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| Number | Title | Issue Date |
| 8174249 | Voltage boosting/lowering circuit A voltage boosting/lowering circuit in accordance with present invention includes an output voltage generation circuit including a first switch element connected between an input terminal and one end of a choke coil and a second switch element connected between the ... | 05/08/2012 |
| 8093874 | Method and system for adding boost functionality to a buck switcher with minimal cost A buck (with boost) switcher is provided that adds boost functionality to a buck switcher without compromising the buck's performance with extra series-coupled switches nor requiring a second inductor. The switcher has an integrated circuit that is capable of receiv... | 01/10/2012 |
| 8089254 | Digital control of power converters A method of controlling a DC/DC converter to regulate an output voltage from an input voltage source that varies from a fully-charged voltage to a discharged voltage. The method introduced improves the dynamic response of the converter during transients by switching... | 01/03/2012 |
| 8085011 | Boost regulator using synthetic ripple regulation A boost regulator for converting an input voltage to a higher output voltage including an inductor, an error circuit, a switching circuit, a ripple circuit, and a hysteretic comparator circuit. The inductor has a first end coupled to the input voltage and a second e... | 12/27/2011 |
| 8018212 | Buck-boost regulator A buck-boost regulator for converting an input voltage to an output voltage which includes an inductor, an error circuit providing an error voltage, buck and boost switching circuits, buck and boost ripple circuits, and buck and boost hysteretic comparator circuits.... | 09/13/2011 |
| 7944191 | Switching regulator with automatic multi mode conversion Methods and apparatus are disclosed for efficient switching regulators that adapt automatically to, and operate with, input voltages that are above, below, or equal to the output voltage. The disclosed switching regulators demonstrate advantages of both buck and boo... | 05/17/2011 |
| 7915876 | Power converter with snubber A buck or boost converter, which includes a first inductor, a controlled switch, a main diode, and an output capacitor, also includes a snubber circuit to reduce losses. The snubber circuit includes a second inductor in a path in series with the switch and main diod... | 03/29/2011 |
| 7915875 | Current-mode controlled DC-DC converter A current-mode controlled DC-DC converter includes a comparator comparing a first or second current detection signal with a first or second reference current that is based on an error voltage of a voltage detection signal, a pulse generator generating a first pulse ... | 03/29/2011 |
| 7884586 | Controlling a switching regulator mode determined by an ideal duty cycle for maintaining high efficiency for a wide input voltage range This disclosure relates to a voltage regulator system where duty cycle value of an input voltage is measured, where the input voltage is supplied to a regulator circuit that provides a regulated output voltage. Based on a calculated ideal duty cycle, which is derive... | 02/08/2011 |
| 7804283 | Mode transitioning in a DC/DC converter using a constant duty cycle difference According to an exemplary embodiment, a method includes the step (910) of driving a buck section of a DC/DC converter with a buck signal that has a buck duty cycle and concurrently with driving the buck section, driving a boost section of the DC/DC converter ... | 09/28/2010 |
| 7768245 | Emulator circuit, a controller for a switched mode power supply, and a switched mode power supply An emulator circuit for forming a signal representative of current flow in an inductor of a switched mode power supply, where the inductor is associated with a switching arrangement operational to connect a first node of the inductor to a first voltage (Vin | 08/03/2010 |
| 7737668 | Buck-boost switching regulator A buck-boost switching regulator which includes a first switch, a first diode, an inductor, a second switch, a second diode, and a controller for controlling the first switch and the second switch, the controller being configured to receive a current signal indicati... | 06/15/2010 |
| 7723966 | Switching voltage regulator control device A switching voltage regulator control device, includes first and second half-bridges each comprising a switch. The first half-bridge is located between an input voltage and a reference voltage and the second half-bridge is located between an output voltage and the r... | 05/25/2010 |
| 7701179 | Control circuit and method for multi-mode buck-boost switching regulator A control circuit of a multi-mode buck-boost switching regulator and a method thereof are provided. The control circuit imposes ON/OFF timing sequences on switches according to the relationship between two controlling triangle waves and the load fluctuation. In each... | 04/20/2010 |
| 7652453 | Topology for a positive buck-boost switching regulator A new topology for a buck-boost switching regulator is provided herein. Embodiments provide an efficient buck-boost switching regulator that provides a regulated output voltage from an unregulated input voltage. Embodiments include a buck-boost switching regulator t... | 01/26/2010 |
| 7579814 | Power converter with snubber A buck or boost converter, which includes a first inductor, a controlled switch, a main diode, and an output capacitor, also includes a snubber circuit to reduce losses. The snubber circuit includes a second inductor in a path in series with the switch and main diod... | 08/25/2009 |
| 7570034 | Step-up/down DC-DC converter A step-up/down DC-DC converter is disclosed that includes: a step-up/down part generating an output voltage by stepping up or down an input voltage; and a control part generating an error signal indicating an error between a voltage value obtained by dividing the ou... | 08/04/2009 |
| 7570033 | Apparatus and method for PWM buck-or-boost converter with smooth transition between modes A PWM buck-or-boost converter is provided. The converter includes an error amplifier, a rectifier/splitter, a first comparator, and a second comparator. The rectifier/splitter provides two signals proportional to the departure of the error voltage from a central val... | 08/04/2009 |
| 7560911 | Step-up/step-down switching regulator A disclosed step-up/step-down switching regulator includes a step-up/step-down part using an inductor for stepping up or stepping down an input voltage from an input terminal and outputting the stepped-up/stepped-down voltage from an output terminal according to a c... | 07/14/2009 |
| 7557546 | Unidirectional DC-DC converter A unidirectional DC-DC converter which has a simple control circuit without using multiple insulated power supplies or a transformer, uses an auxiliary inductor of a comparatively small capacitance, reduces the size and weight of the converter, and has a very great ... | 07/07/2009 |
| 7511461 | Switching regulator control circuit which prevents shoot-through current in a synchronous rectifier In a maximum duty control state of a switching regulator control circuit, a period of time during which any one of a step-up switching circuit and a synchronous rectification switching circuit is always off is ensured, thereby preventing the switching efficiency fro... | 03/31/2009 |
| 7501802 | DC-DC converting method and apparatus A DC-DC converting apparatus including a step-up and step-down circuit stepping up/down an input voltage to generate an output voltage and a PWM control circuit. The PWM control circuit generates an error signal, first to third voltages, a first triangular wave sign... | 03/10/2009 |
| 7495419 | Apparatus and method for PFM buck-or-boost converter with smooth transition between modes A PFM buck-or-boost converter is provided. The converter includes, inter alia, a hysteretic comparator, current sense circuitry, a logic circuit, drivers, current sense circuitry, a first buck switch, and a first boost switch. The current sense circuitry asserts sig... | 02/24/2009 |
| 7466112 | Variable frequency current-mode control for switched step up-step down regulators A switched regulator circuit provides step-up and step-down operation in which the level of the input voltage can be greater, equal to, or less than a preset controlled output voltage. A four switch arrangement or two switch arrangement provides buck, boost, and buc... | 12/16/2008 |
| 7443147 | DC-DC converter with step-up and step-down control capable of varying the offset voltage of the PWM triangle When both step-up PWM control and step-down PWM controls are executed, the offset of the ON/OFF switching timing for step-up PWM control and/or the offset of ON/OFF switching timing for step-down PWM control are changed to become identical. By synchronizing ON/OFF s... | 10/28/2008 |
| 7432689 | Buck-boost control logic for PWM regulator A PWM regulator is operated either a buck mode or a boost mode depending on whether the input voltage is above or below the desired regulated output voltage. The technique uses two sawtooth ramps 180 degrees out of phase. Where the two ramps cross each other is a bu... | 10/07/2008 |
| 7394231 | Current-mode control for switched step up-step down regulators A switched regulator circuit provides step-up and step-down operation in which the level of the input voltage can be greater, equal to, or less than a preset controlled output voltage. A four switch arrangement or two switch arrangement provides buck, boost, and buc... | 07/01/2008 |
| 7391189 | Step-up/down DC-DC converter A step-up/down DC-DC converter is disclosed that includes: a step-up/down part generating an output voltage by stepping up or down an input voltage; and a control part generating an error signal indicating an error between a voltage value obtained by dividing the ou... | 06/24/2008 |
| 7372397 | Energy storage in a radar level gauge A radar level gauge using microwaves for measuring a level of a surface of a product in a container, comprising a microwave unit, processing circuitry connected to said microwave unit, an interface for connecting said radar level gauge externally thereof, and a powe... | 05/13/2008 |
| 7368957 | Capacitively coupled floating gate driver High-performance low-power isolated bootstrapped gate drive apparatus and methods are disclosed for driving high-side and floating transistors. The gate drivers use edge-triggered capacitive-coupled inputs. The gate drivers may include detection and delay circuitry ... | 05/06/2008 |
| 7365998 | Unregulated isolated DC/DC converter with ripple control An unregulated isolated DC/DC converter is configured to receive an input signal and to provide an output signal. A ripple control circuit is coupled to the unregulated isolated DC/DC converter, wherein the ripple control circuit is configured to reduce an amount of... | 04/29/2008 |
| 7362077 | Pre-charge method for isolated boost converter A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module that complementarily transitions a first semiconductor switch and a ... | 04/22/2008 |
| 7359219 | Power supply A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter are each connected to the primary control unit. ... | 04/15/2008 |
| 7339366 | Directional coupler for a accurate power detection A power detection system implemented using a pair of directional couplers and a transmission line (or equivalent) disposed between the directional couplers, wherein the transmission line (or equivalent) provides a 90° phase shift between the directional couplers. A... | 03/04/2008 |
| 7336056 | Switching power converter that supports both a boost mode of operation and a buck mode of operation using a common duty-cycle timing signal The present invention is a switching power converter that supports both a boost mode of operation and a buck mode of operation, uses one energy storage element, transitions smoothly between boosting and bucking, and avoids simultaneous boosting and bucking. The swit... | 02/26/2008 |
| 7323850 | Current detection circuit and switching power supply using the same A current detection circuit of the present invention has a switching device 1; an auxiliary switching device 2; an offset voltage source comprising an offset resistor device 7 and a current source circuit 8; a compensation circuit, compri... | 01/29/2008 |
| 7309975 | Process for operating a switching power supply There is provided a process for operating a switch mode power supply circuit (Switcher) connectable to a load, the circuit having a first buck switch, a second boost switch and an inductor in a buck boost circuit, the process including applying input voltage to the ... | 12/18/2007 |
| 7292014 | Controller and loading system thereof A loading system and a controller thereof are disclosed. The controller includes an adjustable triangle wave generator, an error signal generator, and a pulse signal generator. The triangle-wave generator is adapted to perform an amplitude and frequency operation ac... | 11/06/2007 |
| 7289341 | Power supply adaptive feedforward control circuit A power supply system is disclosed. In one embodiment the power supply system includes a source of DC power that provides a DC bus voltage between a pair of DC bus terminals, and a power supply that receives power from the DC bus terminals and delivers power to a lo... | 10/30/2007 |
| 7276886 | Dual buck-boost converter with single inductor A dual output buck-boost power converter operates with a single inductor to achieve high efficiency with automatic or inherent load balancing. Switches associated with the opposite polarity outputs are driven based on feedback signals, with one feedback signal being... | 10/02/2007 |
