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| Number | Title | Issue Date |
| 8179106 | DC-DC converter A synchronous-rectifier type DC-DC converter includes a high-side main switch element, a low-side rectifying switch element, and a control drive circuit. The rectifying switch element includes a rectifying transistor element and a rectifying diode element connected ... | 05/15/2012 |
| 8179105 | Systems and methods for controlling output currents of power converters A power converter can include a high-side switch coupled to a power supply terminal and selectively coupled to ground via a conduction path. During an on state duration, the high-side switch can be enabled and the conduction path can be disabled. During an off state... | 05/15/2012 |
| 8169200 | Power converter with power switch operable in controlled current mode A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch co... | 05/01/2012 |
| 8154261 | Power converter with power switch operable in controlled current mode A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch co... | 04/10/2012 |
| 8134349 | Power supply circuit that outputs a voltage stepped down from a power supply voltage A power supply circuit has a constant voltage circuit, a first MOS transistor, a second MOS transistor, a third MOS transistor, a first voltage dividing circuit that outputs a first divided voltage obtained by dividing the voltage of the output terminal by a first v... | 03/13/2012 |
| 8120335 | Average inductor current mode switching converters An average current mode switching converter is described for providing a regulated output current independent of load conditions, and a regulated output voltage as a function of the load connected to the converter. The converter includes an inductor, a modulator, a ... | 02/21/2012 |
| 8120336 | Switching regulator circuit, system, and method for providing input current measurement without a dedicated input current sense element A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator and being operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to... | 02/21/2012 |
| 8111051 | Step-down switching regulator An output monitoring comparator outputs an ON signal when an output voltage becomes lower than a reference voltage. A pulse modulator generates a pulse signal at a predetermined level, an ON time-period from when the ON signal is outputted. A driver circuit alternat... | 02/07/2012 |
| 8089253 | Power supplies for RF power amplifier Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in battery-powered wireless transmitter devices involve a Boost-type SMPS and a Buck-type SMPS in cascade connection which are controlled so that high efficiency... | 01/03/2012 |
| 8085007 | Switching power supply circuit A switching power supply circuit, which includes: a switch; a coil serving as an energy transmitting element; and a capacitor serving as an output generation circuit that outputs, as an output voltage, the energy transmitted from the coil. The switching power supply... | 12/27/2011 |
| 8072195 | Voltage converter A voltage converter connectable to a power source (PS) and a load (LD) provides a regulated output voltage (Vout) from a voltage (Vin) power source by switchable current paths including an inductive element (L). The voltage converter includes a plurality of switchin... | 12/06/2011 |
| 8044641 | Step-down switching regulator with turn off undershoot prevention A step-down switching regulator prevents an output voltage undershoot and enables a quick lowering of an output voltage immediately after turning off of power supply. The step-down switching regulator includes an NMOS transistor connected between an output terminal ... | 10/25/2011 |
| 8044642 | Power supply device capable of stably supplying output voltage with increased responsiveness In a power supply device, a synchronous rectifier step-down converter alternately turns on and off a switch and a synchronous rectifier switch. A reference voltage generator generates a predetermined reference voltage. An error amplifier outputs an error voltage suc... | 10/25/2011 |
| 8018209 | Switching regulator for fixing frequency A switching regulator for fixing a frequency which includes a power stage circuit, for receiving an input voltage and outputting an output voltage according to an control signal; a reference voltage generator for generating a reference voltage; a comparator for outp... | 09/13/2011 |
| 8018208 | Error amplification for current mode control switching regulation A voltage regulator has a switch configured to alternately couple and decouple a voltage source through an inductor to a load, feedback circuitry to generate a feedback current, a current sensor configured to measure the feedback current, and a controller configured... | 09/13/2011 |
| 8018210 | Voltage converting circuit and method thereof A voltage converting circuit including a power stage, a filter, a comparator, a first and a second feedback units. The power stage receives an input voltage and outputs the input voltage according to a duty cycle. The filter receives the input voltage to convert the... | 09/13/2011 |
| 7973518 | Low noise voltage regulator In general, in one aspect, the disclosure describes a voltage regulator (VR) that includes a first amplifier receiving a first reference voltage and a feedback voltage as inputs. A second amplifier receiving a second reference voltage and an output of the first ampl... | 07/05/2011 |
| 7960950 | Zero current switching A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode. The switching power converter converts power from input power to output power. The switching power converter includes a main switch conn... | 06/14/2011 |
| 7960949 | Power converter A power converter (1) comprises a voltage level increasing circuit (3) which receives a DC-input voltage (VIN) between first and second power converter inputs (IN1, IN2), and which has an output (O1; O2, O3) to supply... | 06/14/2011 |
| 7948220 | Method and apparatus to reduce dynamic Rdson in a power switching circuit having a III-nitride device A method of preventing the Rdson of a III-V Nitride power switching circuit from varying over time. The method includes biasing the switch to a pre-bias voltage level just below turn ON when the switch is OFF, wherein traps are discharged when the switch is biased t... | 05/24/2011 |
| 7928703 | On-chip current sensing One embodiment of the invention includes an on-chip current-sense system for measuring a magnitude of an output current through a power transistor. The system includes a first sense transistor that conducts a first reference current to or from a phase node and a sec... | 04/19/2011 |
| 7928702 | Driving circuit for use with high voltage depletion-mode semiconductor switches A driving circuit for a half bridge utilizing bidirectional semiconductor switches in accordance with an embodiment of the present application includes a high side driver operable to control a high side bidirectional semiconductor switch, wherein the high side drive... | 04/19/2011 |
| 7923975 | Analog variable-frequency controller and switching converter therewith An analog variable-frequency controller includes a first current generator, a second current generator, a clock generator and a light/heavy load selector. The first and second current generator receive a load current signal and then output a first voltage signal and... | 04/12/2011 |
| 7915873 | Mode control circuit for switching regulators and method therefor A mode control method and apparatus for a switching regulator is disclosed. The method receives an input signal and amplifying the input signal to get an amplified signal. The amplified signal is sent to a sample circuit to get a sample signal. The sample signal is ... | 03/29/2011 |
| 7915874 | Step-down converter having a resonant inductor, a resonant capacitor and a hybrid transformer Unlike buck converter and tapped-inductor buck converters, which use only inductive energy transfer, the present invention employs the capacitive energy transfer in addition to inductive energy transfer. The hybrid transformer performs the double duty simultaneously... | 03/29/2011 |
| 7902800 | Adaptive power supply and related circuitry A power supply configuration includes a monitor circuit to monitor an output voltage and output current of a power supply. The output voltage can be used to supply power to a dynamic load. The power supply varies a rate of changing an adaptive output voltage referen... | 03/08/2011 |
| 7888918 | Control circuit for multi-phase converter A control circuit for use in controlling a phase of a multi-phase voltage converter in accordance with an embodiment of the present invention includes a driver operable to provide a first control signal to a high side switch of a half-bridge of the phase and a secon... | 02/15/2011 |
| 7872456 | Discontinuous conduction mode pulse-width modulation One embodiment of the invention includes a power regulator system. The system includes a switching system configured to generate an output voltage across a load based on a high-side switch coupling a power voltage to an output at an edge-trigger of a PWM control sig... | 01/18/2011 |
| RE42037 | Programmable current-sensing circuit providing continuous temperature compensation for DC-DC converter A current-sensing and correction circuit having programmable temperature compensation circuitry that is incorporated into a pulse width modulation controller of a buck mode DC—DC converter. The front end of the controller contains a sense amplifier, having an inpu... | 01/18/2011 |
| 7834597 | System and method for AC voltage regulation In an embodiment, a power converter system is provided for AC voltage regulation. The power converter system receives an AC input voltage at an input terminal and provides an AC output voltage to a load at an output terminal. A main bi-directional switch is coupled ... | 11/16/2010 |
| 7834598 | Thermally optimized architecture for switching regulators In a preferred embodiment for use in step-down (buck) DC-DC converters that may operate, at least part of the time, at high duty cycles (>50%), the power dissipation in the high side switch is effectively monitored and the switching frequency of the converter is low... | 11/16/2010 |
| 7830128 | Switching regulator circuit for operation as a switching device in a switching mode and a passive device in a passive mode A switching regulator circuit is provided for operation as a switching device in a switching mode and as a passive device in a passive mode. A controller is provided for operating the circuit in a switching mode and a passive mode. Additionally, a single transistor ... | 11/09/2010 |
| 7825642 | Control system optimization via independent parameter adjustment A method for optimizing operation of a feedback system may include generating a control signal according to a control parameter, regulating an output of the feedback system via the control signal, and monitoring the control parameter. In response to the monitoring i... | 11/02/2010 |
| 7821238 | Feedback loop compensation for buck/boost switching converter A system and a method are disclosed for providing an optimized feedback loop compensation for a buck/boost switching converter circuit. The buck/boost switching converter circuit may be operating in either a continuous conduction mode boost mode, or a continuous con... | 10/26/2010 |
| 7812578 | DC-DC converter A DC-DC converter includes a series circuit of a main switch and a choke coil and an output capacitor connected to one end of the series circuit and outputs a DC voltage from the one end of the series circuit. A first MOS transistor is connected in parallel to the s... | 10/12/2010 |
| 7808219 | Method and apparatus of capacitor divider based offline AC-DC converter An AC/DC power converter has, as its first stage, a capacitor divider and rectifier and, as the second stage, a switch mode power supply. This configuration may be suitable for low power low voltage aerospace applications. The benefits of the circuit may include sma... | 10/05/2010 |
| 7786711 | Auxiliary turn-on mechanisms for reducing conduction loss in body-diode of low side MOSFET of coupled-inductor DC-DC converter Conduction loss in the body-diode of a low side MOSFET of a power switching stage of one phase of a coupled-inductor, multi-phase DC-DC converter circuit, associated with current flow in the output inductor of that one phase that is induced by current flow in a mutu... | 08/31/2010 |
| 7782024 | Switching control circuit A switching control circuit comprises: an error amplifying circuit configured to output an error voltage obtained by amplifying an error between a feedback voltage corresponding to an output voltage and a lower voltage selected out of a first reference voltage incre... | 08/24/2010 |
| 7782025 | Semiconductor device and power supply device using the same A semiconductor device capable of reducing an inductance is provided. In the semiconductor device in which a rectification MOSFET, a commutation MOSFET, and a driving IC that drives these MOSFETs are mounted on one package, the rectification MOSFET, a metal plate, a... | 08/24/2010 |
| 7777458 | DC-DC converter A Single Ended Primary Inductance Converter (SEPIC) fed BUCK converter includes: a first switch configured to open or close according to a first signal; a SEPIC portion coupled to the first switch and coupled to an energy source, the SEPIC portion comprising a first... | 08/17/2010 |
