With Additional Series Regulator Patents (Class 323/224)
  • Patent number: 10958171
    Abstract: A DC-DC converter and a corresponding method for maintaining an output voltage of the DC-DC converter, wherein the DC-DC converter is configured to operate in a discontinuous conduction mode, within a predetermined voltage range. The method comprises adjusting a duty cycle of the DC-DC converter based on the output voltage to maintain the output voltage within a predetermined voltage range; wherein the duty cycle of the DC-DC converter is adjusted by switching between a first switching frequency to a second switching frequency, and the first switching frequency and the second switching frequency are selected such that the first switching frequency and the second switching frequency fall outside of at least one predefined disallowed frequency band.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: March 23, 2021
    Assignee: Cirrus Logic, Inc.
    Inventors: Sarang Vadnerkar, Ullas Pazhayaveetil, Theodore M. Burk, Jeffrey May
  • Patent number: 10958259
    Abstract: A pulse width modulation output stage incorporates a half bridge output stage, a gate control circuit, a detection circuit, and a control logic. The half bridge output stage has a first transistor and a second transistor connected in series between a power supply node and a ground node. The gate control circuit outputs a pulse width modulation signal to drive the first transistor and the second transistor. The detection circuit detects whether or not a glitch occurs in one of the gate voltages of the first and second transistor so as to generate a control code. The logic circuit varies the delay time of the pulse width modulation signal based on the control code.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: March 23, 2021
    Assignee: ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC.
    Inventors: Szu-Chun Tsao, Yang-Jing Huang, Ya-Mien Hsu
  • Patent number: 10938308
    Abstract: A converter comprises a first switching element and a second switching element coupled between an input power source and an output capacitor and an inductor coupled to a common node of the first switching element and the second switching element, wherein the second switching element comprises a first diode and a first switch connected in series between a first terminal and a second terminal of the second switching element and a second diode connected between the first terminal and the second terminal of the second switching element.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: March 2, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dianbo Fu, Dong Chen
  • Patent number: 10903743
    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to adjust a transient response. An example apparatus includes a clamping circuit including a first input, a second input, a third input, and an output, wherein the first input is adapted to be coupled to a selector, a reference voltage generator including an output, wherein the output of the reference voltage generator is coupled to the second input of the clamping circuit, an error amplifying circuit including an output, wherein the output of the error amplifying circuit is coupled to the third input of the clamping circuit, and a pulse width modulator including an input, wherein the input of the pulse width modulator is coupled to the output of the clamping circuit.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: January 26, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Brian Thomas Lynch, Stefan Wlodzimierz Wiktor, Joseph Maurice Khayat
  • Patent number: 10897199
    Abstract: A buck converter is disclosed that may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: January 19, 2021
    Assignee: AMBIQ MICRO, INC.
    Inventors: Ivan Bogue, Yanning Lu
  • Patent number: 10897194
    Abstract: A power factor improvement circuit that performs, on the basis of an output voltage when a switching power-supply apparatus is in a light-load state or a no-load state, a burst operation for switching between states of the switching operation of a switching element includes: a first circuit that outputs a first voltage that corresponds to the error between a reference voltage and a voltage obtained by dividing the output voltage; and a clamp circuit that, while the burst operation is performed, clamps the lower limit of the first voltage, which decreases when the switching operation of the switching element is disabled, at a lower-limit voltage higher than the ground voltage of the power factor improvement circuit and clamps the upper limit of the first voltage, which increases when the switching operation of the switching element is performed, at an upper-limit voltage.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: January 19, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Nobuyuki Masuda, Takato Sugawara
  • Patent number: 10886833
    Abstract: A switch mode power supply controller includes a switch terminal adapted to be coupled to an inductor that drives a load, high- and low-side switches a pulse width modulation (PWM) circuit, and a current monitor circuit. The PWM circuit is coupled to a feedback terminal for receiving a feedback signal, and alternatively drives the high-side switch and the low-side switch with a duty cycle set using the feedback signal to regulate an output voltage to a desired level in a work mode, and keeps both the high-side switch and the low-side switch non-conductive in a non-work mode. The current monitor circuit provides a current monitor signal representative of a current driven from the inductor to the load, wherein the current monitor circuit forms the current monitor signal by measuring an inductor current during a work mode, and by emulating the inductor current during a non-work mode.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: January 5, 2021
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Enzhu Liang, Kaiwei Yao, Ming Gu
  • Patent number: 10886853
    Abstract: A power device driving method and a driving circuit for a switching circuit having 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 zero voltage by a body effect of a MOS transistor, and timing is started. When detecting that a gate voltage of the main switching transistor rises 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: January 5, 2021
    Assignee: JOULWATT TECHNOLOGY (HANGZHOU) CO., LTD.
    Inventors: Aimin Xu, Xunjin Dou, Xunwei Zhou
  • Patent number: 10873261
    Abstract: A controller of a switching voltage regulator estimates a load current based upon a current within the voltage regulator, a change in the output voltage of the voltage regulator, and the capacitance and/or equivalent series resistance (ESR) of an output capacitor. For sharp drops in the output voltage, the output capacitor's ESR provides a better estimate of the load current, whereas the output capacitance provides a better estimate for moderate output voltage drops. These techniques allow the voltage regulator controller to more quickly detect excessive load current, and issue an over current warning to the load with little latency. The fast response afforded by these techniques provides the load, e.g., a CPU or GPU, sufficient time to reduce its current, thereby avoiding a complete shutdown due to excessive load current.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: December 22, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Zhiqing You, Tim Ng
  • Patent number: 10858911
    Abstract: A downhole tool and a method for operating the downhole tool are disclosed. A first power signal is supplied to the downhole tool from a power source at a first frequency. A bidirectional chopper at the downhole tool chops the first power signal to generate a second power signal having a second frequency greater than the first frequency. The second power signal is used to operate the downhole tool.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: December 8, 2020
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventor: Saurabh Kulkarni
  • Patent number: 10848060
    Abstract: A switched power converter and a method are presented. The converter has a main stage with a main converter that exhibits an inductor and at least one switch to control an inductor current through the inductor. Furthermore, the switched power converter has an auxiliary stage to determine a sensed current indicative of the inductor current, and to provide or sink an auxiliary current to or from the output node, wherein the auxiliary current depends on the sensed current. In addition, the switched power converter has control circuitry to determine whether the output voltage falls below an undershoot threshold or exceeds an overshoot threshold, and to activate the auxiliary stage to provide or sink the auxiliary current, if it is determined that the output voltage falls below the undershoot threshold or exceeds the overshoot threshold.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: November 24, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Naoyuki Unno
  • Patent number: 10848062
    Abstract: A PWM signal generator to provide a supply current to an electrical load generates PWM signals at a first frequency, the PWM signals having a duty cycle. Operating the generator involves receiving a set point signal indicative of a target average value for the supply current, sensing a sensing signal indicative of a current actual value of the supply current, performing a closed-loop control of the supply current targeting the target value for the supply current via a controller such as a PID Controller which controls the duty cycle of the PWM signals generated by the PWM signal generator as a function of the offset of the sensing signal with respect to the set point signal.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: November 24, 2020
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Vanni Poletto, Diego Alagna, Nicola Errico, Marco Cignoli, Gian Battista De Agostini
  • Patent number: 10826380
    Abstract: A switching converter, a circuit for controlling the same and a method for controlling the same. A ripple signal correlated to an input voltage and an on-off state of a power switch of the switching converter is superimposed on a feedback signal of an output voltage, so as to achieve closed-loop control of the output voltage. A dynamic response speed of the switching converter in case of a change of the input voltage is improved, while a switching frequency is kept constant.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: November 3, 2020
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventor: Xiaoling Zhang
  • Patent number: 10827586
    Abstract: A load control device for controlling power delivered from a power source to an electrical load may comprise a control circuit configured to control the load regulation circuit to control the power delivered to the electrical load. The control circuit may be configured to operate in an AC mode when an input voltage is an AC voltage and in a DC mode when the input voltage is a DC voltage. The control circuit may be configured to disable the power converter in the DC mode. The control circuit may be configured to render a controllable switching circuit conductive in the AC mode, and non-conductive in the DC mode. The rectifier circuit may be configured to rectify the input voltage to generate a rectified voltage when the input voltage is an AC voltage, and to pass through the input voltage when the input voltage is a DC voltage.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: November 3, 2020
    Assignee: Lutron Technology Company LLC
    Inventors: Robert C. Newman, Jr., Stuart W. DeJonge
  • Patent number: 10804691
    Abstract: An electronic control unit (ECU) operates between first and second voltage rails and includes an amplifier circuit and a single current sense circuit coupled to carry a signal to a bus pin and to protect the bus pin from both a short to ground and a short to battery. The single current sense circuit includes a switch circuit that passes the signal to the bus pin and a forward current sensing circuit that provides a second current that is proportional to an output current at the bus pin. The forward current sensing circuit causes the second current to be substantially zero when voltage on the bus pin is above a given value. The single current sense circuit also includes a forward current protection circuit and a reverse current switching circuit that receives the second current and closes a connection to the second voltage when the second current is zero.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: October 13, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Sri Navaneethakrishnan Easwaran, Timothy Paul Duryea
  • Patent number: 10797593
    Abstract: The Kappa converter circuit, as introduced herein, can be configured for step-down (buck), step-up (boost), or buck-boost operation. The Kappa converter circuit exhibits lower electromagnetic interference (EMI) relative to other buck, boost, or buck-boost topologies, such as without additional input or output filter circuits. The Kappa converter circuit can have high power handling capability and less DCR loss, for example due to a distribution of current signals through respective inductors. The Kappa converter circuit includes isolating inductors at its input and ground reference nodes to help reduce signal bounce or signal pulsations at supply and ground reference busses, thereby further reducing EMI noise due to switching in the circuit. When the Kappa converter is configured for step-up operation, the converter exhibits no right-half-plane (RHP) zero.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: October 6, 2020
    Assignee: Analog Devices International Unlimited Company
    Inventors: Xugang Ke, Min Chen, Shuilin Tian, Keith Szolusha
  • Patent number: 10763239
    Abstract: Multi-chip wafer level packages and methods of forming the same are provided. A multi-chip wafer level package includes a first tier and a second tier. The first tier includes a first redistribution layer structure and at least one chip over the first redistribution layer structure. The second tier includes a second redistribution layer structure and at least two other chips over the second redistribution layer structure. The first tier is bonded to the second tier with the at least one chip being in physical contact with the second redistribution layer structure. The total number of connectors of the at least two other chips is greater than the total number of connectors of the at least one chip.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: September 1, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Shuo-Mao Chen, Feng-Cheng Hsu, Han-Hsiang Huang, Hsien-Wen Liu, Shin-Puu Jeng, Hsiao-Wen Lee
  • Patent number: 10756636
    Abstract: A power control device that acts as a principal controlling agent in an isolating switching power supply has a controller configured to monitor a first output detection signal commensurate with a direct-current output voltage to a load and a second output detection signal commensurate with the difference between the direct-current output voltage and its target value switch among a plurality of operating modes with varying power consumption according to the results of monitoring of the two output detection signals. The power control device may instead have a peak current switch configured to raise the peak current value of a primary current passing in an output switch on detecting a light load.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: August 25, 2020
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshinori Sato, Satoru Nate, Yuta Shiroishi
  • Patent number: 10742021
    Abstract: According to an embodiment, a power circuit supplying a voltage or a current from an output terminal to a load comprises a first circuit, a second circuit, an inductor, a fifth switching element, and a control circuit. The control circuit is configured to bring the fifth switching element into conduction when switching control on at least two of the first to fourth switching elements is to be executed according to an output to the load connected via the output terminal, and bring the fifth switching element into non-conduction after a delay time passes from a time the first to fourth switching elements have been brought into non-conduction when the first to fourth switching elements are to be brought into non-conduction.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: August 11, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Masafumi Otsuka, Yuji Yamanaka
  • Patent number: 10734902
    Abstract: A power converter includes a buck leg circuit connected between a voltage input of the power converter and ground, a boost leg circuit connected between a voltage output of the power converter and ground, an inductor connected between the buck leg circuit and the boost leg circuit, an error amplifier configured to compare the voltage output of the power converter against a reference voltage to yield a feedback signal, and a control circuit. The control circuit is configured to generate a reference buck ramp configured to be compared against the feedback signal to determine whether to operate the buck leg circuit in buck mode, and to generate a reference boost ramp by superposing a variable boost ramp portion on to the reference buck ramp, the reference boost ramp configured to be compared against the feedback signal to determine whether to operate the boost leg circuit in boost mode.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: August 4, 2020
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Jiong Ou, Scott Dearborn
  • Patent number: 10719099
    Abstract: The present disclosure shows a reconfigurable Dickson Star SC regulator that can support multiple conversion ratios by reconfiguring between various modes. The reconfigurable Dickson Star SC regulator is designed to reduce the number of redundant capacitors by reusing capacitors and switches across multiple modes of operation (across multiple conversion ratios). The present disclosure also shows a hybrid (e.g., two-stage) voltage regulator.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: July 21, 2020
    Assignee: Lion Semiconductor Inc.
    Inventors: Alberto Alessandro Angelo Puggelli, Thomas Li, Wonyoung Kim, John Crossley, Hanh-Phuc Le
  • Patent number: 10720776
    Abstract: A control apparatus controls an optimizer that steps up a DC input voltage from a solar photovoltaic power generation panel to a predetermined DC high voltage and converts the stepped-up DC voltage into a grid connection voltage, and includes a microprocessor; a sensor group; and a MOS driver group. The microprocessor includes: a control logic unit; a maximum power point tracking control unit; a PWM control unit; a PFM control unit; an I/O port; a timer control unit; and an initial measurement unit. The sensor group includes a solar photovoltaic panel voltage detection circuit; a solar photovoltaic panel current detection circuit; an optimizer output voltage detection circuit; and an optimizer output current detection unit. Thus, even when the solar photovoltaic power generation panel is at a low power in a low output state, stable operation can be continued, and transistors can be protected from a surge voltage.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: July 21, 2020
    Assignees: MERSINTEL, CO., LTD., CLEAN ENERGY FACTORY CO., LTD.
    Inventor: Hiroyuki Nishimura
  • Patent number: 10719109
    Abstract: Described is an apparatus which comprises: a power supply node; a plurality of inductors inductively coupled with one another, wherein at least one inductor of the plurality is electrically coupled to the power supply node; a plurality of loads; and a plurality of capacitors coupled to the plurality of inductors, respectively, and also coupled to the plurality of loads, respectively.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: July 21, 2020
    Assignee: Intel Corporation
    Inventors: Amit K. Jain, Chin Lee Kuan, Sameer Shekhar
  • Patent number: 10707761
    Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. During a charge cycle, the power converter circuit may generate a reference ramp signal that has an initial voltage level greater than that of the switch node. The power converter may also generate a sense ramp signal using the voltage level of the switch node, and halt the charge cycle using results of a comparison of the respective voltage levels of the reference ramp signal and the sense ramp signal.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: July 7, 2020
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Andrea Acquas, Nicola Rasera
  • Patent number: 10707842
    Abstract: An analog signal-to-pulse width modulation (PWM) converter includes a ramp generator generating a ramp signal and a comparator circuit comparing the ramp signal to a first voltage, a second voltage, and an analog input signal. A duty cycle calculation circuit generates a first control signal to the ramp generator to generate the ramp signal. Based on signals from the comparator circuit, the duty cycle calculation circuit calculates the ratio of the time it takes for the ramp signal to exceed the analog input signal from when the ramp signal exceeds the first voltage to the time it takes for the ramp signal to exceed the second voltage from when the ramp signal exceeds the first voltage. A PWM signal generator generates a PWM output signal based on the ratio calculated by the duty cycle calculation circuit.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 7, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Paul Vulpoiu, Rakesh Raja, Sudhir Nagaraj
  • Patent number: 10707744
    Abstract: The present invention concerns a device for controlling the operation of a power module composed of switches, each switch being composed of a plurality of power dies connected in parallel, characterized in that the device comprises, for each power die of the power module: —a temperature sensor to sense the temperature of the power die, —a current sensor to sense the current going through the power die, —a gate interrupt circuit to interrupt the signal provided to the power die if the sensed current is higher than a predetermined current threshold, —a controller to reduce the conducting time of the die if the sensed temperature of the power die is higher than the average die temperature across the power dies of at least one switch.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: July 7, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Jeffrey Ewanchuk, Stefan Mollov
  • Patent number: 10700589
    Abstract: In accordance with the concepts, circuits and techniques described herein, a converter circuit is provided having multiple half-bridge switching cells that can be selectively controlled using one or more switching patterns to convert a source voltage to a desired output voltage over wide voltage and power ranges while maintaining zero-voltage switching and/or zero-current switching. The converter circuit includes capacitive elements disposed between center switching nodes of the half-bridge switching cells and fixed potentials and a magnetic energy storage element coupling the center switching nodes of first and second half-bridge switching cells. A controller is coupled to the converter circuit to monitor, control and apply one or more switching patterns the half-bridge switching cells such that components of the half-bridge switching cells are switched having a minimal or zero voltage (or current) across them.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: June 30, 2020
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: David J. Perreault, Alex J. Hanson, Seungbum Lim, Rachel S. Yang
  • Patent number: 10700604
    Abstract: Devices, methods and systems provide improved performance for voltage converters and enable more efficient operations by reducing energy loss in a head switch of the voltage converter. These improvements are achieved in-part by reducing one or both of an ohmic conduction loss and a switching loss of the head switch. One example floating head switch includes an n-type metal oxide semiconductor (NMOS) transistor, a capacitor, one or more drivers and an active low switch. The capacitor ends are connected to the supply voltages of the drivers and the active low switch is coupled to, and controlled by, the output of the one or more drivers and turns on or off in response to a change in the input voltage.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: June 30, 2020
    Assignee: ATLAZO, INC.
    Inventor: Hajir Hedayati
  • Patent number: 10693365
    Abstract: In a power conversion circuit in which a grounded capacitor is connected to a main circuit that converts power through operation of a semiconductor switching device, a control IC that supplies a drive signal to the semiconductor switching device generates a cancellation voltage for canceling out a conducted emission that develops across terminals of the grounded capacitor as a result of the operation of the semiconductor switching device by using the drive signal (gate signal) to control a charge/discharge current of a compensation capacitor in a compensation circuit that is externally connected to the main circuit.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: June 23, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 10680522
    Abstract: A control device serves as an agent that controls a switching regulator including an output switch and a synchronous rectification switch. The control device includes: a summator generating a sum sense signal by adding up a first sense signal commensurate with the current passing in the output switch and a second sense signal commensurate with the current passing in the synchronous rectification switch; a smoother generating a smoothed sense signal by smoothing the sum sense signal; and a switch driver driving the output switch and the synchronous rectification switch complementarily through current mode control based on the smoothed sense signal.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: June 9, 2020
    Assignee: Rohm Co., Ltd.
    Inventor: Yosuke Fukumoto
  • Patent number: 10673432
    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to control parallel transistors. An example system includes a first transistor coupled in parallel to a second transistor, a pulse width modulation generator coupled to the first transistor. The pulse width modulation generator is to generate a first signal. The example system further includes a first switch timing controller coupled to the pulse width modulation generator. The first switch timing controller is to compare a first peak current of the first transistor with a second peak current and generate a second signal based on the comparison of the first peak current and the second peak current. The example system further includes a gate driver coupled to the first switch timing controller and the gate driver is to control the first transistor in response to the second signal.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: June 2, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Cetin Kaya
  • Patent number: 10673339
    Abstract: Hysteretic control for power converters. In an example arrangement, an apparatus includes a converter for converting an input voltage to an output voltage including a transformer; at least one primary side driver switch coupled to supply current from an input voltage terminal to the primary side of the transformer; at least one inductor coupled between the secondary side of the transformer and the output voltage terminal; at least one secondary side switch coupled between the inductor and a ground potential; and a hysteretic controller coupled to supply a first on-time signal to the at least one primary side switch and a second on-time signal to the at least one secondary side switch, the hysteretic controller configured for sensing the output voltage and having at least one current input coupled for sensing current flowing in the inductor and generating primary side driver switch on-time pulses to control the output voltage.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: June 2, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Michael D. Seeman
  • Patent number: 10649480
    Abstract: A voltage regulator is arranged to receive an input voltage (Vin) and produce a regulated output voltage (Vout) and comprises: a current source transistor (Msource) and a current sink transistor (Msink) arranged to provide the output voltage at a node therebetween; a first error amplifier; and a second error amplifier. The first error amplifier is arranged to apply a first control voltage to the gate terminal of the current source transistor, wherein the first control voltage is dependent on the difference between the feedback voltage (Vfb) and the reference voltage (Vref). The second error amplifier arranged in parallel to the first error amplifier, the second error amplifier being arranged to apply a second control voltage to the gate terminal of the current sink transistor, wherein the second control voltage is dependent on the difference between the feedback voltage and the reference voltage. The feedback voltage is derived from the output voltage.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 12, 2020
    Assignee: Nordic Semiconductor ASA
    Inventor: Francesco Pini
  • Patent number: 10630185
    Abstract: A power delivery device and a control method are shown. The power delivery device includes a power factor correction circuit, and an output voltage control circuit. The power factor correction circuit is configured to increase a power factor of the power delivery device. The output voltage control circuit is configured to control an output voltage of the power delivery device, and detect an output current of the power delivery device. The power factor correction circuit is uncontrolled by the output voltage control circuit in response to a first load state of the power delivery device, and is controlled by the output voltage control circuit in response to a second load state of the power delivery device.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: April 21, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Kun-Chi Lin, Chung-Chieh Cheng, Kun-Jang Kuo, Tien-He Chen, Shou-Chieh Lin
  • Patent number: 10615693
    Abstract: A system comprises a DC-to-DC voltage converter, the DC-to-DC voltage converter comprising: a high-side FET comprising a gate, a source, and a drain; a node coupled to the source of the high-side FET; a low-side FET comprising a gate, a source, and a drain coupled to the node; and a controller coupled to the gate of the high-side FET to switch on and off the high-side FET, and coupled to the gate of the low-side FET to switch on and off the low-side FET, the controller configured to switch on the low-side FET for a time interval before switching on the high-side FET and to switch off the low-side FET before switching on the high-side FET.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: April 7, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Syed Wasif Mehdi, Stefan Herzer, Antonio Priego
  • Patent number: 10594212
    Abstract: A method for pulse-frequency modulation efficiency optimization, for fast load transient response, in a DC-DC switching converter, is disclosed. The method provides for dynamic blanking, of the under voltage comparator, while maintaining the maximum switching frequency in pulse-frequency mode. The optimization becomes more relevant with the reduction of the regulated output voltage. A further object of the disclosure is to increase the power conversion efficiency of pulse-frequency mode (PFM) by increasing the Load Bursting Point (LBP), maintaining compatibility with the fast load transient response of current DC-DC switching converter architectures.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: March 17, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Nuno Miguel Nogueira Dias
  • Patent number: 10587196
    Abstract: A constant on-time controller has a voltage divider, a current ripple extractor, a one-shot on-timer, a comparator and a flip flop. The voltage divider generates a feedback voltage according to a regulator output voltage. The current ripple extractor senses a current in an energy storage inductor of a buck regulator flowing through flowing through an output capacitor's ESR, and generates an extracted ripple current having no DC component accordingly. The one-shot on-timer outputs a constant-on time control signal according to a buck regulator input voltage and the regulator output voltage. The modulation circuit outputs a modulation signal according to a reference voltage signal, the feedback voltage and the extracted ripple current. The flip flop generates a control signal to the buck regulator according to the modulation signal and the constant-on time control signal. An off-time of the buck regulator is determined according to the modulation signal.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: March 10, 2020
    Assignee: ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC.
    Inventor: I-Hsiu Ho
  • Patent number: 10574132
    Abstract: Some apparatus and associated methods relate to conductivity modulation apparatus for active operations with an inductive element in a packaged circuit module formed with a bypass switch for configuration in parallel with an inductor. In an illustrative example, the bypass switch may be a controllable bidirectional switch formed of, for example, two anti-series connected MOSFETs. In some embodiments, the packaged module may include a main switch and/or a freewheeling rectifier (e.g., synchronous rectifier) operable as a buck-derived switched mode power supply. The bypass switch may, in operation, selectively circulate inductor current through the bypass switch, for example, to control the timing and/or quantity of energy transfer from the inductor to a load. In some implementations, the bypass switch may be operated, for example, to dynamically modulate conductivity across the terminals of an inductor in a buck-derived switched mode power supply to enhance circuit performance in numerous operational modes.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: February 25, 2020
    Assignee: Alpha and Omega Semiconductor (Cayman) Limited
    Inventor: Chris M. Young
  • Patent number: 10566808
    Abstract: A system for diagnosing a battery connection status includes: a DC-DC converter that converts and outputs a level of an input voltage; a battery connected to an output terminal of the DC-DC converter; and a controller that generates a control value for compensating for an error between a voltage command or a current command of the battery and a detection voltage or a detection current of the battery, controls the output of the DC-DC converter by applying the control value, and diagnoses a connection status between the DC-DC converter and the battery based on a change in error between the detection voltage or the detection current of the battery and the voltage command or the current command of the battery.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: February 18, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Won Kyoung Choi, Na Lae Kwon, Jee Heon Kim, Dong Jun Lee, Ho Joong Lee
  • Patent number: 10554050
    Abstract: A method comprises operating a plurality of power optimizers connected in series between two input terminals of an inverter, wherein the plurality of power optimizers are connected to a plurality of solar panels to form a plurality of power modules connected in series, measuring operation parameters of the plurality of the solar panels, calculating a maximum power flow of each solar panel based upon the measuring, determining a mode transition range based upon the maximum power flows of the plurality of solar panels and configuring a first power optimizer to operate in a pass-through mode if a maximum power point tracking (MPPT) current of a first solar panel connected to the first power optimizer is within the mode transition range.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 4, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Heping Dai, Xiaolin Mao, Dianbo Fu, Huibin Zhu
  • Patent number: 10541603
    Abstract: Circuits comprising: an inductor having a first side connected to VIN; a first switch having a first side connected to a second side of the inductor; a second switch having a first side connected to VIN; a first capacitor having a first side connected to a second side of the second switch; a third switch having a first side connected to a second side of the first switch; a fourth switch having a first side connected to a second side of the third switch; a fifth switch having a first side connected to a second side of the first capacitor and to a second side of the fourth switch, and having a second side coupled to a voltage source; and a second capacitor having a first side connected to the first side of the fourth switch, and having a second side connected to the second side of the fifth switch.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: January 21, 2020
    Assignee: Lion Semiconductor Inc.
    Inventors: Alberto Alessandro Angelo Puggelli, Thomas Li, Wonyoung Kim, John Crossley, Hanh-Phuc Le
  • Patent number: 10525535
    Abstract: The present invention is a portable and rechargeable drill system that allows a user to conveniently carry on the user's body and perform work. As a preferred and non-limiting example, the portable and rechargeable drill system is lightweight and is comprised of a drill handpiece, a battery-powered control device, and a securing member or mechanism for the drill handpiece. The drill system may further comprise a control device case or holder. The drill handpiece preferably comprises a first end, a second end, a drill bit-spindle and housing assembly, a drill bit locking mechanism, a motor and housing assembly, and a power cord.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: January 7, 2020
    Assignee: Luraco, Inc.
    Inventors: Kevin Le, Thanh Le, Abhishek Vinod Vazrekar
  • Patent number: 10530590
    Abstract: A method, computer program product and device for generating a power signal are provided. In a power distribution system (e.g. PoE), a device (2) (e.g. PD) comprising at least one capacitor (e.g. bulk capacitor) parallel to a load (26) of the device, is powered by a power supply (1) (e.g. PSE). The power supply (1) is arranged for powering the device (2) when at least a minimum current (e.g. MPS) is drawn by the device (2) from the power supply (1). The device (2) determines, by measuring the voltage over the at least one capacitor, whether the current is drawn (partially) from the at least one capacitor. In which case the device (2) is controlled to draw current such that at least a minimum current is drawn from the power supply (1) and the power supply (1) remains powering the device (2).
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 7, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Lennart Yseboodt, Matthias Wendt
  • Patent number: 10520970
    Abstract: A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to a common output node. Each of the phase units may be configured to source current to the output node in response to the assertion of a respective clock signal in order to generate a regulated supply voltage. Each phase unit includes a respective transconductance amplifier configured to generate a respective demand current dependent upon a reference voltage and the regulated supply voltage.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 31, 2019
    Assignee: Apple Inc.
    Inventors: Jay B. Fletcher, Shawn Searles, Fabio Gozzini, Sanjay Pant
  • Patent number: 10509428
    Abstract: A first voltage scaling power switch is coupled to a first power supply terminal for providing power to a first circuit portion, and a second voltage scaling power switch is coupled between the first power supply terminal providing power to a second circuit portion. A common power rail is coupled the first and second power input nodes during respective voltage scaling modes of the first and second circuit portions. A feedback circuit coupled to the common power rail provides a feedback signal to a control input of the first voltage scaling power switch to regulate a voltage provided by the first power switch, and to a control input of the second voltage scaling power switch to regulate a voltage provided by the second voltage scaling power switch.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: December 17, 2019
    Assignee: NXP USA, INC.
    Inventors: Dale John McQuirk, Miten H. Nagda, Nidhi Chaudhry, James Robert Feddeler, Stefano Pietri, Simon Gallimore
  • Patent number: 10511228
    Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: December 17, 2019
    Assignee: UPI SEMICONDUCTOR CORP.
    Inventors: Chih-Lien Chang, Min-Rui Lai
  • Patent number: 10468965
    Abstract: Disclosed are multi-stage multilevel DC-DC step-down converters. Stages may include three or four switches, and switches of each stage are operated at selected duty cycles such that each stage reduces an input voltage by one-half and voltage stress on switches is reduced. In some embodiments only a single output inductor is used in an LC filter, and the inductor may be very small as compared with a conventional Buck converter. Thus, embodiments provide DC-DC step-down converters with high power density and efficiency.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: November 5, 2019
    Assignee: Queen's University at Kingston
    Inventors: Tianshu Liu, Yan-Fei Liu
  • Patent number: 10468993
    Abstract: A photovoltaic module-mounted AC inverter circuit uses one or more integrated circuits, several power transistors configured as switches, several solid-dielectric capacitors for filtering and energy storage, several inductors for power conversion and ancillary components to support the above elements in operation. The integrated circuit includes all monitoring, control and communications circuitry needed to operate the inverter. The integrated circuit controls the activity of pulse-width modulated power handling transistors in both an input boost converter and a single-phase or multi-phase output buck converter. The integrated circuit also monitors all power processing voltages and currents of the inverter and can take appropriate action to limit power dissipation in the inverter, maximize the available power from the associated PV module and shut down the inverter output if the grid conditions so warrant.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: November 5, 2019
    Assignee: Enphase Energy, Inc.
    Inventor: Robert R. Rotzoll
  • Patent number: 10461641
    Abstract: A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: October 29, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Anthony B. Candage, Keng Chen, Paul Sisson
  • Patent number: RE47855
    Abstract: A dual mode regulator provides power to a tower mounted low noise amplifier (LNA) and operates in either one of two modes. The dual mode regulator comprises a microcontroller that controls the amplifier and two regulators to operate in an Antenna Interface Standards Group (AISG) mode when the microcontroller is detecting AISG protocol information or in a current window alarm (CWA) mode when the microcontroller is not receiving AISG protocol information. In the CWA mode the total current to the two regulators and associated circuitry is maintained at a constant amplitude. Further in the CWA mode, the microcontroller is able to generate an alarm signal and deactivate the amplifier when it detects improper operation by the amplifier. In the AISG mode, a single regulator is used and the other regulator is de-activated by the microcontroller.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: February 11, 2020
    Assignee: Nokia Shanghai Bell Co., Ltd.
    Inventors: Jing Wang, Gordon M. Siebert