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| Number | Title | Issue Date |
| 8174250 | Fixed frequency ripple regulator A ripple regulator for providing a pulse width modulation (PWM) signal for regulating an output voltage of a power converter switching stage. The regulator including a ripple circuit for providing a ripple voltage; a comparison circuit for comparing the ripple volta... | 05/08/2012 |
| 8159200 | DC-DC converter circuits, and methods and apparatus including such circuits Electrical power from an input voltage supply is converted to first and second output voltages of opposite polarities using a single inductor (L) and only four principal switches (S1, S2, S4, S6). In contrast to known circuits, none of th... | 04/17/2012 |
| 8154264 | Method and systems for conduction mode control Methods for selecting between the two modes (states) of operation, continuous conduction and discontinuous conduction, are disclosed. Systems that are capable of selecting the operating mode and operating in the continuous conduction mode or the discontinuous conduc... | 04/10/2012 |
| RE43291 | PFM-PWM DC-DC converter providing DC offset correction to PWM error amplifier and equalizing regulated voltage conditions when transitioning between PFM and PWM modes To prevent a voltage glitch in the regulated DC output voltage of a PWM/PFM DC-DC converter when switching between PFM and PMW modes, the error amplifier of the converter's PWM regulation path is provided with a DC voltage offset correction mechanism. This mechanism... | 04/03/2012 |
| 8134351 | Four-switch step-down storageless converter A four-switch step-down storageless DC-DC converter is provided having simultaneously ultra high efficiency of over 99% in an ultra compact size, while also providing a regulation and maintaining fast transient response while in regulation. Because of its storageles... | 03/13/2012 |
| 8129963 | DC to DC converter The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET1) for the voltage conversion, a bipolar transistor (BP1) as a starting aid, and a second field effect transistor (FET2... | 03/06/2012 |
| 8125202 | Protection circuit for protecting a half-bridge circuit The present invention relates to a protection circuit for protecting a half-bridge circuit. The protection circuit detects an incorrect response of the half-bridge by monitoring the current of a first switch at a series resistor of a second switch. The protec... | 02/28/2012 |
| 8120337 | Inverter driver and load driver including the same, and driving method thereof A load driver includes an inverter and an inverter driver. The inverter converts an input voltage into a driving voltage of a discharge lamp using at least one first switch for switching according to a duty ratio, and the inverter driver controls the inverter. The i... | 02/21/2012 |
| 8076914 | Switching regulator including low-pass filter configured to have time constant for step-up operation and time constant for step-down operation A switching regulator includes a step-down-and-step-up unit to convert an input voltage to a low voltage or to a high voltage in accordance with a control signal, and a controller including a low-pass filter to receive a reference voltage generated in accordance wit... | 12/13/2011 |
| 8076915 | Switching converter To improve conversion efficiency at a DC-DC conversion time by providing driving units respectively for a plurality of switches and controlling the switches corresponding to a load current, an input voltage, an output voltage and an input/output voltage difference. ... | 12/13/2011 |
| 8063616 | Integrated III-nitride power converter circuit One disclosed embodiment is a power conversion circuit including a power conversion bridge between a bus voltage and ground, including a switched node for supplying current to an output circuit. A driver section is configured to drive the power conversion bridge tha... | 11/22/2011 |
| 8058855 | Direct current converter A direct current converter includes a first node, a second node, an input voltage terminal, an output voltage terminal, a bootstrap source terminal, a low-voltage terminal, a control module for generating a control signal, a driving-stage circuit coupled to the inpu... | 11/15/2011 |
| 8054054 | High voltage gate driver IC (HVIC) with internal charge pumping voltage source A circuit for using a high voltage gate driver IC (HVIC) for regulation of external floating voltage sources without use of regulation circuits. The circuit including high and low switches; at least one external voltage source coupled to the high and low switches; a... | 11/08/2011 |
| 8049473 | Power supply circuit A power supply circuit includes a pulse width modulation (PWM) signal generator, a current adjustment unit, a drive unit, and a feedback unit. The PWM signal generator outputs a PWM voltage signal to the drive unit. The drive unit outputs a first control signal to c... | 11/01/2011 |
| 8044644 | Symmetric sample and hold over-current sensing method and apparatus An over-current condition is detected in a synchronous DC-DC converter by sampling and holding a measured load current value. The load current is sampled while a low-side transistor is ON and then held when the low-side transistor is OFF. The held value is compared ... | 10/25/2011 |
| 8040117 | Closed loop negative feedback system with low frequency modulated gain A power supply apparatus and method of regulating is provided. A clock generator circuit is configured for generating a clock signal at a predetermined frequency. An amplifier circuit is coupled with the clock generator circuit. The amplifier circuit includes a gain... | 10/18/2011 |
| 8040116 | Automatically configurable dual regulator type circuits and methods Automatically configurable dual regulator type circuits and methods are provided. On embodiment of the invention includes an automatically configurable dual regulator type circuit. The circuit comprises a high-side switching device (HS-SD) coupled to a low-side swit... | 10/18/2011 |
| 8035360 | Soft start unit for a power converting device A power converting device including a pulse width modulation circuit, a switch unit, a power output unit and a voltage start unit is provided. The pulse width modulation circuit increases a start voltage in a soft start mode and is operated under the start voltage t... | 10/11/2011 |
| 8030909 | Method and apparatus for switching a synchronous DC/DC converter between a PWM mode of operation and a light-load mode of operation A synchronous buck converter operates in a PWM mode of operation and switches to light-load mode of operation under a light-load condition. When operating in the light-load mode, the synchronous buck converter transitions between a burst mode and an idle mode of ope... | 10/04/2011 |
| 8018214 | Regulator with soft-start using current source There is provided a regulator with soft-start using a current source. The regulator with soft-start may include: a power switch unit including first and second power switches connected between a power supply terminal and an output terminal; a load capacitor connecte... | 09/13/2011 |
| 8008900 | DC-DC converter A DC-DC converter providing a DC output voltage at an output node. The DC-DC converter comprises an output stage, a digital controller, and a controller. The output stage comprises a pull-up circuit having a control terminal and coupled between a first fixed voltage... | 08/30/2011 |
| 8004256 | Current limiting circuit A current limiting circuit for a boost converter includes a voltage divider circuit between a main switch which flows a current to an inductor and a comparator included in a current detecting circuit. The voltage divider circuit includes two transistors of the same ... | 08/23/2011 |
| 7999523 | Driver with improved power supply rejection A technique reduces effects of power supply noise on a signal output by an integrated circuit output driver circuit powered at least partially by an external power supply. An integrated circuit includes a first circuit that provides a first version of a signal to be... | 08/16/2011 |
| 7994763 | DC-DC converter circuits, and methods and apparatus including such circuits Electrical power from an input voltage supply is converted to first and second output voltages of opposite polarities using a single inductor (L) and only four principal switches (S1, S2, S4, S6). In contrast to known circuits, none of th... | 08/09/2011 |
| 7994762 | DC to DC converter A DC to DC converter comprising an inductor, first and second electrically controllable switches and a controller, wherein the first electrically controllable switch is interposed between an input node and a first terminal of the inductor and the second electrically... | 08/09/2011 |
| 7990117 | Low-loss control of DC-DC converters in an energy storage system An energy storage system including a buck-boost DC-DC converter operable so as to minimize switching loses. The system includes a first energy storage device, e.g., a bank of ultracapacitors, and a second energy storage device, e.g., a second bank of electrolytic ca... | 08/02/2011 |
| 7990118 | Switching regulator with high efficiency in light load mode An exemplary switching regulator, is provided. The switching regulator includes an oscillator, a PWM logic controller, an inductor, a capacitor, a switch, a driver, a current sense amplifier, and a minimum power pulse width generator. The current sense amplifier and... | 08/02/2011 |
| 7982443 | DC to DC voltage converter with stacked synchronous buck converters A circuit for converting voltages is provided. The circuit includes a switch circuit coupled in series with an input node and a reference node. The switch circuit includes at least three controllable switches coupled in series and an inductive low pass output stage ... | 07/19/2011 |
| 7977928 | Method and apparatus for modifying right half-plane zero in a cascaded DC-DC buck-boost converter A method to generate a substantially DC output having a voltage level different than a DC input, constituted of receiving a feedback signal representing at least one of the voltage level and the current level of the generated substantially DC output; relatively emph... | 07/12/2011 |
| 7952334 | DC-DC converter A DC-DC converter includes a series circuit of a switch element Q1 and a switch element Q2 connected to a DC power source, a series circuit of a primary winding P1 of a transformer and a capacitor connected in parallel with one of the switch ele... | 05/31/2011 |
| 7948221 | Electric power converter The invention provides an optimal electric power converter for a DC/DC converter which variably steps up a voltage successively with an optional magnification of one to two times or more and/or step down a voltage successively with a step-down ratio of one time or l... | 05/24/2011 |
| 7928704 | Droop circuits and multi-phase DC-DC converters A droop circuit of a DC-DC converter is provided, wherein the DC-DC converter includes an output inductor coupled between an output of the DC-DC converter and a phase node for providing an output voltage. A current sense device is coupled between the phase node and ... | 04/19/2011 |
| 7923977 | DC-DC converters with transient response control A DC-DC converter used to convert an input voltage to an output voltage is disclosed. The DC-DC converter comprises a pulse-width-modulation (PWM) generator, a transient boost circuit, a logic circuit, a switching device, and a buck circuit. The pulse-width-modulati... | 04/12/2011 |
| 7888920 | Power supply device with fast output voltage switching capability A power supply device is disclosed in the present invention, which includes a DC-DC boost converter and a charge recycling circuit. The DC-DC boost converter is utilized for boosting an input voltage to generate an output voltage, and adjusting a voltage level of th... | 02/15/2011 |
| 7876076 | Circuit for preventing through current in DC-DC converter A DC-DC converter for preventing through current from causing erroneous operation of an ideal diode. A first transistor for receiving input voltage is connected to an ideal diode, which includes a second transistor and a comparator for detecting current flowing thro... | 01/25/2011 |
| 7872458 | DC-to-DC converter A DC-to-DC converter includes a DC-to-DC conversion unit for converting an input voltage into an output voltage by switching operation of the switching element according to a drive signal and supplying the output voltage to a load and a control unit for generating t... | 01/18/2011 |
| 7863872 | Buck-boost switching regulator and control method thereof The present invention discloses a buck-boost switching regulator, comprising: (1) a first loop including: a first and a second switch electrically connected with each other, the first switch having an end electrically connected with an input voltage, and the second ... | 01/04/2011 |
| 7843179 | Control circuit for synchronous rectifier-type DC-DC converter, synchronous rectifier-type DC-DC converter and control method thereof To provide a control circuit for a synchronous rectifier-type DC-DC converter, a synchronous rectifier-type DC-DC converter and a control method thereof in which, in a light load state and a no-load state, an output voltage can be dropped to thus prevent an overshoo... | 11/30/2010 |
| 7839129 | On-chip power supply voltage regulation An integrated circuit (100) is provided with power regulating circuitry (104) serving to actively regulate the voltage difference between a first power supply rail Vdd and a second power rail Vss being used to supply electrical po... | 11/23/2010 |
| 7821241 | Integrated switch with internally adjusted conduction time An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. An integrated circuit according to aspects of the present invention regulates an output of a power supply and includes a switch coupled to receive an e... | 10/26/2010 |
