With Starting Arrangement Patents (Class 363/49)
  • Patent number: 9298288
    Abstract: A driving apparatus of a display panel comprises a display panel for displaying an image according to an image signal; a DC-DC converter configured to output a voltage supplied from an external power source as a driving power source voltage for driving the display panel; a signal controller configured to generate a power supply enable signal for controlling an operation of the DC-DC converter and transfer it to the DC-DC converter; and a driving controller configured to determine an operation of the DC-DC converter according to a state of the driving power source voltage by receiving the driving power source voltage and comparing the received driving power source voltage with a pulse voltage of the power supply enable signal, and drive the DC-DC converter by adjusting the power supply enable signal in case the DC-DC converter is not operated.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: March 29, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sung-Cheon Park
  • Patent number: 9268280
    Abstract: The heating apparatus includes a first detection part which detects whether or not the power supplied to the heat generation member is in an overpower state by detecting a positive phase of a half wave in an alternating voltage of a commercial power supply applied to the first or the second current path of the heat generation member, a second detection part which detects whether the power supplied to the heat generation member is in an overpower state or not by detecting a negative phase of a half wave in an alternating voltage the commercial power supply applied to the first current path or the second current path of the heat generation member, and a control part which controls itself to stop supplying power from the commercial power supply to the heat generation member in a case where an overpower state is detected by the first or second detection part.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: February 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuhiro Shimura
  • Patent number: 9263951
    Abstract: A converter arrangement (C.5, C.7, C.8, C.9, C.11, C.12) with at least two single LLC converters (L), a pulse generator (2) per single LLC converter (L) wherein each pulse generator (2) is configured to supply switching pulses to one single LLC converter (L) and an output controller (11) configured to use switching frequency control and/or phase-shift control to control the pulse generators (2) comprises a load balancing control (7.5, 7.7, 7.8, 7.9, 7.11, 7.12) for overcoming unbalanced loading of the converter arrangement (C.5, C.7, C.8, C.9, C.11, C.12).
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: February 16, 2016
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Heiko Figge, Frank Schafmeister, Tobias Grote
  • Patent number: 9197125
    Abstract: Damage to an inverter due to an excessively high start-up current, when using space vector control without a voltage sensor in conjunction with small connection inductances, can be prevented with a method for controlling the inverter, and with a corresponding controller, wherein the controller is configured to transmit in a start-up phase of an inverter circuit a control signal to a control input of the inverter circuit, wherein the control signal simultaneously switches three first semiconductor switches, which are connected to a first DC voltage terminal of the inverter circuit, temporarily into a conducting state.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 24, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bachmaier, Christian Bachmann, Dominik Bergmann, Matthias Gerlich, Mirjam Mantel, Guillaume Pais
  • Patent number: 9166435
    Abstract: Improvements in a battery de-sulfating device are disclosed. The improvements including a plurality of capacitive discharge channels selectively activatable by a control board to provide a pulse wave modulated de-sulfating current to a lead-acid battery. The de-sulfating current can be a variable, or harmonic, repeating pattern of about 0.1-1.5 ms ON pulse followed by an about 2-9 ms OFF period which may be applied to the battery at an operator-adjustable peak amperage of about 0-350 amps. The de-sulfation process before, during or after the normal battery charging cycle, or any combination thereof. The temperature of the battery and the specific gravity of the fluid within the battery is measure during the de-sulfating process. The extent of sulfation of the battery may be ascertained by measuring the impedance of the battery.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: October 20, 2015
    Inventor: Bruce Eric Zeier
  • Patent number: 9166493
    Abstract: A power converter circuit includes a diode group, a relay, a DC section and an inverter. The diode group includes a plurality of diodes arranged to rectify an output voltage of an alternating-current power supply. The relay is provided at a point located closer to the alternating-current power supply than the diode group. The DC section is where an output voltage of the diode group is applied. The inverter is arranged to output a three-phase alternating-electric current to a three-phase load. The DC section has a maximum pulse voltage twice as great as a minimum pulse voltage of the DC section. The DC section includes an energy-absorbing circuit having an electrolytic capacitor. The DC section further has a pathway arranged to apply the output voltage of the alternating-current power supply from the alternating-current power supply to the electrolytic capacitor via a rectifying circuit, not via the relay.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: October 20, 2015
    Assignee: Daikin Industries, Ltd.
    Inventors: Morimitsu Sekimoto, Toshiyuki Maeda
  • Patent number: 9160227
    Abstract: An electronic apparatus is removed from a power supply apparatus and that can be certified by detecting a secondary-side transformer coil by a no-load detecting unit. The no-load detecting unit is configured to turn off an output switch unit and a power factor correction and pulse width modulation controller. An intermittent driving unit is configured to drive a start unit once a pre-determined time. The start unit is configured to drive the power factor correction and pulse width modulation controller. A load detecting unit is configured to detect that the electronic apparatus is connected to the power supply apparatus. The load detecting unit is configured to drive the intermittent driving unit. The intermittent driving unit is configured to drive the start unit. The start unit is configured to drive the power factor correction and pulse width modulation controller.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: October 13, 2015
    Assignee: Chicony Power Technology Co., Ltd.
    Inventor: Fu-Chuan Chen
  • Patent number: 9148050
    Abstract: An AC/DC converting circuit and a starting method thereof are provided. An AC detection or a rectified AC voltage detection is disabled when the AC voltage or the rectified AC voltage not up to a start-up voltage is detected, so as to shorten a recovery time of a voltage of a power supply terminal of an AC/DC power conversion controller, and further shorten a starting time of the AC/DC converting circuit.
    Type: Grant
    Filed: July 14, 2013
    Date of Patent: September 29, 2015
    Assignee: Power Forest Technology Corporation
    Inventor: Yun-Chi Chiang
  • Patent number: 9148049
    Abstract: A discharge circuit for an EMI filter capacitor, wherein the EMI filter capacitor is coupled between input terminals of a switching converter. The discharge circuit has a detecting circuit and a current source. The detecting circuit is configured to detect whether an electrical source is coupled to the input terminals of the switching converter. The current source is coupled between the input terminals of the switching converter and a power supply capacitor, and is configured to provide a power supply voltage across the power supply capacitor. When the electrical source is uncoupled from the input terminals of the switching converter, the EMI filter capacitor is discharged by the current source.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: September 29, 2015
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: En Li
  • Patent number: 9143036
    Abstract: Provided is a power supply for use in a solar electric production system, including: a first stage having an input connected to a voltage from a photovoltaic panel and an output providing a first voltage different from the voltage from the photovoltaic panel; and a second stage connected to the output of the first stage, the second stage supplying power at a second voltage to a micro-controller, where the output of the first stage is turned on and stable for a period of time before the second stage is turned on to supply the power at the second voltage to the micro-controller.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: September 22, 2015
    Assignee: TIGO ENERGY, INC.
    Inventor: Mordechay Avrutsky
  • Patent number: 9130450
    Abstract: A power supply system includes: a switching power supply, which rectifies and smoothes an AC voltage of an AC power supply to generate a first DC voltage in a normal mode; a control unit, which controls the switching power supply to switch between the normal mode and a power saving mode; and a low-capacity power supply circuit, which supplies power to the control unit in the power saving mode, and which includes: a first capacitor, which includes a first electrode connected to one end of the AC power supply, and a second electrode; a second capacitor, which includes a first electrode connected to the other end of the AC power supply, and a second electrode; a rectifying circuit, which rectify an AC voltage applied to both capacitors; and a smoothing circuit, which smoothes the rectified AC voltage to generate a smooth voltage.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: September 8, 2015
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Katsumi Inukai
  • Patent number: 9130464
    Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: September 8, 2015
    Assignee: RICHTEK TECHNOLOGY CORP.
    Inventors: Jyun-Che Ho, Jiun-Hung Pan, Chien-Fu Tang, Isaac Y. Chen
  • Patent number: 9121907
    Abstract: A switch failure detection device includes a switch, a rectifier, a switch voltage detection circuit, and a controller. The switch is connected in a path in which a charging current to and a discharging current flow. The rectifier passes a discharging current by bypassing the switch when the switch is turned off. The detection circuit detects a voltage between an input and an output of the switch. The controller is configured to: determine whether the electric storage device is in a discharging state; send an off-command signal to the switch if the electric storage device is in the discharging state; receive the voltage; determine an input-output voltage of the switch based on the voltage; determine whether the input-output voltage is lower than a first reference voltage; and determine the switch has a turn-off problem if the input-output voltage is lower than the first reference voltage.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: September 1, 2015
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Takeyuki Shiraishi, Takeshi Itagaki
  • Patent number: 9106105
    Abstract: A converter unit configured to couple to a photovoltaic panel (PV) may include a controller to sense an output voltage and output current produced by the photovoltaic panel, and manage the output voltage of a corresponding power converter coupled to a DC bus to regulate the resultant bus voltage to a point that reduces overall system losses, and removes non-idealities when the panels are series connected. The controller may also adapt to output condition constraints, and perform a combination of input voltage and output voltage management and regulation, including maximum power point tracking (MPPT) for the PV. The output voltage and output current characteristic of the power converter may be shaped to present a power gradient—which may be hysteretically controlled—to the DC bus to compel an inverter coupled to the DC bus to perform its own MPPT to hold the DC-bus voltage within a determinate desired operating range.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: August 11, 2015
    Assignee: Draker, Inc.
    Inventors: Shawn R. McCaslin, Sam B. Sandbote, Bertrand J. Williams
  • Patent number: 9088231
    Abstract: A method of implementing a remedial short in a rotating polyphase electric machine (EM) includes detecting a fault condition; and initially commanding a power inverter module (PIM) into an electrically-open state. Once in an open state, a controller may determine a phase angle of a current generated by the rotating EM, and may control the PIM to apply a voltage to the EM that is out-of-phase from the determined phase angle of the generated current. The magnitude of the applied voltage signal may ramped from a first voltage to zero over a period of time; whereafter the PIM may be commanded to electrically couple all of the electrical windings of the EM to each other.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: July 21, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Steven E. Schulz
  • Patent number: 9048747
    Abstract: A startup circuit delivers regulated startup current to a control IC in a switched-mode power supply (SMPS) system, and automatically disconnects the startup current when the SMPS Control IC starts switching the transformer or inductor used as the energy storage element in the SMPS system. Disconnection of the startup current may be triggered by detecting a time-varying voltage waveform on an accessible node in the SMPS system, or by detecting an increased current consumption by the SMPS Control IC, without requiring any ground reference to the SMPS Control IC, nor without requiring any logic signals generated by the SMPS Control IC. This provides for rapid and predictable startup of an SMPS Control IC and reduced power loss once the SMPS Control IC is operational, and is independent of the operating voltages of the SMPS control IC, and independent of the particular control scheme and switch topology of the SMPS system.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: June 2, 2015
    Inventor: Zahid Ansari
  • Patent number: 9048654
    Abstract: Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: June 2, 2015
    Assignee: Georgia Tech Research Corporation
    Inventor: Deepakraj Divan
  • Patent number: 9048745
    Abstract: During startup of a DC/DC converter having a high-frequency transformer whose primary winding is supplied with current from an input-side DC link via an inverter bridge having pulsed switches and whose secondary winding is used to charge an output-side DC link via a rectifier bridge. The switches of the inverter bridge are operated to load the output-side DC link, in a manner that deviates from a normal operation of the switches in order to limit the currents that flow in the DC/DC converter during startup of the DC/DC converter. Particularly, the switches of the inverter bridge are operated during startup of the DC/DC converter at a pulse width that is fixed during each of a limited number of stages of the startup, and have a duty cycle that is not more than 5 percent during each of the stages of the startup.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: June 2, 2015
    Assignee: SMA Solar Technology AG
    Inventors: Christian Seel, Lars Bethke
  • Patent number: 9041245
    Abstract: A power supply apparatus includes a converter to convert AC power into DC power, an SMPS to convert the DC power into DC powers desired by loads, a capacitor to interconnect the converter and the SMPS, a PTC element connected to the converter, a first switch connected in parallel with the PTC element, and a second switch connected in series with the first switch. The method includes turning on the second switch to start charging of the capacitor, turning on the first switch to charge the capacitor to a target voltage level, and turning off both the first switch and second switch if a voltage across the capacitor rises over the target voltage level, to discharge the voltage across the capacitor so as to lower the voltage across the capacitor to the target voltage level or lower.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Yoon, Dae Hyun Lim, Joong Ki Moon, Sung Wook Kang
  • Patent number: 9042135
    Abstract: Methods and apparatuses for a soft-start function with auto-disable are described. Such methods and apparatuses can gradually increase a voltage towards a reference voltage using a ramp generator and a control loop and can disable the ramp generator and the control loop once the voltage has reached the reference voltage.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: May 26, 2015
    Assignee: Peregrine Semiconductor Corporation
    Inventor: Gary Chunshien Wu
  • Publication number: 20150137691
    Abstract: The invention discloses a half-bridge inverter which includes first and second inverter input terminals for receiving a direct current (DC) voltage, first and second inverter switches, first and second drive circuits, and an inverter startup circuit. The first and second drive circuits are adapted to alternatively turn on and turn off the first and second inverter switches, which can convert the DC voltage to a high frequency alternating current (AC) voltage. The inverter startup circuit includes a capacitor, diode, and resistor. The capacitor and diode are connected in parallel and further electrically connected in a drive circuit in series. The resistor is electrically coupled to the first inverter input terminal and to the capacitor/diode parallel combination. The inverter startup circuit is used to trigger the first or second inverter switch. An electronic ballast containing the half-bridge inverter and a lighting device containing said electronic ballast are also disclosed.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Inventors: Chenghua ZHU, Kai ZHUANG, Bing ZHANG
  • Patent number: 9036369
    Abstract: Methods and apparatuses for programming a parameter value in an IC (e.g., any power electronic device, such as a controller of a power converter) are disclosed. The parameter can be selected/programmed by selecting a clamp using an external optional (selectively inserted) diode coupled to a multi-function programming terminal. In particular, a controller IC for a power converter can be externally programmed via one or more multiple function terminals during startup of the converter to select between two or more options using the external programming terminal(s). Once programming is complete, internal programming circuitry may be decoupled from the programming terminal and during normal operation the programming terminal may then be used for another function, such as a bypass (BP) terminal to provide a supply voltage to the IC or other required functionalities.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: May 19, 2015
    Assignee: Power Integrations, Inc.
    Inventors: Robert Mayell, Yury Gaknoki, Mingming Mao
  • Publication number: 20150131343
    Abstract: A boost PFC converter includes a rectifier, a converter and an output stage comprising an output capacitor where the DC output voltage is provided across the output capacitor. The rectifier includes four rectifying elements connected in a full bridge configuration where the upper two of these four rectifying elements are thyristors and where the lower two are diodes. In that the thyristors are controlled such as to be open for only a part of each half period of the input voltage, the amount of current per half period that is passed to the output capacitor is controllable and can be made very small. Accordingly, the charge current for precharging the output capacitor can be controllably limited such that a bulky precharge resistor is not required anymore to avoid high inrush currents.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 14, 2015
    Applicant: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Michael HUFNAGEL, Frank SCHAFMEISTER
  • Patent number: 9030855
    Abstract: A semiconductor device, a start-up circuit, and an operating method for the same are provided. The start-up circuit comprises a semiconductor unit, a first circuit, a second circuit, a voltage input terminal and a voltage output terminal. The first circuit is constituted by one diode or a plurality of diodes electrically connected to each other in series. The second circuit is constituted by one diode or a plurality of diodes electrically connected to each other in series. The semiconductor unit is coupled to a first node between the first circuit and the second circuit. The voltage input terminal is coupled to the semiconductor unit. The voltage output terminal is coupled to a second node between the semiconductor unit and the first circuit.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: May 12, 2015
    Assignee: Macronix International Co., Ltd.
    Inventors: Wing-Chor Chan, Chih-Min Hu, Li-Fan Chen
  • Patent number: 9025349
    Abstract: A power system and a starting method thereof includes a power output circuit, a loop circuit, a soft start circuit, and a constant-current source that supplies power to the soft start circuit. The loop circuit includes a loop circuit capacitor. The power system further includes a precharge circuit that charges the loop circuit capacitor, and the precharge circuit charges the loop circuit capacitor when the soft start circuit charges the power output circuit.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: May 5, 2015
    Inventor: Xiang Yang
  • Patent number: 9000742
    Abstract: A signal generating circuit includes: a first signal amplifying circuit arranged to generate a first amplified signal according to a first supply current, a reference signal, and an output signal of the signal generating circuit; a soft-start circuit arranged to generate a control signal according to a soft-start signal; a current controlled circuit arranged to generate the first supply current according to the soft-start signal; and a pass transistor arranged to generate an output signal according to an error amplified signal and the control signal. The error amplified signal is derived from the first amplified signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 7, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Xi Chen, Chien-Wei Kuan
  • Patent number: 8995152
    Abstract: An inverter circuit 40 with reduced loss in semiconductor elements when starting up, having switching elements Q1 and Q2 in series, and connected to both ends of a direct current power source circuit 30 having direct current power sources Psp and Psn in series, and including an alternating current output terminal U connected to a connection point of the switching elements, an alternating current output terminal V connected to a connection point of the direct current power sources, a bidirectional switch element S1, connected between the alternating current output terminal U and a terminal R of an alternating current power source 1, and a bidirectional switch element S2, connected between the alternating current output terminal U and a terminal S of the alternating current power source, causing the bidirectional switch elements to turn on and off when starting up.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: March 31, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Seitaro Banno, Satoru Fujita
  • Patent number: 8975883
    Abstract: A soft start circuit includes an error amplifier for generating a control signal according to an input voltage, a feedback voltage and a reference voltage, a feedback circuit for generating the feedback voltage according to an output voltage, an internal voltage source for generating a soft start voltage, and a sink circuit including a first transformation module for generating a first transformation current according to the soft start voltage, a second transformation module for generating a second transformation current according to the feedback voltage, a comparison module coupled to the first transformation module and the second transformation module for generating a comparison result according to the first transformation current and the second transformation current, and an output module coupled to the comparison module for generating a sink current according to the comparison result, so as to control the control signal.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 10, 2015
    Assignee: Anpec Electronics Corporation
    Inventors: Chih-Ning Chen, Yen-Ming Chen
  • Patent number: 8976549
    Abstract: A startup circuit with reduced power dissipation, method of operating the same and a power converter employing the startup circuit. In one embodiment, the startup circuit for a controller includes a charge accumulation circuit having a resistor series-coupled to a capacitor and a first Schmitt trigger having an input coupled to the capacitor. The startup circuit also includes a second Schmitt trigger having an input coupled to an output of the first Schmitt trigger and configured to provide a bias voltage for the controller via the capacitor when an input voltage thereto exceeds a trip voltage.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: March 10, 2015
    Assignee: Power Systems Technologies, Ltd.
    Inventor: Ralf Schroeder genannt Berghegger
  • Patent number: 8976559
    Abstract: Disclosure includes control methods and power controllers with load compensation adapted for a power supply powering a load. A disclosed power controller comprises a converter and a control circuit. The converter converts the load signal at a first node to output a load-compensation signal at a second node. The load signal corresponds to an output power provided from the power supply to the load, and the converter includes a low-pass filter coupled between the first and second nodes. The control circuit is coupled to an inductive device via a feedback node, for controlling the output power to make a cross voltage of the inductive device approach a target voltage, based on a feedback voltage at the feedback node. The higher the load-compensation signal the higher the target voltage.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: March 10, 2015
    Assignee: Leadtrend Technology Corporation
    Inventors: Yi-Lun Shen, Ren-Yi Chen, Yu-Yun Huang
  • Patent number: 8971069
    Abstract: In one embodiment, an input capacitor balancing circuit for a power supply is provided. The circuit includes an input capacitance operable to filter input power for the power supply. The input capacitance has a first capacitor and a second capacitor coupled in series between an input voltage and a first node. A voltage divider circuit is coupled to the input voltage and operable to generate a divided voltage therefrom. A buffer circuit is operable to receive the divided voltage and, if the first capacitor and the second capacitor are not balanced, to provide current to the input capacitance to balance the first capacitor and the second capacitor.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: March 3, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Richard A. Dunipace
  • Patent number: 8964426
    Abstract: A switched-mode power supply (SMPS) and a method of control thereof is described, wherein the SMPS is operable to apply a spread spectrum modulation to a switching driver signal to reduce EMI in the SMPS. The SMPS is operable to perform voltage and current monitoring in parallel to the spread spectrum modulation to provide variable limit threshold detection and shutdown capabilities for circuit protection.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: February 24, 2015
    Assignee: PR Electronics A/S
    Inventors: Stig Alnøe Lindemann, Mads Kolding Nielsen
  • Publication number: 20150043255
    Abstract: A high voltage generator includes a voltage converting device configured to increase a level of an input voltage and output an output voltage having a level higher than the level of the input voltage. The high voltage generator also includes a precharge controller configured to gradually increase the level of the input voltage up to a level of an external voltage based on a reference voltage and the output voltage.
    Type: Application
    Filed: July 21, 2014
    Publication date: February 12, 2015
    Inventors: Young-Il KIM, Sang-Sun LEE, Sung-Wook CHOI
  • Publication number: 20150029767
    Abstract: A power controller in a multi-chip module is disclosed. The power controller comprises a power controller die, an ultra-high voltage startup die, and a multi-chip module. The power controller die is operable to control a power switch when powered by an operation power source. The operation power source has a maximum voltage limit of tens volt. The ultra-high voltage startup die comprises an ultra-high voltage pad tolerable to receiving an input line voltage higher than one hundred volt. During a startup procedure the ultra-high voltage startup die charges the operation power source, and during a normal operation the ultra-high voltage startup die substantially performs an open-circuit. The multi-chip module packages both the power controller die and the ultra-high voltage startup die.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 29, 2015
    Inventor: Chiung-Feng Chou
  • Patent number: 8942012
    Abstract: At least one embodiment is directed to a semiconductor voltage controller comprising: a start-mode circuit associated with a start-mode; and an off-mode circuit associated with an off-mode, where the voltage controller can be configured to receive a feedback signal and an off-mode signal from a single input and provide an output voltage, where the voltage controller can be configured to be in the off-mode when the feedback signal is less than a skip level and the feedback signal is less than a HV control level, and where the voltage controller can be configured to be in start mode when the feedback signal is greater than HV control level and Vcc is below a Vcc-start.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 27, 2015
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Jean-Paul Louvel
  • Publication number: 20150022105
    Abstract: A method and system for extending the power output range of a power converter used for a lighting system is disclosed.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Applicant: SUPERTEX, INC.
    Inventor: James T. Walker
  • Publication number: 20150023072
    Abstract: For starting-up a power converter, an AC rectified voltage is generated upon power-up of the power converter. A depletion mode transistor generates a first voltage from the rectified voltage. The first voltage is inputted to a controller of the power converter to provide power for operation of the controller before an output stage of the power converter starts outputting power. A gate biasing voltage is generated from the first voltage and supplied to a gate terminal of the depletion mode transistor to bias the gate terminal of the depletion mode transistor.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventors: Mohammad AL-SHYOUKH, Percy NEYRA
  • Patent number: 8934271
    Abstract: A startup circuit includes a MOSFET that is connected between a startup power source and an auxiliary power source made of a smoothing capacitor and passes a startup current from the startup power source to the smoothing capacitor, a JFET that has a drain terminal connected to a drain terminal of the MOSFET and a source terminal connected through a resistor to a gate terminal of the MOSFET, and a pinch-off voltage controller that controls a pinch-off voltage of the JFET to a first reference voltage at startup and to a second reference voltage, which is lower than the first reference voltage, after startup.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: January 13, 2015
    Assignee: Sanken Electric Co., Ltd.
    Inventors: Hideyuki Kubota, Satoshi Kondou
  • Patent number: 8929106
    Abstract: The power conversion module includes a power converter coupled to provide a DC output voltage from an input voltage source. The power converter may have primary and secondary stages, and the power converter may also provide a DC output voltage that is electrically isolated from the input voltage source. Additionally, the power conversion module also includes a voltage controller configured to measure a pre-bias value of the output voltage prior to start-up of the power converter and provide a start-up control signal, wherein the start-up control signal corresponds to an initial output voltage that is greater than the pre-bias value of the output voltage. The initial output voltage includes a start-up voltage margin above the pre-bias value and is maintained for a margin hold time. A method of operating a power conversion module is also provided.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: January 6, 2015
    Assignee: General Electric Company
    Inventors: Raghothama Reddy, Stephen Guthrie, Subarna Pal
  • Publication number: 20140376285
    Abstract: The invention relates to auxiliary power supplies.
    Type: Application
    Filed: June 21, 2013
    Publication date: December 25, 2014
    Applicant: Supertex, Inc.
    Inventors: Marc Tan, Alexander Mednik, Simon Krugly, Wilson Wai-Sum Chan
  • Patent number: 8913406
    Abstract: A power conversion system includes a shared output bus and a plurality of power conversion units coupled to the shared output bus. Each power conversion unit includes a power converter having a converter output coupled to the shared output bus and a delay generator that generates a start-up delay for the power converter if a pre-bias value of a bus voltage on the shared output bus is greater than a predefined threshold. Each power conversion unit also includes a voltage controller that controls the converter output subsequent to the start-up delay and maintains a current sourcing condition of the converter output during start-up of the power converter. The power conversion system also includes a load that is coupled to the shared output bus. A method of operating a power conversion unit is also provided.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: December 16, 2014
    Assignee: General Electric Company
    Inventors: Stephen Guthrie, Subarna Pal
  • Patent number: 8897037
    Abstract: Power conversion system and method. The system includes a first capacitor, a second capacitor, and a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode. Additionally, the system includes a fifth diode including a first anode and a first cathode and a sixth diode including a second anode and a second cathode. Moreover, the system includes a primary winding, and a secondary winding coupled to the primary winding. The first anode is connected to a first input terminal, and the second anode is connected to a second input terminal. The first input terminal and the second input terminal are configured to receive an input voltage. The secondary winding is configured to generate an output voltage based on at least information associated with the input voltage.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: November 25, 2014
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yingchieh Lin, Bo Li, Lieyi Fang
  • Patent number: 8891268
    Abstract: One embodiment of the invention relates to a switching control system for controlling an isolated power supply. The system includes a pulse-width modulation (PWM) switching controller configured to generate at least one primary switching signal having a first duty-cycle for activating at least one primary-side switch of the isolated power supply. A synchronous rectifier (SR) switching controller is configured to generate at least one SR switching signal having a second duty-cycle for activating at least one SR switch of the isolated power supply to conduct an output current through a secondary winding of a transformer and an output inductor to generate an output voltage, the second duty-cycle being independent of the first duty-cycle in a soft-start mode.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 18, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Lin Sheng, Xiaojun Xu
  • Publication number: 20140334200
    Abstract: Aspects of the disclosure provide a circuit. The circuit includes a depletion mode transistor coupled to a power supply and a current path coupled with the depletion mode transistor in series to provide a current to charge a capacitor. The current path has a first resistance during a first stage, such as when the circuit initially receives power, and has a second resistance during a second stage when the capacitor is charged to have a predetermined voltage level.
    Type: Application
    Filed: July 25, 2014
    Publication date: November 13, 2014
    Applicant: Marvell World Trade Ltd.
    Inventors: Siew Yong Chui, Jun Li
  • Publication number: 20140321175
    Abstract: A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the string and produces output power. When the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.
    Type: Application
    Filed: July 3, 2014
    Publication date: October 30, 2014
    Inventors: Meir Adest, Guy Sella, Lior Handelsman, Yoav Galin, Amir Fishelov, Meir Gazit
  • Patent number: 8873255
    Abstract: A power supply and its startup circuit are provided. The startup circuit includes a first transistor, a bias resistor, a pull-down switch, a voltage detector, and a discharging path generator. A first end of the first transistor receives alternating current (AC) input power. The bias resistor is serially coupled between a second end and a control end of the first transistor. The pull-down switch is turned on or turned off according to a detection result. The voltage detector generates the detection result by detecting a voltage on the second end of the first transistor. The discharging path generator provides a discharging path between the second end of the first transistor and a reference ground voltage according to the detection result.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: October 28, 2014
    Assignee: Excelliance MOS Corporation
    Inventors: Hung-Che Chou, Fu-Chun Huang, Pao-Chuan Lin
  • Publication number: 20140301120
    Abstract: Systems, power modules (108), and methods (200) for using in controlling a converter (110) coupled between a power generator (104) and an electric grid (102) are provided. One of the power modules (108) includes the converter (110) configured to supply an output from the power generator (104) to the electric grid (102), and a controller (112) coupled to the converter (110). The controller (112) includes a phase-lock-loop (PLL) module (123) and at least one regulator (128, 130). The at least one regulator (128, 130) is configured to at least partially control the converter (110) as a function of at least one parameter.
    Type: Application
    Filed: October 28, 2011
    Publication date: October 9, 2014
    Applicant: General Electric Company
    Inventors: Huibin Zhu, David Smith, Jun Zhu, Xueqin Wu
  • Publication number: 20140293662
    Abstract: A switched mode power supply (SMPS) is disclosed in which a simple primary side controller is used to send a single pulse of energy to the secondary side to switch on an output voltage controller. The pulse is sent across the main power train and a filtering arrangement is provided on the secondary side to minimise the energy at the output of the SMPS while maximising the energy supplied to the output voltage controller. Advantageously, the SMPS is configured such that the maximum amount of energy transferred from the primary side to the secondary side during a start-up operation is inherently limited. Protection against short circuit conditions and malfunctions is therefore provided without requiring complicated circuitry.
    Type: Application
    Filed: April 15, 2011
    Publication date: October 2, 2014
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Oscar Persson, Mikael Appelberg, Marko Leskovec
  • Publication number: 20140292219
    Abstract: A power-supply device includes a rectifying unit configured to rectify a phase-controlled AC voltage; a current limiting unit including a current limiting resistor, which limits an input current flowing from the rectifying unit at rise of a rectified voltage outputted from the rectifying unit; and an adjustment unit configured to cause the current limiting unit to limit the input current flowing from the rectifying unit until a predetermined time period has elapsed after an input of the AC voltage to the rectifying unit is started.
    Type: Application
    Filed: September 12, 2013
    Publication date: October 2, 2014
    Applicant: MINEBEA CO., LTD.
    Inventors: Shinichi SUZUKI, Hideharu KANAMITSU
  • Publication number: 20140293665
    Abstract: A damage limitation approach comprising determining that a voltage produced by a rectifier circuit is indicative of a fault and consequently controlling a switch operable to bypass a resistive element of a circuit via which the rectifier circuit is supplied.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: Control Techniques Limited
    Inventors: Simon David Hart, Antony John Webster, Kondala Rao Gandu