Switched (e.g., Switching Regulators) Patents (Class 323/351)
  • Patent number: 10720387
    Abstract: A tank circuit structure includes a first gate layer, a first substrate, a first shielding layer, a first conductive line and a first inter metal dielectric (IMD) layer. The first substrate is over the first gate layer. The first shielding layer is over the first substrate. The first conductive line is over the first shielding layer. The first IMD layer is between the first substrate and the first conductive line.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: July 21, 2020
    Inventors: Hsiao-Tsung Yen, Cheng-Wei Luo
  • Patent number: 10680521
    Abstract: An inductor and a shunt switch circuit are connected in parallel between an input node and an intermediate node. A first power transistor is connected between the intermediate node and a ground node. A second power transistor is connected between the intermediate node and an output node. The first and second power transistors are driven in response to a pulse width modulation (PWM) drive cycle having an on-time and an off-time. The input node receives a DC input voltage and a DC output voltage is generated at the output node. A control circuit senses the input and output nodes and determines whether the DC input voltage is within a threshold voltage of the DC output voltage. In response to that determination, the shunt switch circuit is turned on only during the off-time of the PWM drive cycle.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 9, 2020
    Assignee: STMicroelectronics S.r.l.
    Inventors: Alessandro Bertolini, Alberto Cattani
  • Patent number: 10630182
    Abstract: A multiphase converter system includes a multiphase converter in which a plurality of converters are connected in parallel; a cooler in which a cooling medium flows so as to cool the multiphase converter; a temperature sensor configured to measure a temperature of the cooling medium; and a controller. The controller is configured to drive the converter for n phase or the converters for n phases when a target output of the multiphase converter is lower than a prescribed output threshold and the temperature of the cooling medium falls within a prescribed temperature range, and to drive the converters for m phases when the target output is lower than the prescribed output threshold and the temperature of the cooling medium is lower than the prescribed temperature range, m being larger than n.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: April 21, 2020
    Inventor: Akinobu Murakami
  • Patent number: 10469065
    Abstract: A circuit for operating a transistor device that acts as a switch is presented. The circuit includes the transistor device and a control circuit coupled to a gate of the transistor device. The control circuit is adapted to selectively apply at least a first voltage level, a second voltage level, and a third voltage level to the gate of the transistor device, wherein the first, second, and third voltage levels are distinct voltage levels. The disclosure further relates to a method of operating a transistor device that acts as a switch. The proposed circuit provides additional gate voltages, by contrast to conventional two-level gate drivers. By appropriate choice of the additional gate voltages, reverse mode conductance losses of the transistor device can be reduced and/or to the Safe Operating Area (SOA) of the transistor device can be improved.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: November 5, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Christoph N. Nagl, Nebojsa Jelaca, Frank Kronmueller, Ambreesh Bhattad
  • Patent number: 10389271
    Abstract: A single-phase four-level inverter circuit topology and a three-phase four-level inverter circuit topology. The single-phase four-level inverter circuit topology is adapted to be used with two series-connected direct current power sources, so as to enable a first direct current power source or a second direct current power source to supply power to a load of the four-level inverter circuit topology, alternatively, any one of two direct current power sources is first algebraically superimposed with a flying capacitor and then supplies the power to the load of the four-level inverter circuit topology (M), thereby making the four-level inverter circuit topology output four different levels.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: August 20, 2019
    Inventors: Hongliang Wang, Yan-Fei Liu
  • Patent number: 10372568
    Abstract: An electronic device has a first terminal for receiving power from a connected external device, a second terminal for obtaining information of the external device, and a GND terminal connected to the second terminal. The electronic device causes a resistance between the second terminal and the GND terminal to change, and determines a type of the external device based on a voltage of the first terminal after the resistance is caused to change.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: August 6, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasusaburo Degura, Hidenori Shiba, Masakazu Nakadokoro
  • Patent number: 10333309
    Abstract: An arrangement includes at least one series circuit having at least two series-connected submodules and an inductor. At least one of the submodules in one or a plurality of the series circuits has a step-up/step-down converter and a storage module. A protective module with at least one actuator is electrically connected between the step-up/step-down converter and the storage module. A method for operating the arrangement is also provided.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: June 25, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rodrigo Alonso Alvarez Valenzuela, Martin Pieschel, Ervin Spahic
  • Patent number: 10203707
    Abstract: A solid-state switch, comprising at least one switch controller. At least one switch having a first terminal coupled to a power source, a second terminal coupled to the power source and a control terminal coupled to the switch controller and configured to selectively conduct and block current flow from the first terminal to the second terminal. At least one power converter coupled to the first terminal and the second terminal and configured to convert power from the power source from a first voltage level to a second voltage level and to provide power at the second voltage level to the switch controller.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: February 12, 2019
    Assignee: TRIUNE IP, LLC
    Inventors: Ross E. Teggatz, Eric C. Blackall
  • Patent number: 10189370
    Abstract: An electrical source control apparatus has a selecting device for selecting one switching element from at least two switching elements each of which constitutes predetermined arm element whose switching state should be changed to perform the electrical power conversion, when the electrical power converter performs the electrical power conversion with either one of the first and the second electricity storage apparatuses; and a controlling device for controlling the electrical power converter to change a switching state of the selected one switching element while keeping a switching state of another one switching element in an ON state, the selecting device newly selects the one switching element to reduce a difference between temperatures of the at least two switching elements each of which constitutes predetermined arm element.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: January 29, 2019
    Inventor: Yusuke Seo
  • Patent number: 9979279
    Abstract: In electrical systems with DC-DC converters having synchronous rectification (SR) on the output stage, the input voltage can be monitored. When a potentially destructive transient occurs, the SR is rapidly turned on in a non-synchronous manner to “crowbar” the main power transformer. The resulting short circuit is reflected back to the DC input under current-limited pulse width modulation (PWM) control. In effect, the entire surge rating of the power train is applied to the potentially destructive input transient. The clamping capacity can be controlled accurately and is significantly more than what is available in prior art components and systems. When the input voltage is pulled down to safe levels, the clamp circuit disengages and the DC-DC converter returns to normal operation. DC output voltage regulation to the connected load is not maintained during this clamping event, but maintaining output voltage regulation during such destructive transients is not required.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: May 22, 2018
    Assignee: Sensata Technologies, Inc.
    Inventors: Kirk Randall Soldner, Gary Neil Johnson
  • Patent number: 9935630
    Abstract: An AC switch circuit coupled between an AC input signal and an AC load has a first switch, a second switch, a driving circuit, and a power generation circuit. The first switch blocks a first half-cycle of the AC input signal when turned OFF, and the second switch blocks a second half-cycle of the AC input signal when turned OFF. The driving circuit provides a driving signal to control the first switch and the second switch based on an enable signal. The power generation circuit provides a voltage signal to power the driving circuit. The power generation circuit stores energy from the AC input signal when the first switch and the second switch are turned OFF, and the power generation circuit is disconnected from the AC input signal when the first switch and the second switch are turned ON.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: April 3, 2018
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Jian Jiang, Pengjie Lai, Bo Zhou, Junyong Gong, Eric Yang
  • Patent number: 9742281
    Abstract: In one embodiment an Inductive buck-boost-converter has an input (In) to which an input voltage (Vin) is supplied, an output (Out) at which an output voltage (Vout) is provided as a function of the input voltage (Vin), an inductor (L) having a first and a second terminal (Lx1, Lx2), a first switch (A) which switchably connects the inductor's (L) first terminal (Lx1) to the input (In), a second switch (B) which switchably connects the inductor's (L) first terminal (Lx1) to a ground potential terminal (10), a third switch (C) which switchably connects the inductor's (L) second terminal (Lx2) to the ground potential terminal (10), a fourth switch (D) which switchably connects the inductor's (L) second terminal (Lx2) to the output (Out), and a control unit (CTL) coupled to respective control inputs of first, second, third and fourth switches (A, B, C, D). Therein the converter is operated in three phases (1, 2, 3) by the control unit (CTL).
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: August 22, 2017
    Assignee: AMS AG
    Inventor: Emir Serdarevic
  • Patent number: 9667166
    Abstract: A five-level converting device includes a first switch module, a second switch module and a third switch modules each connects to a neutral point, a positive terminal and a negative terminal of a bus capacitor module. A first switch module includes a plurality of bidirectional switching circuits cascaded to each other, and each bidirectional switching circuit includes two first switching units reversely connected in series. Second switch module includes a plurality of second switching units connected in series. Third switch module includes a plurality of third switching units connected in series. A first flying capacitor unit is connected across the first switching module and a second switch module, and a second flying capacitor unit is connected across the first switching module and a third switching module. The first flying capacitor unit and the second flying capacitor unit are connected to different connection points between the first switch units respectively.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: May 30, 2017
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Hong-Jian Gan, Bo-Yu Pu, Ming Wang
  • Patent number: 9355610
    Abstract: A power supply includes an inputter including an input capacitor and configured to receive an input DC voltage, a converter including an output capacitor and configured to convert the input DC voltage and to output the converted DC voltage, and a controller configured to control the converter to output a voltage corresponding to a reference voltage.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: May 31, 2016
    Inventors: Byeong-cheol Hyeon, Joon-hyun Yang, Sang-hoon Lee
  • Patent number: 9317019
    Abstract: Disclosed herein are sinusoidal modulation control methods and circuits for PMSM. In one embodiment, a method can include: detecting rotor position information of the PMSM to obtain a rotor position signal and a rotor rotating speed measured value; comparing the rotating speed measured value against a reference rotating speed value to generate an error signal, and generating a first regulating voltage signal based on the error signal using a PI regulator; receiving the rotor position signal and the first regulating voltage signal, and generating a full-wave U-shaped modulation wave by using the rotor position signal as a time reference; generating a second U-shaped modulation wave by multiplying the full-wave U-shaped modulation wave with the first regulating voltage signal; comparing the second U-shaped modulation wave against a triangular wave to generate a PWM control signal that controls a switch of an inverter to regulate a current of the PMSM.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: April 19, 2016
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Xiaodong Huang
  • Patent number: 9225183
    Abstract: A charging system is disclosed for charging a battery system of an electric vehicle. In one form, the charging system includes a first connector including a power control unit that is operable to selectively supply charging power from a power source. A second connector is connected with the first connector and includes a fault detection circuit. A controller is connected with the fault detection circuit and the power control unit. The controller is operable to control the power control unit to selectively supply charging power to a battery system if a fault is not detected from fault detection circuit. A cordset for use with the charging system is also disclosed that allows the cordset to perform certain electrical functions and connect the cordset to a connector of the vehicle in a breakaway manner.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: December 29, 2015
    Assignee: Club Car, LLC
    Inventor: Russell W. King
  • Patent number: 9099936
    Abstract: A high voltage direct current (HVDC) converter system includes a line commutated converter (LCC) configured to convert a plurality of AC voltages and currents to a regulated DC voltage of one of positive and negative polarity and a DC current transmitted in only one direction. The HVDC converter system also includes a buck converter configured to convert a plurality of AC voltages and currents to a regulated DC voltage of one of positive and negative polarity and a DC current transmitted in one of two directions. The LCC and the buck converter are coupled in parallel to an AC conduit and are coupled in series to a DC conduit. The HVDC converter system further includes a filtering device coupled in parallel to the buck converter through the AC conduit. The filtering device is configured to inject AC current having at least one harmonic frequency into the AC conduit.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 4, 2015
    Assignee: General Electric Company
    Inventors: Ranjan Kumar Gupta, Nilanjan Ray Chaudhuri, Luis Jose Garces, Rajib Datta
  • Patent number: 9048837
    Abstract: A cascode transistor includes: a first switch; a second switch that has a withstand voltage higher than that of the first switch and is cascade coupled to a drain of the first switch; and a circuit in which a third switch and a capacitor are coupled in series with each other and that is provided between a connection node and a source of the first switch, the connection node being a node at which the first switch and the second switch are coupled to each other.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: June 2, 2015
    Inventors: Tatsuya Hirose, Kazukiyo Joshin
  • Publication number: 20150115931
    Abstract: A power supply system may include a target device and an adapter. The target device may include an adapter connection switch that receives adapter recognition information to form a connection with the adapter, a voltage detection unit that receives an output voltage from an adapter, and a voltage-change-requesting unit that outputs a voltage to request a voltage change based on information on the output voltage from the adapter. The adapter may include a device information recognition unit that receives the voltage to request a voltage change, and an output-voltage-changing unit that changes the output voltage based on the voltage to request a voltage change.
    Type: Application
    Filed: May 8, 2014
    Publication date: April 30, 2015
    Inventors: Young Seung NOH, Kwang Soo CHOI, Bo Mi LEE, Chan Sung JANG
  • Patent number: 9001098
    Abstract: A power supply system includes a control unit comprising a detecting and converting unit that is operable to generate a detected current based on a difference between a set voltage and a voltage representative of a current flow through an energy storage member.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung-Ho Seo, Hee-Seok Han
  • Patent number: 8988059
    Abstract: Techniques for optimizing the trade-off between minimizing switching losses and minimizing conduction losses in a buck converter. In an aspect, each of a high-side switch and a low-side switch may be implemented as a plurality of parallel-coupled transistors, each transistor having an independently controllable gate voltage, allowing adjustment of the effective transistor size. In response to the target voltage of the buck converter corresponding to a relatively high voltage range, more high-side switch transistors and fewer low-side switch transistors may be selected. Similarly, in response to the target voltage corresponding to a relatively low voltage range, more low-side switch transistors and fewer high-side switch transistors may be selected. In an aspect, the techniques may be applied during a pulse-frequency modulation mode.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Joseph D Rutkowski
  • Patent number: 8981734
    Abstract: A power source generation circuit includes a regulator circuit which receives an external power source voltage VDDA from an external power source, and generates a predetermined internal power source voltage on a given terminal VDD; and a charging circuit which connects the external power source and the given terminal when the external power source voltage VDDA supplied from the external power source is equal to or lower than a predetermined threshold voltage.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: March 17, 2015
    Assignee: Panasonic Corporation
    Inventors: Eiichi Sadayuki, Kazuki Yoshioka
  • Patent number: 8957651
    Abstract: An intelligent pulse width modulation (PWM) controller adapts a switch mode power supply (SMPS) system's operating parameters to optimize efficiency, remove hot spots and isolate faults by integrating a microcontroller, PWM digital circuits and analog circuits into a single integrated circuit, thereby reducing the number of external connections, silicon die area and integrated circuit packages. A communications interface is used to communicate with a host system for monitoring operating parameters of the SMPS, e.g., current, voltage, efficiency, operating temperature, diagnostics, etc. In addition, the communications interface may be used to alter the operating parameters (objectives) of the SMPS during operation thereof.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: February 17, 2015
    Assignee: Microchip Technology Incorporated
    Inventors: Terry Cleveland, Clifford Ellison, III, Scott Dearborn, Keith Pazul
  • Patent number: 8954767
    Abstract: Consistent with an example embodiment, there is a power regulator arrangement with variable current capacity providing power from a power supply to a load having variable demand. As a load, a high-performance microprocessor has several modes of operation. At the highest speed setting, it demands a lot of current. At slower clock speeds and during state retention, the processor has a very low current consumption. Using a single regulator, the current efficiency may be very low during long standby periods. To increase the efficiency even at lower load currents, a scheme is based on parallel operation of multiple regulators having different load ranges, for example, a “low, “medium,” and “high” range regulators. Having knowledge of the load current profile, the regulators can be adjusted such that the peak of the efficiency curve matches the load profile of the regulator. The efficiency of the power regulator arrangement is enhanced throughout the range of power demanded by the load.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: February 10, 2015
    Assignee: NXP B.V.
    Inventors: Andre Gunther, Kevin Mahooti, Meng Hao
  • Publication number: 20150035514
    Abstract: A DC-DC converter with low power consumption and high power conversion efficiency is provided. The DC-DC converter includes a first transistor and a control circuit. The control circuit includes an operational amplifier generating a signal that controls switching of the first transistor, a bias circuit generating a bias potential supplied to the operational amplifier, and a holding circuit holding the bias potential. The holding circuit includes a second transistor and a capacitor to which the bias potential is supplied. The first transistor and the second transistor include a first oxide semiconductor film and a second oxide semiconductor film, respectively. The first oxide semiconductor film and the second oxide semiconductor film each contain In, M (M is Ga, Y, Zr, La, Ce, or Nd), and Zn. The atomic ratio of In to M in the first oxide semiconductor film is higher than that in the second oxide semiconductor film.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 5, 2015
    Inventors: Jun Koyama, Kei Takahashi
  • Publication number: 20150028843
    Abstract: The present disclosure relates to methods, systems and a module for operating a power converter module, the power converter module comprises a voltage source, a remote control terminal configured to be connected to a voltage potential for remote control of the power converter module. A voltage converter is configured to send an alarm signal, determine the voltage potential of the remote control terminal, and control an output voltage of the voltage converter at an output terminal of the power converter module based on the determined voltage potential of the remote control terminal. An alarm branch is configured to change the voltage potential of the remote control terminal by a voltage source in response to an alarm signal from the voltage converter when the remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal.
    Type: Application
    Filed: March 1, 2012
    Publication date: January 29, 2015
    Applicant: Telefonaktiebolaget L.M. Ericsson (publ)
    Inventors: Magnus Karlsson, Oscar Persson
  • Patent number: 8937472
    Abstract: Disclosed is a DC-DC converter including: a switch unit controlling a flow of a current based on a buck-boost topology; a short circuit unit short circuited or opened according to an external setting to change a topology of the switch unit; an inductor storing a current induced by the switch unit; a topology selecting unit selecting a topology in response to an external input signal and generating a signal corresponding to the selected topology; a pulse width modulating unit generating a signal for determining an operation time of the switch unit; a reverse flow detecting unit detecting a reverse flow of a current flowing through the switch unit to generate a signal; and a switch control unit controlling the switch unit in response to signals of the topology selecting unit, the pulse width modulating unit and the reverse flow detecting unit.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: January 20, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sewan Heo, Yil Suk Yang, Jong Kee Kwon
  • Patent number: 8922191
    Abstract: A peak current controlled switching voltage regulator system and method for providing a self-power down mode. An on-chip voltage regulator integrated into an on-chip digital logic circuit provides a core supply voltage to the on-chip digital logic circuit along with an off-chip inductor. An off-chip regulator connected to the on-chip digital logic circuit provides an external core supply voltage with respect to the on-chip digital logic circuit. A start-up circuit operates the on-chip voltage regulator in a self-power down mode for a pre-determined time period when the on-chip regulator is not connected to the off-chip inductor in order to maintain an equilibrium voltage supply with respect to the on-chip digital logic circuit.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: December 30, 2014
    Assignee: LSI Corporation
    Inventors: Prasad Sawarkar, Srinivas Reddy Chokka
  • Publication number: 20140375383
    Abstract: A power supply is disclosed herein. For example, a method for controlling the power supply can include dynamically programming a threshold voltage. The method can also include down-converting an input voltage to generate a down converted voltage at an output voltage node. Further, the method can include passing the input voltage to the output voltage node when a supply voltage exceeds the threshold voltage.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Applicant: ParkerVision, Inc.
    Inventors: Gregory S. SILVER, David F. SORRELLS, Gregory S. RAWLINS
  • Patent number: 8912781
    Abstract: An integrated circuit (IC) controller for a switching power supply has a selectable operating mode for supporting multiple switching power supply topologies. The IC controls current by controlling a cycle rate of the switching power supply to provide a constant or variable output current, which may be provided to lighting devices such as light-emitting diodes (LEDs). The selectable operating mode includes at least a buck converter operating mode and another operating mode, which may be a flyback converter operating mode.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: December 16, 2014
    Assignee: Cirrus Logic, Inc.
    Inventors: Rahul Singh, John L. Melanson
  • Patent number: 8896276
    Abstract: A DC-DC converter, capable of operation in either a boost or buck mode, includes a voltage source connected to an input switch through an inductive element such that a closed loop is formed. The DC-DC converter includes a switching network that receives one or more clock signals from an external clock source. The switching network has a first terminal connected to the inductive element, a second terminal connected to a first capacitor, and a third terminal connected to a second capacitor, wherein the switching network enables charging of the first capacitor and the second capacitor based on one or more clock signals such that the first capacitor and the second capacitor are charged alternately. The DC-DC converter includes a filter connected to a fourth terminal of the switching network, wherein the first capacitor and the second capacitor discharge alternately based on the one or more clock signals through the filter.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: November 25, 2014
    Assignee: Anadigics, Inc.
    Inventors: Adam Dolin, Paul Sheehy, Dirk Leipold
  • Publication number: 20140339995
    Abstract: A power stage for light emitting diode (LED)-based light bulbs may include a bipolar junction transistor (BJT). The base of BJT switch may be biased externally and the operation of the BJT may be through a single pin to the emitter of the BJT. A controller integrated circuit (IC) may control the power stage through the main BJT's emitter pin in an emitter-controlled BJT-based power stage. The emitter-controlled BJT-based power stage may replace the conventional buck-boost power stage topology. For example, the controller may activate and deactivate a switch coupling the BJT's emitter to ground. A power supply for the controller IC may be charged from a reverse recovery of charge from the BJT, and the reverse recovery controlled by the controller IC.
    Type: Application
    Filed: May 16, 2014
    Publication date: November 20, 2014
    Applicant: Cirrus Logic, Inc.
    Inventors: Ramin Zanbaghi, John L. Melanson, Jieyeon Choi
  • Patent number: 8878514
    Abstract: Circuits and related methods for energy efficient battery supplied switching DC-to-DC regulators are disclosed. When entering a power-down state the energy in an output capacitor is harvested and charged back to the battery. This is achieved by ramping-down a reference voltage after a power-down sequence is initiated. The output voltage of the regulator is ramped-down accordingly. At the end of the power down sequence the output voltage of the regulator is down to 0V. The disclosure is especially important for regulators, which frequently are started up and switched down.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: November 4, 2014
    Assignee: Dialog Semiconductor GmbH
    Inventors: Takashi Fujisaki, Hidenori Kobayashi
  • Patent number: 8866467
    Abstract: Systems and methods are disclosed to provide a process independent circuit for measuring output current of low drop out (LDO) regulators as well as buck regulators. The system can also measure the on resistance (RDSon) of the buck power transistors.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: October 21, 2014
    Assignee: Adaptive Digital Power, Inc.
    Inventor: Donald Wile
  • Patent number: 8860394
    Abstract: A dynamic voltage response network for a switching regulator with droop control providing a droop control signal includes a voltage identification setting network, a pass and hold system, and a reset network. The voltage identification setting network initiates a hold condition and adjusts an output voltage reference in response to a change in a voltage identification input. The pass and hold system passes the droop control signal during a pass condition and holds the droop control signal during the hold condition. The reset network resets the pass and hold system to the pass condition in response to a reset signal. The reset signal may be provided in response to a variety of conditions, such as load transients, proximity between the developed droop control signal and the held droop control signal, timeout after the output voltage reference is adjusted, among other reset conditions.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: October 14, 2014
    Assignee: Intersil Americas LLC
    Inventors: M. Jason Houston, Steven P. Laur, Rhys S. A. Philbrick
  • Publication number: 20140292293
    Abstract: A voltage regulator for providing power to a system includes feedforward circuitry receiving a signal from the system indicating the current needed by the system, and the feedforward circuitry causes the voltage regulator to change the voltage regulator output current in response to the signal from the system.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 2, 2014
    Applicant: Texas Instruments Deutschland GMBH
    Inventors: Florian Feckl, Nigel Peter Smith, Erich Johann Bayer
  • Publication number: 20140266143
    Abstract: A method includes receiving, at a voltage regulator, an activity adjustment signal from a digital circuit. The method also includes controlling one or more variable impedance elements of the voltage regulator to modify an output voltage provided to the digital circuit. The output voltage is based at least in part on the activity adjustment signal.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Martin Saint-Laurent, Yuhe Wang
  • Patent number: 8836316
    Abstract: A power supply system to provide power for a central processing unit (CPU) includes a bridge circuit, a pulse width modulation (PWM) controller and a pulse adjusting driver circuit. The bridge circuit detects a work state of the PWM controller to obtain a feedback signal output from the PWM controller, and provides the feedback signal to the CPU. The CPU outputs a control signal to the bridge circuit according to a work state of the CPU and the feedback signal, and the bridge circuit outputs a PWM signal to the pulse adjusting driver circuit according to the control signal. The pulse adjusting driver circuit receives a first driving signal provided by an external circuit, and adjusts the first driving signal according to the PWM signal to generate at least one second driving signal to drive the CPU.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: September 16, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Fang-Ta Tai, Chen-Hsiang Lin, Jen-Fan Sun, Cheng-I Lin
  • Publication number: 20140253090
    Abstract: An integrated circuit is operable for implementing any of multiple switched mode or linear power control topologies. The integrated circuit includes a control unit, and functional blocks each of which includes circuitry. The control unit is operable selectively to enable particular ones of the functional blocks in response to an input signal indicative of a particular one of the switched mode or linear mode power control topologies.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 11, 2014
    Inventors: Dilip Sangam, Wai-Keung Peter Cheng
  • Patent number: 8829871
    Abstract: A DC-DC converter includes a current control stage configured to provide a threshold based on an output voltage, an input voltage, and a reference voltage for the DC-DC converter. An off time control can be configured to receive the threshold and control an off time for the DC-DC converter based on the threshold such that the off time is inversely proportional to the peak current generated by the DC-DC converter.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: September 9, 2014
    Assignee: Texas Instruments Deutschland GmbH
    Inventor: Erich J. Bayer
  • Publication number: 20140241015
    Abstract: The invention relates to a control device (1) employed in a switched electrical power supply system to control a DC/DC converter of said switched electrical power supply system, said control device comprising a first input terminal (A) and a second input terminal (B), a first transistor (T1) connected via its source to the second input terminal (B) and a second transistor (T2) furnished with a gate (G) and connected via its drain (D) to the first input terminal (A), and via its source (S) to the first transistor (T1), the control device comprising a control assembly connected to the gate (G) of the second transistor (T2) and to the second input terminal (B) and comprising a capacitor (Ca) and a first Zener diode (Dz1) connected in series to said capacitor (Ca) and a second Zener diode (Dz2) connected between the gate (G) and the source (S) of the second transistor (T2).
    Type: Application
    Filed: February 10, 2014
    Publication date: August 28, 2014
    Applicant: Schneider Toshiba Inverter Europe SAS
    Inventors: Allan BARAUNA, Hocine BOULHARTS
  • Patent number: 8816653
    Abstract: A circuit for a semiconductor switching element including a transformer. One embodiment provides a first voltage supply circuit having a first oscillator. A first transformer is connected downstream of the first oscillator. A first accumulation circuit for providing a first supply voltage is connected downstream of the first transformer. A driver circuit having input terminals for feeding in the first supply voltage and having output terminals for providing a drive voltage for the semiconductor switching element, designed to generate the drive voltage for the semiconductor switching element at least from the first supply voltage.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: August 26, 2014
    Assignee: Infineon Technologies Austria AG
    Inventors: Marcus Nuebling, Jens Barrenscheen, Bernard Strzalkowski
  • Patent number: 8816662
    Abstract: An object is to reduce power consumption of a semiconductor device including a DC-DC converter circuit. The semiconductor device includes a DC-DC converter circuit and a microprocessor. The DC-DC converter circuit includes a conversion circuit including an inductor and a transistor, and a control circuit including a comparison circuit and a logic circuit. A hysteresis comparator is used as the comparison circuit. In the control circuit, the comparison circuit compares an output signal of the conversion circuit with a first reference potential or a second reference potential, and the logic circuit performs arithmetic operation between an output signal of the comparison circuit and a clock signal of the microprocessor. In the conversion circuit, the transistor controls current flowing through the inductor in accordance with an output signal of the logic circuit, and the output signal of the conversion circuit is generated in accordance with the current flowing through the inductor.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: August 26, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kei Takahashi, Yoshiaki Ito
  • Publication number: 20140235301
    Abstract: A method includes, in a mobile communication terminal that is powered by a DC-DC converter and is operated by a user in accordance with multiple possible usage scenarios, determining a usage scenario according to which the terminal currently operates. One or more parameters of operation for the DC-DC converter are derived from the usage scenario. The DC-DC converter is configured to supply electrical power to the terminal using the derived parameters of operation.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 21, 2014
    Applicant: Marvell International Ltd.
    Inventors: Eran Segev, Shimeon Greenberg
  • Patent number: 8810232
    Abstract: A method and apparatus for providing intermittent or interruptible power to an electronic device. The circuit may provide power upon user initiation and interrupt that power in response to a user command, fault state, period of inactivity and so forth. As one example, interruptible power may be initially provided to activate or “power up” an electronic device and constant power provided after the initial activation. The initial powering up of the device may be facilitated by closing two contacts. The circuit may continue to provide power after the button is released through a monitoring and/or feedback mechanism.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: August 19, 2014
    Assignee: Apple Inc.
    Inventor: John M. Depew
  • Patent number: 8797009
    Abstract: A voltage converter includes a power switch having respective charging and discharging control terminals, and an output terminal coupled to a series connected inductor and capacitor. The voltage converter also includes a charging switch coupled to the charging control terminal of the power switch, a discharging switch coupled to the discharging control terminal of the power switch, and a feedback circuit coupling the power switch, charging switch and discharging switch to a node at which the capacitor and inductor are connected. During a charging phase, the charging switch couples the capacitor to the charging control terminal of the power switch, and during a discharging phase, the discharging switch couples the capacitor to the discharging control terminal of the power switch.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: August 5, 2014
    Assignee: CSR Technology Inc.
    Inventor: Ludovic Oddoart
  • Patent number: 8773083
    Abstract: A method, apparatus, and device provide for the detection of insufficient supplied power supplied to a device. A current multiplier of the device, operable as a voltage regulator, is coupled to the power source, receives a clock signal, and generates a control signal. A digital counter, clocked by the clock signal and reset by the control signal, generates an overflow output in response to an overflow condition of the digital counter that indicates that the current sourcing capability of the power source has fallen below a current threshold of the device. A compensatory response by the device in response to the detection of insufficient supplied power may be provided as well.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: July 8, 2014
    Assignee: Sunrise Micro Devices, Inc.
    Inventors: Frederick L. Martin, Edgar H. Callaway, Jr.
  • Publication number: 20140184191
    Abstract: The invention provides a system and a device for reducing standby power consumption. The system for reducing standby power consumption, comprises a power regulator, a power detecting circuit and a HIC module, and the HIC module is controlled by a MCU to efficiently reduce standby power consumption.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 3, 2014
  • Patent number: 8766609
    Abstract: A power supply controller includes: a controlling section that, upon determination that no anomaly has occurred, causes a semiconductor switch to execute turning on and, upon determination that the anomaly has occurred, causes the semiconductor switch to maintain an off state; a monitoring section that monitors which condition the controlling section is in, the condition being normal or anormal; and a switching section that, upon monitoring result by the monitoring section indicating the normal condition, causes turning on and off of the semiconductor switch by the controlling section and, upon the monitoring result indicating the anormal condition, causes turning on and off of the semiconductor switch with an external on-off command signals.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: July 1, 2014
    Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Tomohiro Babasaki, Seiji Takahashi
  • Publication number: 20140175868
    Abstract: An electric power supply apparatus includes a choke coil, a switching element, a resonance circuit and a compensation circuit. The parasitic capacitance of the switching element is larger than a predetermined capacitance needed for realizing class E zero-voltage switching. The compensation circuit is connected in parallel with the switching element. The compensation circuit includes a coil and a capacitor, and has inductive impedance.
    Type: Application
    Filed: July 25, 2012
    Publication date: June 26, 2014
    Inventors: Hiroyuki Sakakibara, Shinji Ichikawa