With Ramp Generator Or Controlled Capacitor Charging Patents (Class 323/288)
  • Patent number: 10979042
    Abstract: Systems, methods, and apparatus for use in biasing and driving high voltage semiconductor devices using only low voltage transistors are described. The apparatus and method are adapted to control multiple high voltage semiconductor devices to enable high voltage power control, such as power amplifiers, power management and conversion (e.g. DC/DC) and other applications wherein a first voltage is large compared to the maximum voltage handling of the low voltage control transistors. According to an aspect, timing control of edges of a control signal to the high voltage semiconductor devices is provided by a basic edge delay circuit that includes a transistor, a current source and a capacitor. An inverter can be selectively coupled, via a switch, to an input and/or an output of the basic edge delay circuit to allow for timing control of a rising edge or a falling edge of the control signal.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: April 13, 2021
    Assignee: pSemi Corporation
    Inventor: Gary Chunshien Wu
  • Patent number: 10958173
    Abstract: The present disclosure provides for a processing element configured to couple to a first ramp generator and a second ramp generator and control the first ramp generator while a power converter is operating in a buck-boost mode of operation to generate a first ramp signal beginning at a first value and increasing to a second value during a first clock cycle and generate the first ramp signal beginning at the first value and increasing to a third value during a second clock cycle following the first clock cycle and control the second ramp generator while the power converter is operating in the buck-boost mode of operation to generate a second ramp signal beginning at a fourth value and decreasing to a fifth value during the first clock cycle and generate the second ramp signal beginning at the fourth value and decreasing to a sixth value during the second clock cycle.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: March 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Franz Prexl, Anmol Sharma
  • Patent number: 10914787
    Abstract: The present invention discloses a method and an apparatus for processing data of a multifunctional automobile charger by using a microprocessor. A main program module, an ignition current detection module, a charging current detection module, an internal battery constant current charging detection module, an internal battery temperature detection module, an output current detection module, a wireless charging failure detection module, a module for Bluetooth communication with a mobile phone and so on are loaded in a single chip microcomputer. Instructions of the modules are executed by a processor. The present invention provides an ignition function for an automobile, can communicate with a mobile phone, and is convenient to use.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: February 9, 2021
    Inventors: Jianxin Ye, Yuping Luo, Shihao Huang
  • Patent number: 10868522
    Abstract: An optical emission circuit includes a power supply source and a regulation circuit coupled to control the power supply source. An optical source and a first switch are coupled in series to the power supply source. A square pulse signal source has an output coupled to a control input of the first switch. The square pulse signal source is configured to provide a square pulse signal. The regulation circuit regulates the current supplied by the power supply source according to a product of a peak current set point by a duty cycle of the square pulse signal.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 15, 2020
    Assignee: STMicroelectronics (ALPS) SAS
    Inventor: Xavier Branca
  • Patent number: 10848048
    Abstract: The disclosure provides for a slope voltage compensation circuit with an adaptive slope compensation method, in a DC-DC switching converter operating in current control mode, at duty cycles greater than 50%. The proposed solution allows for the dynamic range of useful operation to be extended, lowering the slope voltage compensation at the beginning of the cycle, and then increasing the compensation as 50% duty cycle is achieved. This method is based on voltage control instead of time, and a second phase of a clock is not required.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 24, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Hirohisa Tanabe
  • Patent number: 10809751
    Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a charge cycle, source current to the regulated power supply node. In response to initiating the charge cycle, a control circuit may generate a control current using a voltage level of the regulated power supply node and a reference voltage level. The control circuit may also generate compensation and correction currents that are used with a sensed inductor current to determine when to halt the charge cycle.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: October 20, 2020
    Assignee: Apple Inc.
    Inventors: Jonathan F. Bolus, Fabio Gozzini
  • Patent number: 10790739
    Abstract: A power supply system with redundant control includes a power conversion unit configured to provide a regulated output voltage, a first power supply controller configured to control the power conversion unit such that the regulated output voltage is within a selected range, a second power supply controller having power supply controller diversity from the first power supply controller configured to control the power conversion unit such that the regulated output voltage is within a selected range, and a controller selector configured to enable either the first power supply controller or the second power supply controller in response to a control signal from a logic control circuit. The power supply controller diversity can be duty cycle diversity, frequency diversity, power supply requirement diversity, manufacturer diversity, part number diversity, foundry diversity, fabrication batch diversity, and/or manufacturing date diversity.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: September 29, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: William E. Villano, Kirk A. Lillestolen
  • Patent number: 10734982
    Abstract: Systems, methods, and apparatus for use in biasing and driving high voltage semiconductor devices using only low voltage transistors are described. The apparatus and method are adapted to control multiple high voltage semiconductor devices to enable high voltage power control, such as power amplifiers, power management and conversion and other applications wherein a first voltage is large compared to the maximum voltage handling of the low voltage control transistors. Timing of control signals can be adjusted via internal and/or external components so as to minimize shoot trough currents in the high voltage devices. A DC/DC power conversion implementation from high input voltage to low output voltage using a novel level shifter which uses only low voltage transistors is also provided. Also presented is a level shifter in which floating nodes and high voltage capacitive coupling and control enable the high voltage control with low voltage transistors.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: August 4, 2020
    Assignee: pSemi Corporation
    Inventors: Buddhika Abesingha, Merlin Green
  • Patent number: 10699175
    Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: June 30, 2020
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Tao Qi, Lijie Zhao, Gustavo James Mehas, Tae Kwang Park, Zhitong Guo, Siqiang Fan
  • Patent number: 10673422
    Abstract: In accordance with an embodiment, a method includes receiving an enable signal. After the enable signal is asserted, it is determined whether a soft-start capacitor is electrically connected to an input of a ramp generator circuit while keeping an output of the ramp generator circuit low. If the soft-start capacitor is electrically connected to the input of the ramp generator circuit, a first current is injected into the input of the ramp generator circuit to generate a first voltage ramp at the output of the ramp generator circuit. If the soft-start capacitor is not electrically connected to the input of the ramp generator circuit, a second current is injected to the input of the ramp generator circuit to generate a second voltage ramp at the output of the ramp generator circuit. The second current is smaller than the first current.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: June 2, 2020
    Assignee: STMICROELECTRONICS S.R.L.
    Inventor: Marco Martini
  • Patent number: 10594209
    Abstract: A switching power converter circuit includes a power switch for operating an inductor to convert the input voltage to the output voltage to drive a load circuit; and a control circuit, including: a pulse width modulation circuit comparing an output related signal with a ramp signal to generate a pulse width modulation signal for controlling the power switch, wherein the output related signal is related to the output voltage; an error amplifier circuit generating an error amplified signal according to a difference between the output related signal and a reference signal; and a ramp signal generation circuit generating the ramp signal, wherein an amplitude of the ramp signal is determined according to the input voltage and the output voltage; and/or the slope of the ramp signal is determined according to the error amplified signal.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: March 17, 2020
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Hsuan-Ju Chen
  • Patent number: 10581318
    Abstract: A power conversion device includes a power conversion circuit that performs switching control of first and second semiconductor switches connected in series and converts an input direct current voltage into an alternating current voltage. A switching adjustment circuit includes a first capacitance addition circuit that increases an output capacitance of the first semiconductor switch. The first capacitance addition circuit includes a first capacitive element and a first switching unit connected in series and is connected in parallel to the first semiconductor switch. A first driving control circuit drives and controls the first capacitance addition circuit. The first driving control circuit turns on the first switching unit when the first semiconductor switch is turned off, increasing the output capacitance of the first semiconductor switch, and turns off the first switching unit when a predetermined time period elapses after the first semiconductor switch is turned off.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: March 3, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuki Ishikura, Koichi Ueki
  • Patent number: 10581326
    Abstract: In an embodiment, a circuit includes a Direct Current (DC)-DC buck-boost converter and a controller. The controller includes an error amplifier configured to receive a feedback signal responsive to an output signal of the buck-boost converter. The error amplifier is configured to compare the feedback signal and a reference signal to generate an error signal. The controller includes a modulator circuit that is configured to receive the error signal and compare the error signal with a periodic ramp signal to generate a modulated signal. The controller further includes a digital logic block to generate switching signals in response to the modulated signal that is fed to the buck-boost converter to control the output signal of the buck-boost converter. The controller includes a capacitance multiplier circuit coupled to the output of the error amplifier to configure a dominant pole so as to compensate the buck-boost converter.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: March 3, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Srinivas Venkata Veeramreddi, Sudhir Polarouthu
  • Patent number: 10498238
    Abstract: The present embodiments relate generally to power controllers, and more particularly to synthetic current hysteretic control of a buck-boost DC-DC controller. In one or more embodiments, a controller includes PFM-PWM and Buck-Boost transitions with minimal circuitry and power consumption. In these and other embodiments, the controller includes a low-Iq synthetic ripple generator for use in implementing hysteretic control of a buck-boost controller.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: December 3, 2019
    Assignee: RENESAS ELECTRONICS AMERICA INC.
    Inventor: Gwilym Francis Luff
  • Patent number: 10491112
    Abstract: A driving circuit and method for buck-boost converter with bootstrap voltage refresh. The driving circuit includes a first bootstrap capacitor provided a first bootstrap voltage to drive the corresponding switch, and a second bootstrap capacitor provided a second bootstrap voltage to drive the corresponding switch. When converter operates in buck mode and the first or second bootstrap voltage is smaller than a threshold, the driving circuit generates current signals to respectively charge the first and second bootstrap capacitors based on an input voltage, and the first and second bootstrap voltages. When converter operates in boost mode and the first or second bootstrap voltage is smaller than the threshold, the driving circuit generates current signals to respectively charge the first and second bootstrap capacitors based on an output voltage, and the first and second bootstrap voltages.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 26, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Lei Li
  • Patent number: 10459467
    Abstract: Disclosed herein is a switching regulator with a soft start circuit for suppressing an in-rush current. The switching regulator includes a peak detector configured to receive a clock signal and detect a peak voltage of the clock signal, a comparator configured to generate a soft start signal for controlling a soft start of the switching regulator based on a result of comparing a level of the peak voltage of the clock signal to a preset reference voltage level, a counter configured to switch a state of the soft start signal at a time point when a preset soft start time arrives, and a ramp voltage generation unit configured to generate a ramp voltage by adjusting a resistance of a variable resistor based on the soft start signal.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: October 29, 2019
    Assignee: FCI INC.
    Inventor: Je Cheol Moon
  • Patent number: 10447932
    Abstract: A driving apparatus for a voice coil motor includes a signal generator configured to generate a path signal determining a path of a driving current provided to the voice coil motor and a current signal determining a level of the driving current, a controller configured to generate a control signal by comparing a reference current determined by the current signal, with the driving current flowing in the voice coil motor, and a driving circuit unit including transistors connected to the voice coil motor, the transistors being configured to form the path of the driving current by performing a switching operation based on the path signal and the control signal.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: October 15, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Patent number: 10439496
    Abstract: A control system for a DC-DC voltage converter includes a microcontroller having first and second applications. The first application commands the microcontroller to generate a first signal that is received at a first pin on a high side integrated circuit to transition a first plurality of FET switches to an open operational state, and that is received at a first pin on the low side integrated circuit to transition a second plurality of FET switches to the open operational state. The second application commands the microcontroller to generate a second signal that is received at a second pin on the high side integrated circuit to transition the first plurality of FET switches to the open operational state, and that is received at a second pin on the low side integrated circuit to transition the second plurality of FET switches to the open operational state.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: October 8, 2019
    Assignee: LG Chem, Ltd.
    Inventor: Kerfegar K. Katrak
  • Patent number: 10411763
    Abstract: A wireless power transmission device comprises a power transmitter and a power receiver. The power transmitter is adapted to convert an input DC power into an electromagnetic energy. The power transmitter includes a wave generating circuit adapted to generate a square wave control signal having a predetermined frequency and a predetermined duty cycle according to the input DC power, a switching control drive circuit configured to convert the input DC power into an alternating electrical signal according to the received square wave control signal, and a first coil coupling circuit configured to convert the alternating electrical signal from the switching control drive circuit into the electromagnetic energy and output the electromagnetic energy. The power receiver is electromagnetically coupled with the power transmitter and adapted to receive the electromagnetic energy from the power transmitter.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: September 10, 2019
    Assignee: Tyco Electronics (Shanghai) Co. Ltd.
    Inventors: Li Zou, Shaoyong Wang, Mingjie Fan
  • Patent number: 10411595
    Abstract: Embodiments of ripple generation devices for a constant on-time voltage regulator and methods for ripple generation for a constant on-time voltage regulator are described. In one embodiment, a ripple generation device for a constant on-time voltage regulator includes a ripple generator configured to generate a ripple signal, a detector operably connected to the ripple generator and configured to detect a difference between an amplitude of the ripple signal and at least one reference amplitude and a feedback controller operably connected to the ripple generator and the detector and configured to generate a control signal for controlling the amplitude of the ripple signal based on the detected difference. Other embodiments are also described.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: September 10, 2019
    Assignee: NXP USA, Inc.
    Inventor: Bin Shao
  • Patent number: 10349481
    Abstract: A DALI interface circuit with bootstrap function, the DALI interface circuit is powered by a power supply circuit, and includes a rectification module, a communication transmitting circuit electrically connected to the rectification module, and a signal input terminal electrically connected to the communication transmitting circuit, the communication transmitting circuit has a MOS transistor Q2 and a bootstrap circuit electrically connected to the MOS transistor Q2. The invention simplifies the solution, reduces components, reduces the cost, and saves space on the circuit board. The communication logic has become simpler and more stable.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: July 9, 2019
    Assignee: Self Electronics Co., Ltd.
    Inventors: Pengyuan Zhao, Xiaobo You
  • Patent number: 10326362
    Abstract: A switching regulator includes a clamp circuit which clamps the output voltage of the error amplifier to the clamp voltage when an output voltage of an error amplifier is higher than a clamp voltage, a constant voltage generation circuit having one end connected to an output terminal of the error amplifier, and a phase compensation capacitor having one end connected to the other end of the constant voltage generation circuit, and the other end connected to a ground terminal. When the clamp circuit clamps the output voltage of the error amplifier, the constant voltage generation circuit lowers the voltage at one end of the phase compensation capacitor by a prescribed voltage. When the clamped state of the output voltage of the error amplifier is released, the constant voltage generation circuit lowers the voltage of the output terminal of the error amplifier from the clamp voltage by the prescribed voltage.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 18, 2019
    Assignee: ABLIC INC.
    Inventor: Kosuke Takada
  • Patent number: 10324877
    Abstract: USB controllers, systems and methods are presented to conserve power in a USB controller, in which a transmitter transmits data to a line of a connected USB cable according to a transmit data signal, and a pull down circuit selectively sinks current from a supply node of the transmitter when the transmit data signal is in a first state, refrains from sinking the first current from the supply node when the transmit data signal is in a different second state.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: June 18, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Hassan Pooya Forghani-Zadeh, Byungchul Jang, Erick Torres, Timothy Bryan Merkin
  • Patent number: 10305379
    Abstract: A control circuit for compensating output loss of a power converter includes a sampling voltage generator, a time-to-voltage converter, and a compensation signal generator. The sampling voltage generator generates a sampling voltage corresponding to a detection voltage according to a first reference current, a second reference current, and the detection voltage. The time-to-voltage converter generates a corresponding voltage according to a period of a gate control signal controlling a power switch of a primary side of the power converter and a discharge time of a secondary side of the power converter. The compensation signal generator generates a compensation signal compensating the output loss according to the sampling voltage and the corresponding voltage.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 28, 2019
    Assignee: Leadtrend Technology Corp.
    Inventors: Hsin-Hung Lu, San-Yi Li
  • Patent number: 10291119
    Abstract: A control circuit for a switching power includes a driver unit that receives an error signal outputted from an error amplifier and generates driving pulses to be applied to a power semiconductor switching device on the basis of the error signal; a short-circuit detection circuit that determines whether a short-circuit occurs between a feedback terminal and a comp terminal of the control circuit; a holding circuit that holds the error signal; and a switching circuit, wherein when the short-circuit detection circuit determines that the short-circuit occurs, the switching circuit provides an error signal held by the holding circuit prior to the detection of the short-circuit to the driver unit instead of the error signal outputted from the error amplifier so that the driver unit does not generate the driving pluses based on the error signal outputted from the error amplifier when the short-circuit is determined to have occurred.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: May 14, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Yukihiro Yaguchi
  • Patent number: 10289136
    Abstract: A converting apparatus includes: a driving device arranged to charge a connecting terminal by a charging signal and to discharge the connecting terminal by a discharging signal for generating a driving signal; a filtering device coupled to the connecting terminal for generating an output voltage according to the driving signal; and a controlling device coupled to the connecting terminal, for receiving the driving signal to generate a control signal. The driving device is arranged to generate the charging signal and the discharging signal according to the control signal. A method of generating an output voltage includes the steps of generating a driving signal; filtering the driving signal to generate the output voltage; receiving the driving signal to generate a control signal; and generating the charging signal and the discharging signal according to the control signal.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: May 14, 2019
    Assignee: ALPHA AND OMEGA SEMICONDUCTORE (CAYMAN) LTD.
    Inventor: Wei-Cheng Tu
  • Patent number: 10284082
    Abstract: A power supply control circuit is connected to and controls a system power supply IC. The system power supply IC has multiple power supply circuits and is capable of outputting multiple power supply voltages. The system power supply IC activates the multiple power supply circuits at one time using a common enable signal. The power supply control circuit includes a gate circuit and a first switch unit. The gate circuit generates the common enable signal based on a control signal and a selection signal. The control signal is output from a control device during a usual operation. The selection signal is a signal that selects one of the multiple power supply circuits which is required to output the power supply voltage. The first switch unit is driven by a power-on signal during system activation, and switches on or off the selection signal input to the gate circuit.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: May 7, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takahiro Sumiyoshi, Manabu Hirauchi
  • Patent number: 10276084
    Abstract: A circuit has a variable output that changes an output of a fixed input inversion amplification circuit, which includes a first operation amplifier with one input terminal that is applied with a fixed input value. The circuit includes an intermediate inversion amplification circuit having a second operation amplifier with an output terminal that is connected to another input terminal of the operation amplifier included in the fixed input inversion amplification circuit. One input terminal of the second operation amplifier is applied with the same input value as the fixed input value applied to the one input terminal of the first operation amplifier. Another input terminal of the second operation amplifier is applied with a variable input corresponding to an output of the first operation amplifier.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: April 30, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Shin Hye Chun, Dong Gyun Woo, Gyu Tae Choi
  • Patent number: 10263521
    Abstract: Various methods and devices that involve control circuits for power converters are disclosed. One method comprises controlling a switch using a control signal based on a comparison signal. The switch controls a transfer of power between an input node, which receives an input, and an output node. The method comprises measuring an output of the power converter, generating an error signal based on the output, generating a periodic ramp signal with a varying period, providing the error signal to a first input terminal of a comparator, providing the ramp signal to a second input terminal of the comparator, and generating the comparison signal based on the error signal and the ramp signal using the comparator. The method comprises increasing a slope of the ramp signal in response to an increase in the input, and increasing the slope of the ramp signal in response to a decrease in the varying period.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: April 16, 2019
    Assignee: Silanna Asia Pte Ltd
    Inventor: Trevor M. Newlin
  • Patent number: 10263528
    Abstract: A resonant converter with adaptive switching frequency operates continuously at best efficiency point. A power switch at primary side is turned off when a current flowing through a corresponding output power stage at secondary side falls to zero.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: April 16, 2019
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Qian Ouyang
  • Patent number: 10250145
    Abstract: A circuit includes a timer circuit configured to generate a first control signal defining a first time period and a second control signal defining a second time period. A controller is configured to control a high-side and a low-side transistor of a half-bridge circuit in response to the first and second control signals only during a first switching cycle of the half-bridge circuit. The half-bridge circuit includes a bootstrap capacitor coupled to a node between the high-side and low-side transistors. The controller turns on the low-side transistor for the first time period during the first switching cycle and configured turns off the low-side and the high-side transistors for the second time period during the first switching cycle.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: April 2, 2019
    Assignee: STMicroelectronics S.r.l.
    Inventors: Claudio Adragna, Aldo Vittorio Novelli, Christian Leone Santoro
  • 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
  • Patent number: 10170993
    Abstract: A control system for a DC-DC voltage converter includes a microcontroller having first and second applications. The first application commands the microcontroller to generate a first signal that is received at a first pin on a high side integrated circuit to transition a first plurality of FET switches to an open operational state, and that is received at a first pin on the low side integrated circuit to transition a second plurality of FET switches to the open operational state. The second application commands the microcontroller to generate a second signal that is received at a second pin on the high side integrated circuit to transition the first plurality of FET switches to the open operational state, and that is received at a second pin on the low side integrated circuit to transition the second plurality of FET switches to the open operational state.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: January 1, 2019
    Assignee: LG Chem, Ltd.
    Inventor: Kerfegar K. Katrak
  • Patent number: 10158224
    Abstract: An exemplary apparatus provides a regulated DC voltage output from an input from supply DC voltage source. A regulation circuit having an input terminal coupled to the supply DC voltage source, an output terminal on which is provided the regulated DC voltage output, and a current control terminal capable of controlling a maximum current that can flow through the regulation circuit where a level of maximum current is controlled proportionate to an amount of resistance connected to the current control terminal. A surge control circuit connected to the current control terminal automatically supplies a variable resistance beginning with one resistance at turn-ON and varying to another resistance at a predetermined time interval after turn-ON to limit the current that can flow at turn-ON until a steady state of the regulation circuit is reached.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: December 18, 2018
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Ding C. Woo
  • Patent number: 10141845
    Abstract: Disclosed examples provide DC-DC converters and control circuits to provide high and low-side driver signals and to selectively adjust a delay time between a low-side switching device turning off and a high-side switching device turning on according to a comparator signal, including a clocked comparator circuit referenced to a switching node to sample the voltage across the high-side switching device in response to a first edge of the high-side driver signal, and to generate the comparator signal indicating a polarity of the sampled high-side switch voltage to facilitate zero voltage switching of the high-side switching device.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 27, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Saurav Bandyopadhyay, Robert A. Neidorff
  • Patent number: 10135341
    Abstract: A switch-mode power supply includes a transformer, a power transistor, pulse generation circuitry, and a dual ramp modulation (DRM) circuit. The power transistor is coupled to a primary coil of the transformer. The pulse generation circuitry is configured to generate a power transistor activation signal. The DRM circuit is coupled to the pulse generation circuitry. The DRM circuit is configured to generate a leading edge blank time signal that disables inactivation of the power transistor activation signal for a predetermined interval (a leading edge blank time) after a leading edge of the power transistor activation signal. The DRM circuit is also configured to generate a reset signal that inactivates the power transistor activation signal while the leading edge blank time signal is activated.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 20, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pei-Hsin Liu, Richard Lee Valley
  • Patent number: 10126770
    Abstract: A voltage regulator for driving a digital circuit includes an input terminal and an output terminal, a pass device and a first capacitor, and a boost circuit connected to the pass device or to the first capacitor and having a regulator boost input terminal connectable to the boost signal output terminal. The output terminal is connectable to a power terminal of a digital or switching circuit having at least a boost signal output terminal. The boost circuit includes a boost capacitor and a switching arrangement connected to the regulator boost input terminal and connected to the boost capacitor. The switching arrangement is controllable by a boost signal generated by the digital or switching circuit.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: November 13, 2018
    Assignee: EM Microelectronic-Marin SA
    Inventor: Jiri Nerad
  • Patent number: 10122378
    Abstract: A digital-to-time converter includes: a digital-to-analog converter configured to generate a precharge voltage corresponding to a value of a digital code; a ramp generator configured to precharge a capacitor connected to a first node based on the precharge voltage, and to charge or discharge the capacitor based on a reference current provided from a current source in response to a transition of an input clock signal to generate a ramp voltage in the first node; and a comparator configured to generate an output clock signal based on the ramp voltage, wherein the ramp generator includes: a first switching circuit configured to provide a first current path between a second node connected to the current source and the first node; and a second switching circuit configured to provide a second current path from a power supply voltage source to the second node.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: November 6, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Nam-seog Kim
  • Patent number: 10116207
    Abstract: A switching power converter with a hysteretic current-mode controller switches at a fixed frequency responsive to a pulse generator that pulses a set signal and a reset signal at the fixed frequency. A power switch in the switching power converter is configured to close responsive to the pulsing of the set signal and to open responsive to the pulsing of the reset signal.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 30, 2018
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventor: Andrey Malinin
  • Patent number: 10116222
    Abstract: Disclosed examples include synchronous rectifiers and flyback converters, integrated circuits and operating methods, in which a first switch is turned on to allow current to flow for a first time period in a first direction in a transformer primary winding responsive to a first switch voltage transitioning below a first threshold, and a second switch is turned on for a second time period after the first time period to transfer energy from a secondary transformer winding to drive a load. In the same converter cycle, the second switch is again turned on for a third time period in response to a second switch voltage transitioning below a second threshold at one of a series of troughs of a resonant ringing voltage waveform across the second switch, to cause current flow in a second direction in the primary winding to discharge a capacitance of the first switch to cause the first switch voltage to transition below the first threshold to initiate a subsequent converter cycle.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: October 30, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Isaac Cohen
  • Patent number: 10114046
    Abstract: A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (SMPS) at substantially the middle of the low side portion (50 percent point during low side switch ON) of the pulse width modulation (PWM) period. This sample of the current through the SMPS inductor during the low side ON 50% point may be considered as the “average” or “DC output” current of the SMPS, and taken every time at precisely the same low side ON 50%. A constant current source and sink are used to charge and discharge a timing capacitor whose voltage charge is monitored by a high speed voltage comparator to provide precise sample timing.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: October 30, 2018
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Scott Dearborn, Cliff Ellison
  • Patent number: 10110112
    Abstract: A controller, and related method, configured to generate a duty cycle control signal for controlling an output voltage of a switched mode power supply as a function of a reference signal. In one embodiment, the controller is configured to sample a signal indicative of the output voltage to generate a first sampled signal, filter out a ripple component of the first sampled signal to generate a filtered signal, and generate a feedback control signal based on the filtered signal. The controller is also configured to sample a signal indicative of an input voltage of the switched mode power supply to generate a second sampled signal, generate a feed-forward control signal based on the second sampled signal and a feed-forward reference voltage, and generate the duty cycle control signal based on the feedback control signal and the feed-forward control signal.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: October 23, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Magnus Karlsson, Torbjorn Holmberg, Andreas Larsson
  • Patent number: 10075070
    Abstract: A pulse generator includes a mode controller that detects a state in which there has been no transition of a pulse signal to the off level for a given cycle (period). When such a state is detected, the pulse generator transits to a skip mode. In the skip mode, the period is repeatedly switched between: (i) a first period in which the pulse signal is maintained at the on level over multiple cycles; and (ii) a second period in which the pulse signal is forcibly switched to the off level so as to charge the bootstrap capacitor by means of a bootstrap circuit.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: September 11, 2018
    Assignee: ROHM CO., LTD.
    Inventors: Takeru Matsuki, Koichi Miyanaga
  • Patent number: 10075074
    Abstract: In a controller for a DC to DC converter, PWM signal generating circuitry generates a set of PWM signals phase-shifted relative to one another, and controls states of the PWM signals according to a set of control signals. Each PWM signal of the PWM signals has an on-time state and an off-time state. Ramp signal generating circuitry, coupled to the PWM signal generating circuitry, generates a set of ramp signals having substantially the same ramp slope. Each ramp signal of the ramp signals is generated in response to detecting an on-time state of a corresponding PWM signal of the PWM signals. Additionally, a comparing circuit, coupled to the PWM and ramp signal generating circuitry, alternately compares the ramp signals with a preset reference to generate the control signals. A corresponding control signal of the control signals changes the corresponding PWM signal from the on-time state to an off-time state.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: September 11, 2018
    Assignee: O2Micro, Inc.
    Inventors: Gang Li, Fengjiang Zhang, Guoyong Guo
  • Patent number: 10038437
    Abstract: Disclosed is a high voltage power system with enable control, comprising a high voltage start-up circuit, a PWM control module, and a driving module; the high voltage start-up circuit comprises a first transistor, a third transistor, a fourth transistor, a resistor, a diode, a VDD detection unit and an I/O interface unit; the high voltage start-up circuit is controlled by an input of a pin EN; when the pin EN is set, the high voltage start-up circuit stops working; the power system is shut off and doesn't restart, and enters a zero standby state; when the pin EN is reset, the high voltage start-up circuit restores to work, and the power system restarts and enters a normal working state. The power system having the high voltage start-up circuit with enable control has characteristics that the standby input power consumption and standby input current are both close to zero.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: July 31, 2018
    Assignee: WUXI CHIPOWN MICRO-ELECTRONICS LIMITED NEW DISTRICT
    Inventors: Haisong Li, Changshen Zhao, Yangbo Yi, Wenliang Liu, Zhijun Wu
  • Patent number: 9966864
    Abstract: An electronic apparatus includes a converting circuit and a first control circuit. The converting circuit converts an input voltage to an output voltage. The first control circuit compares a feedback signal representing the output voltage with a target voltage to generate an error voltage. When the electronic apparatus is on a starting-up status and the error voltage is not greater than a threshold voltage, the first control circuit outputs a first driving signal to drive the converting circuit according to the error voltage. When the electronic apparatus is on a starting-up status and the error voltage is greater than the threshold voltage, the first control circuit stops outputting the first driving signal. A frequency of the first driving signal is determined according to the error voltage.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 8, 2018
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Tie Chen, Jun-Lai Huang, Hui Huang, Yun-Peng Dong, Lei Cai
  • Patent number: 9954440
    Abstract: According to at least one aspect, a circuit for controlling a power converter including an inductor having a terminal coupled to a supply voltage by a switch is provided. The circuit includes a detector configured to detect voltage transient events in an output voltage of the power converter and generate a control signal based on the detected voltage transient events and a control signal generator configured to receive the control signal and control operation of the switch based on the control signal at least in part by varying an on-time of the switch during the voltage transient events and holding the on-time of the switch constant when no transient event is detected by the detector.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 24, 2018
    Assignee: MediaTek Inc.
    Inventor: HuaChiang Huang
  • Patent number: 9902285
    Abstract: A power net system for a fuel cell vehicle includes: a diode having a first end connected to an output stage of a fuel cell stack; a fuel cell load device branched and connected between the output stage of the fuel cell stack and the diode; a first relay positioned between the output stage of the fuel cell stack and the fuel cell load device and configured to connect or separate the output stage of the fuel cell stack and the fuel cell load device; and a second relay having a first end connected to a second end of the diode and a second end connected between the first relay and the fuel cell load device.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: February 27, 2018
    Assignee: Hyundai Motor Company
    Inventors: Sang Uk Kwon, Nam Woo Lee
  • Patent number: 9893621
    Abstract: Various methods and devices that involve control circuits for power converters are disclosed. One method comprises controlling a switch using a control signal based on a comparison signal. The switch controls a transfer of power between an input node, which receives an input, and an output node. The method comprises measuring an output of the power converter, generating an error signal based on the output, generating a periodic ramp signal with a varying period, providing the error signal to a first input terminal of a comparator, providing the ramp signal to a second input terminal of the comparator, and generating the comparison signal based on the error signal and the ramp signal using the comparator. The method comprises increasing a slope of the ramp signal in response to an increase in the input, and increasing the slope of the ramp signal in response to a decrease in the varying period.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: February 13, 2018
    Assignee: Silanna Asia Pte Ltd
    Inventor: Trevor M. Newlin
  • Patent number: 9894309
    Abstract: A ramp signal generator may include a reference current generation unit suitable for generating a reference current based on a gain; a ramp signal generation unit suitable for generating a ramp signal according to the reference current; a replica current supply unit suitable for supplying a replica current using the reference current generation unit; and an offset compensation unit suitable for compensating for an offset of the ramp signal generated by the ramp signal generation unit using the replica current.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: February 13, 2018
    Assignee: SK Hynix Inc.
    Inventor: Gun-Hee Yun