Patents Assigned to Dialogic (US) Inc.
  • Regulated power supply voltage and triac hold-up current for a switching power converter
    Patent number: 10237931
    Abstract: A switching power converter is provided that includes a current source that controls the charging of a storage capacitor to provide a regulated internal power supply voltage.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: March 19, 2019
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventor: Chenglong Zhang
  • Accurate current sensing
    Patent number: 10234487
    Abstract: A current sense circuit for a pass transistor is described. The circuit comprises a sense transistor having input and control ports that are coupled to input and control ports respectively of the pass transistor. The circuit comprises a differential amplifier comprising a differential input and output. An output port of the pass transistor is coupled to a first port of the differential input and an output port of the sense transistor is coupled to a second port of the differential input. The differential amplifier comprises a first sub-amplifier and a second sub-amplifier that are arranged in parallel and which are operated in an auto-zero phase and in an amplification phase in an alternating manner, and which are operated in the auto-zero phase in a mutually exclusive manner. The output of the differential amplifier is used to control voltage drops across the sense transistor and the pass transistor.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: March 19, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Nicolo Nizza, Danilo Gerna
  • High efficiency switching boost converter with reduced inductor current ripple
    Patent number: 10230302
    Abstract: A voltage or current regulated power converter is presented. The power converter is configured to derive electrical power at an output voltage Vout at an output of the power converter from electrical power at an input voltage Vin at an input of the power converter, wherein the output voltage Vout is greater than or equal to the input voltage Vin. The power converter comprises an inductor, a plurality of capacitors and a plurality of switches. The input and output unit are coupled via an intermediate point, wherein the output unit comprises a first output or second output arrangement, and wherein the input unit comprises a first input or a second input arrangement. The power converter comprises a controller configured to control the plurality of switches such that a commutation cycle of the power converter comprises a plurality of different operation phases.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Holger Petersen
  • Isolated switching power converter with data communication between primary and secondary sides
    Patent number: 10230303
    Abstract: An isolated switching power converter is provided wherein a secondary side is valley mode switched to transmit data to a primary side. This provides secondary side regulation without the need for an optocoupler. Data communication between the primary and secondary sides of switching power converters is presented.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: March 12, 2019
    Assignee: Dialog Semiconductor, Inc.
    Inventors: Andrey Malinin, John Kesterson
  • Apparatus and method for driving a power stage
    Patent number: 10218258
    Abstract: A method and apparatus for driving a power stage is presented. In particular, the power stage is a half-bridge. In the method, there is a first power switch coupled to a second power switch via a switching node. The method steps include sensing a first control-terminal voltage of one of the first power switch and the second power switch and turning on the first power switch based on the first control-terminal voltage and sensing a second control-terminal voltage of one of the first power switch and the second power switch and turning on the second power switch based on the second control-terminal voltage. Optionally, the first power switch is turned on when the first control-terminal voltage has reached a first threshold value, and the second power switch is turned on when the second control-terminal voltage has reached a second threshold value.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Christoph N. Nagl, Horst Knoedgen, Nebojsa Jelaca
  • Power converter with improved transient load response
    Patent number: 10218255
    Abstract: A power converter which converts between a first current at a first voltage provided at a first node and a second current at a second voltage provided at a second node. The power converter has a flying capacitor, an inductor and five switches. Furthermore, the power converter has a control unit to control four switches during steady state operation within a sequence of different operations states, in order to set the second voltage or the second current to a target level. In addition, the control unit detects the occurrence of a load transient at the second node, and in reaction to detecting occurrence of a load transient, to at least partially close a bypass switch, in order to provide additional current from the flying capacitor to the second node or in order to divert current from the inductor towards the reference potential.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: February 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Holger Petersen
  • Overvoltage clamp in regulators
    Patent number: 10216207
    Abstract: A regulator for providing a load current at a regulator output voltage to a load at an output of the regulator is described. The regulator has a differential input stage to provide a differential output voltage based on a reference voltage and based on the regulator output voltage. Furthermore, the regulator has an output driver to generate a control signal based on the differential output voltage. In addition, the regulator has a pass transistor to provide the load current in dependence of the control signal. The regulator also has clamping circuitry to sense an overvoltage indication which indicates that the pass transistor is being turned off. Furthermore, the clamping circuitry clamps the differential output voltage to a clamping voltage, if the overvoltage indication indicates that the pass transistor is being turned off.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 26, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Hande Kurnaz, Ambreesh Bhattad, Frank Kronmueller
  • Power converter controller
    Patent number: 10206253
    Abstract: A controller for a power converter to convert electrical power at an input voltage into electrical power at an output voltage and a method of operating such controller is presented. The controller for controlling a power converter has an input port to receive a voltage representative of the input voltage; an input voltage measuring unit to sample a measuring voltage and to determine a measurement value that is representative of the input voltage; a switch; and a diode connectable with a storage unit to provide a supply voltage for the controller during operation of the controller. The switch controls the charging of the storage unit from the voltage at the input port.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Julian Tyrrell
  • Negative current clocking
    Patent number: 10205389
    Abstract: A switching mode power supply (SMPS) configured for clearing an overvoltage condition. The overvoltage is determined by detecting that the output voltage has exceeded the input voltage by a limited amount. The overvoltage is cleared by repetitively turning on and then off the switches controlling the flow of energy to the SMPS in sequence until the excess charge resulting from the overvoltage is couple to circuit ground, and the output is reduced to within acceptable limits.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Mark Childs, Paul Collins
  • Circuit and method for high-accuracy current sensing
    Patent number: 10205378
    Abstract: A circuit for providing a current flowing from a supply voltage into an electric load is presented. The circuit comprises a first circuit branch connected between the supply voltage and an output node connected to the electric load, wherein the first circuit branch comprises a first transistor device, a second circuit branch connected between the supply voltage and a predetermined voltage level, wherein the second circuit branch comprises a series connection of a second transistor device that is a scaled replica of the first transistor device and a current source. The control terminals of the first and second transistor devices are connected to each other. A control circuit is configured to control the voltage at the control terminal of the first transistor device depending on a current flowing through the first transistor device. The application further relates to a method of operating such circuit.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Danilo Gerna, Enrico Pardi
  • Run-time actionable information exchange system in a secure environment
    Patent number: 10205788
    Abstract: Systems and methods of implementing features in session border controllers at runtime after deployment. The systems can include a session border controller (SBC), and a user computer communicably coupled to the SBC by a network. The systems and methods can enable a user to introduce, via the user computer, actionable information (Al) into the SBC, which can store the Al in an Al registry. The SBC can expose or otherwise make available the Al stored in the Al registry to the user, allowing the user to generate and/or modify, using at least some of the Al, one or more policies and/or rules that can be implemented and/or executed by the SBC for introducing one or more features in the SBC. In this way, such features can be implemented in the SBC at runtime after deployment, without having to undergo a separate design and development cycle for the SBC.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: February 12, 2019
    Assignee: Dialogic, Inc.
    Inventors: Henry T. Peter, Romolo E. Raffo
  • Circuit and method of a switching converter with adaptive pulse insertion
    Patent number: 10205385
    Abstract: A circuit and method for a switching converter that modifies the clock frequency when the panic comparator is activated is proposed. This solution for a switching converter is achieved by increases in the switching frequency in response to an undershoot condition. In summary, a switching converter circuit, comprising at least one phase functional block configured to provide an output voltage, a panic comparator configured to evaluate voltage excursion conditions of the output voltage, and a clock generator with pulse insertion function wherein the pulse insertion function is configured to increase the switching frequency during a voltage excursion condition to minimize or mitigate voltage excursions. In addition, a switching converter circuit, comprising a clock generator with a pulse width extender configured to provide a signal to said pulse insertion function logic.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Seiichi Ozawa, Santhos Ario Wibowo
  • Voltage regulator with output capacitor measurement
    Patent number: 10203710
    Abstract: A voltage regulator which provides an output current at an output voltage at an output node of the voltage regulator, based on an input voltage at an input node of the voltage regulator is described. The voltage regulator has an output amplification stage for deriving the output current at the output node from the input voltage at the input node in dependence of a drive voltage. Furthermore, the voltage regulator has a differential amplification stage to determine the drive voltage in dependence of the output voltage and in dependence of a reference voltage. In addition, the voltage regulator has an adaption unit to determine a capacitance indication of a capacitor value of an output capacitor coupled to the output node of the voltage regulator. The adaption unit also adapts the differential amplification stage in dependence of the capacitance indication.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Ambreesh Bhattad, Frank Kronmueller, Hande Kurnaz
  • Multi-phase DC-DC converters with open-loop PWM for transient performance enhancement
    Patent number: 10199939
    Abstract: A multi-phase switching power converter includes a panic mode detector that triggers the activation of each phase in an open-loop mode of operation in which an open-loop duty cycle is used that is greater than a closed-loop duty cycle used during closed-loop operation for the active phases.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 5, 2019
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventors: Kevin Yi Cheng Chang, James Doyle, Qing Li, Xiaoying Yu, Ibiyemi Omole, Jonathon Stiff, Erik Mentze, Aysel Yildiz
  • Efficient power supply voltage regulation for synchronous rectifier controller
    Patent number: 10199951
    Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: February 5, 2019
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Pengju Kong, Xiaye Wang, Wenbo Liang, Jianming Yao
  • Stacked power supply for reduced current consumption
    Patent number: 10185347
    Abstract: A circuit arrangement comprising a first capacitor and a second capacitor which are arranged in series between a high potential and a low potential is described. The circuit arrangement comprises first power consuming circuitry which is arranged in parallel to the first capacitor. The first power consuming circuitry (113) consumes electrical power at a first voltage. The circuit arrangement comprises second power consuming circuitry which is arranged in parallel to the second capacitor. The second power consuming circuitry consumes electrical power at a second voltage, wherein a magnitude of the sum of the first voltage and the second voltage is smaller than an absolute difference between the high potential and the low potential. The circuit arrangement sets a voltage at the first capacitor in accordance to the first voltage and to set a voltage at the second capacitor in accordance to the second voltage.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: January 22, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Horst Knoedgen
  • Adjusting color temperature in a dimmable LED lighting system
    Patent number: 10187950
    Abstract: A LED lighting system, such as a dimmable LED lamp, that may simulate the performance of an incandescent bulb. LED strings of different colors may be connected to the output of a single LED driver that regulates an overall intensity of light produced by the LED lighting system. The color of the LED lighting system may be controlled by circuitry, such as one or more switches, that allocates current between the LED strings to change the color temperature of light emitted by the LED lighting system as the light intensity changes.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: January 22, 2019
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Liang Yan, Junjie Zheng
  • Methods and apparatus for discharging a node of an electrical circuit
    Patent number: 10186942
    Abstract: A node that stores a charge is discharged in two phases, starting with a current controlled phase where a current mirror sink controls the current sunk from the node, and then moving to a second phase where a resistive discharge is provided. A pull down device such as a transistor switches from its saturation mode in the first phase to its linear mode in the second phase. a discharge circuit implementing this method provides optimized area and control for the discharge process as compared with approaches that rely solely on current mirroring or resistive discharging.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: January 22, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Emre Topcu, Turev Acar, Kemal Ozanoglu
  • Switching converter with ramp-based output regulation
    Patent number: 10186967
    Abstract: A switching converter comprising a regulation circuit adapted to regulate an output value of the converter based on a ramp signal is provided. A feedback circuit adapted to control at least one of a delay and a slope of the ramp signal based on a parameter of the ramp signal is also provided. A method of regulating an output value of a switching converter is also presented.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: January 22, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Chi-Chia Huang, Yuan-Wen Hsiao
  • Adaptive control of the non-overlap time of power switches
    Patent number: 10181843
    Abstract: Circuitry for controlling a non-overlap time for a first switch and a second switch is described. Within a first state, the first switch is closed and the second switch is open, and within a second state, the first switch is open and the second switch is closed. The control circuitry has a first auxiliary switch and a second auxiliary switch. The control circuitry determines whether during a transition from the first state to the second state a current has flown through the serial arrangement of the first and second auxiliary switches. The control means adapts a non-overlap time between the first and second control signals for controlling a following transition from the first state to the second state, dependent on whether during said transition between the first and second states a current has flown through the serial arrangement of the first and second auxiliary switches.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 15, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Shafqat Ali