano
  • Patent number: 10291117
    Abstract: A multi-phase power converter is described, which is configured to convert power between an input port and an output port. The multi-phase power converter comprises a basic switched converter comprising a basic inductor, wherein the basic switched converter is configured to convert power between the input port and the output port. Furthermore, the multi-phase power converter comprises an auxiliary switched converter comprising an auxiliary inductor, wherein the auxiliary switched converter is configured to convert power between the input port and an auxiliary port. In addition, the multi-phase power converter comprises a set of configuration switches configured to couple the auxiliary port to the output port, or to arrange the auxiliary inductor and the basic inductor in series.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 14, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Holger Petersen
  • Patent number: 10291142
    Abstract: A converter arrangement with at least two single LLC converters, a pulse generator per single LLC converter wherein each pulse generator is configured to supply switching pulses to one single LLC converter and an output controller configured to use switching frequency control and/or phase-shift control to control the pulse generators comprises a load balancing control for overcoming unbalanced loading of the converter arrangement.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: May 14, 2019
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Heiko Figge, Frank Schafmeister, Tobias Grote
  • Patent number: 10291129
    Abstract: In operation of a flybuck converter, a first output capacitor is charged and, after this charging, charge is transferred from the first output capacitor to a second output capacitor. The charge transferring includes closing a switch to establish a first current path through which the first output capacitor discharges current that induces, in a second current path, current that charges the second output capacitor. While the switch is closed during the charge transfer, a current limit condition in the switch is detected. In response to detection of the current limit condition, the switch is opened, and is thereafter closed again before attempting to charge the first output capacitor again, thereby to resume transferring charge from the first output capacitor to the second output capacitor.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: May 14, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Vijay Choudhary, Jose Vidal, Jr.
  • Patent number: 10291113
    Abstract: A flyback power converter includes a transformer having a primary winding receiving an input power, a secondary winding generating an output power, and an auxiliary winding generating an auxiliary voltage and providing a supply voltage, a primary side switch controlling the primary winding, a start-up switch coupled to the input voltage and the supply voltage, and a primary side controller supplied by the supply voltage. The primary side controller includes a shared pin coupled to a control terminal of the start-up switch, a start-up circuit for controlling the start-up switch to be conductive through the shared pin when the supply voltage is lower than a threshold, and a signal processing circuit receiving an auxiliary signal related to the auxiliary voltage through the shared pin and operating the flyback power converter accordingly, wherein the shared pin, besides providing a function of controlling the start-up switch, provides another function.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: May 14, 2019
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Kun-Yu Lin
  • Patent number: 10291138
    Abstract: Disclosed examples include isolated dual active bridge (DAB) DC to DC converters with first and second bridge circuits, a transformer with a sense coil, and a secondary side control circuit to provide secondary side switching control signals to regulate an output voltage or current signal by controlling a phase shift angle between switching transitions of the secondary side switching control signals and switching transitions of a secondary side clock signal, where the secondary side control circuit includes a clock recovery circuit to synchronize the secondary side clock signal to transitions in a sense coil voltage signal of the sense coil.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: May 14, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pierluigi Albertini, Maurizio Granato, Giacomo Calabrese, Roberto Giampiero Massolini, Joyce Marie Mullenix, Giovanni Frattini
  • Patent number: 10291131
    Abstract: System and method for regulating an output of a power conversion system. An example system controller includes a signal generator and a modulation and drive component. The signal generator is configured to receive at least a first signal indicating a magnitude of an input voltage received by a primary winding of a power conversion system and receive a second signal indicating a magnitude of a primary current flowing through the primary winding, and generate a third signal. The modulation and drive component is configured to receive at least the third signal, generate a drive signal based on at least information associated with the third signal, and output the drive signal to a switch to affect the primary current.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: May 14, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Weihua Wang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 10284069
    Abstract: A voltage conversion device can selectively switch between and perform voltage control and current control of a voltage conversion unit in a suitable manner in which output characteristics of a power source are reflected. A control unit (10) of the voltage conversion device (1) selectively switches the control mode of the voltage conversion unit (3) to a current control mode or a voltage control mode on the basis of current-voltage characteristics of the power source (2) and performs a control process of each control mode. The power source (2) has current-voltage characteristics such that the output voltage changes according to the output current and such that a rate of change of the output voltage with respect to a change of the output current changes according to the output current.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 7, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventor: Ryota Kitamoto
  • Patent number: 10277026
    Abstract: A power converter connected between a direct current power supply and a load, the power converter including a switching unit energizing the load based on inputted control signal, a voltage detector detecting a voltage of the direct current power supply, and a protection operation portion detecting a steep elevation of the voltage and performing protection operation to stop a switching operation by the switching unit, wherein the protection operation portion includes an addition circuit adding a predetermined voltage to the voltage detected by the voltage detector and a delay time generator connected to an output of the addition circuit, and wherein the protection operation is performed when a difference between the voltage detected by the voltage detector and an output voltage of the delay time generator reaches a certain value.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: April 30, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiroki Murayama, Naoto Shinohara, Daisuke Yamagishi
  • Patent number: 10270343
    Abstract: A multiphase power supply includes several constant ON-time (COT) DC-DC converter integrated circuits (ICs), with each COT DC-DC converter IC providing an output voltage of a phase of the multiphase power supply. The COT DC-DC converter ICs are sequentially turned ON one after another in interleaved fashion. A COT DC-DC converter IC receives a control signal at a take pin and, in response, turns ON its output switch. The COT DC-DC converter IC generates another control signal at a pass pin. The next COT DC-DC converter IC turns ON its output switch in response to receiving the other control signal from the previous COT DC-DC converter IC.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 23, 2019
    Assignee: Monolithic Power Systems, Inc.
    Inventors: James Nguyen, Yan Dong, Jinghai Zhou, Rohan Samsi