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| Number | Title | Issue Date |
| 8183840 | Voltage converter A voltage converter including a first transistor, a second transistor, an inductor and a control module is provided. The first transistor has a source terminal receiving an input signal, and a body terminal receiving a first bias voltage. The second transistor has a... | 05/22/2012 |
| 8169199 | Power supply with overvoltage protection by zero current stagnation detection It is determined that a periodic zero current stagnation state is reached to correct a voltage command of a smoothing capacitor downward by a predetermined voltage when a state where a current (reactor current) flowing through a coil in a dead time when switching el... | 05/01/2012 |
| 8169198 | Anti-ring asynchronous boost converter and anti-ring method for an asynchronous boost converter The phase node voltage or the PWM signal in an asynchronous boost converter is monitored to detect a phase node voltage ringing. When a phase node voltage ringing is detected, a detection signal is asserted to establish a bypass path to bypass the inductor of the co... | 05/01/2012 |
| 8143867 | Electric power supply device In an electric supply device of the present invention, since a semiconductor element T1 is interrupted before a drain voltage V1 of the semiconductor element T1 is lower than an in-phase input minimum voltage, a load circuit can be assuredly pro... | 03/27/2012 |
| 8143865 | Average current mode controlled converter having a buck mode, a boost mode, and a partial four-switch mode An average current-mode controlled converter has a buck mode, a boost mode, and a four-switch mode. In one example, the converter operates in one of the three modes, depending on the difference between the converter output voltage VOUT and the converter input voltag... | 03/27/2012 |
| 8143866 | Control device for power factor correction device in forced switching power supplies Herein described is a control device of a device for the correction of the power factor in forced switching power supplies; said device for the correction of the power factor comprises a converter and said control device is coupled to the converter to obtain from an... | 03/27/2012 |
| 8134347 | Apparatus and method for recycling the energy from load capacitance The present invention provides a voltage regulator/power converter capable of bidirectional power propagation, fitted with controls capable of raising and lowering voltages with unprecedented speed and accuracy. The bidirectional capability allows energy stored in c... | 03/13/2012 |
| 8134348 | DC-DC converter A DC-DC converter includes an error amplifying circuit to output an error signal by amplifying differences between a reference voltage and a feedback voltage for an output voltage generated by switching an output transistor between on and off, a triangular wave gene... | 03/13/2012 |
| 8129959 | Start-up circuitry and method for power converter In one embodiment, circuitry is provided for startup of a power converter. The circuitry includes a bias capacitor operable to be charged for providing energy to a controller of the power converter. A divider circuit is coupled to a voltage source. Current flows thr... | 03/06/2012 |
| 8125199 | Load control module A load control module suitable for an electrical equipment is disclosed, wherein the electrical equipment is coupled to a switch. The load control module includes an energy storage unit, a microprocessor, and a pulse control unit. The energy storage unit still outpu... | 02/28/2012 |
| 8125198 | Multi-function modulator for low-powered, wired and wireless command, control, and communications applications An amplitude, phase and frequency modulator circuit is provided with the circuit containing a periodically driven switch. The circuit connects a DC power source and a resistive load. Periodic operation of the switch generates a square-wave of voltage across the load... | 02/28/2012 |
| 8120334 | System and method for phase management in a multiphase switching power supply A system and method for managing phases in a multiphase switching power supply turns off a phase in light load conditions and turns on a phase in heavier load conditions. The increase or decrease in the number of phases changes the efficiency of the power supply in ... | 02/21/2012 |
| 8115459 | ESR zero estimation and auto-compensation in digitally controlled buck converters One embodiment of the present invention is a digitally controlled DC-DC converter comprising of a power stage including at least one switch and an output capacitor. A digital controller can control the switching of the at least one switch. The digital controller can... | 02/14/2012 |
| 8106634 | Switching power supply and portable device A switching power supply includes a switching element connected to a power supply voltage and performs ON and OFF operation; a control circuit; a coil; a capacitor connected to the coil and performs a rectifying operation with the coil; an oscillator to output an os... | 01/31/2012 |
| 8098056 | Bidirectional converter and electronic device Provided is a bidirectional converter which has flexibility to be applicable in various conditions and performs stable switching of operation mode at high efficiency. An electronic device which supplies power in various conditions and operates with excellent efficie... | 01/17/2012 |
| 8098055 | Step-up converter systems and methods Methods and systems with a step-up converter are provided based on a boost converter. In one aspect, a step-up converter includes: a boost converter having a first inductor; a second inductor paired on a core with the first inductor; and a rectifier circuit coupled ... | 01/17/2012 |
| 8093873 | Method for maximum power point tracking of photovoltaic cells by power converters and power combiners This invention relates to a method for Maximum Power Point Tracking (MPPT) a photovoltaic cell by a power converter that provides an output current at voltages useful to operate electronics or charge batteries. This invention also relates to a method for Maxi... | 01/10/2012 |
| 8093872 | Method for Maximum Power Point Tracking of photovoltaic cells by power converters and power combiners This invention relates to a method for Maximum Power Point Tracking (MPPT) a photovoltaic cell by a power converter that provides an output current at voltages useful to operate electronics or charge batteries. This invention also relates to a method for Maximum Pow... | 01/10/2012 |
| 8085005 | Buck-boost converter with sample and hold circuit in current loop In an average-current mode control type buck-boost PWM converter, a sample and hold circuit is inserted in the current loop to avoid problems associated with ripple of the average inductor current demand signal. The rippling average inductor current is generated by ... | 12/27/2011 |
| 8072194 | Boost snubber circuit structure A boost snubber circuit structure applied in a power supply having a boost circuit and a power conversion unit, wherein the boost circuit includes a boost unit connected to a switch element, a boost control unit for generating a driving signal to drive the switch el... | 12/06/2011 |
| RE42947 | Circuits, systems, methods, and software for power factor correction and/or control Circuits, systems, methods and software for controlling a power conversion and/or correcting and/or controlling a power factor in such conversion(s). The present invention generally takes a computational approach to reducing or minimizing zero current periods in the... | 11/22/2011 |
| RE42946 | Circuits, systems, methods, and software for power factor correction and/or control Circuits, systems, methods and software for controlling a power conversion and/or correcting and/or controlling a power factor in such conversion(s). The present invention generally takes a computational approach to reducing or minimizing zero current periods in the... | 11/22/2011 |
| 8063613 | Power converter driver with split power supply A power converter driver that is supplied with two different voltages. ... | 11/22/2011 |
| 8063614 | System for actuating portable electronic devices A system for actuating portable electronic devices includes a power supply circuit for providing an electric potential, a regulating circuit connected to the power supply circuit for regulating the electric potential provided by the power supply circuit, and an actu... | 11/22/2011 |
| 8040114 | Method and apparatus to increase efficiency in a power factor correction circuit A controller for use in a power factor correction (PFC) converter includes a power factor correction controller circuit coupled to output a drive signal to switch a power switch between an on state and an off state to transfer energy to an output of the PFC converte... | 10/18/2011 |
| 8030907 | Accelerated response to load transients in PFM DC-to-DC converters A pulse generator circuit in a DC-to-DC converter may be configured to generate pulses that have a frequency that increases in response to increases in the load on the DC-to-DC converter. The pulse generator circuit may be configured to cause each pulse to have a co... | 10/04/2011 |
| 8030906 | Switching power source apparatus and control method thereof A switching power source apparatus includes a storage unit to store energy obtained from input power supplied to the storage unit, and to output at least of the stored energy as output power; a first switch; a second switch connected in series with the first switch,... | 10/04/2011 |
| 8026700 | DC to DC converter having switch control and method of operation In a D.C. to D.C. converter, an input voltage is received via an inductor at an input terminal and stored onto a capacitor of an integrator. A first switch is coupled between the input terminal and a reference terminal such as ground and thereby fluxes the inductor.... | 09/27/2011 |
| 8018207 | Switching regulator A switching regulator is disclosed that uses a non-linear amplifier and is capable of PWM control operation at high frequencies with a simple circuit configuration and without increasing current consumption. The switching regulator includes a switching unit, an indu... | 09/13/2011 |
| 8008897 | Boost converter with integrated high power discrete FET and low voltage controller A boost converter for high power and high output voltage applications includes a low voltage controller integrated circuit and a high voltage, vertical, discrete field effect transistor, both of which are packed in a single package. ... | 08/30/2011 |
| 8008899 | Method of controlling a DC-DC convertor in discontinuous mode A DC-DC converter includes an induction coil cooperating with two switches, which operate alternately, to supply output voltage of a determined level relative to input voltage. The converter control method includes, in each cycle, a first phase of first duration wit... | 08/30/2011 |
| 8008898 | Switching regulator with boosted auxiliary winding supply A boosted auxiliary winding power supply for a switched-power converter circuit provides operating voltage for control and other circuits early in the start-up phase of converter operation. A boost circuit has an input coupled to the auxiliary winding to boost the v... | 08/30/2011 |
| 7994757 | DC-DC converter To securely detect the short-circuited state of a rectifier without detecting current and to protect a switching device in a DC-DC converter, in a state in which the potential at the connection point of the rectifier and the switching device is detected and a drive ... | 08/09/2011 |
| 7990116 | Modulator with linear period stretching capability A modulator for use with a voltage regulator includes an input for receiving an input voltage, an output for providing a periodic triangular wave form and at least one input for receiving an indication that the voltage regulator is in a discontinuous current mode of... | 08/02/2011 |
| 7969125 | Programmable power control system A power control system includes a switching power converter and a programmable power factor correction (PFC) and output voltage controller. The programmable PFC and output voltage controller generates a control signal to control power factor correction and voltage r... | 06/28/2011 |
| 7969126 | Amplifier employing interleaved signals for PWM ripple suppression An amplifier having improved distortion characteristics is set forth. The amplifier includes an interleaved PWM amplifier that generates interleaved PWM pulses in response to a modified input signal and one or more carrier signals. The interleaved PWM pulses of the ... | 06/28/2011 |
| 7952332 | Voltage generator arrangement and method for voltage conversion A voltage generator arrangement which comprises a voltage converter (40) and a polarity detection circuit (10). The voltage converter (40) is coupled to a supply voltage terminal (9) and an output terminal (7) and comprises a first... | 05/31/2011 |
| 7944189 | Load driving device and portable apparatus utilizing such driving device A load such as an LED and a constant-current source are connected in series with each other between the node of a dc-dc conversion type power supply circuit providing an output voltage and the ground. The constant-current source provides a constant current Io, the m... | 05/17/2011 |
| 7944188 | Power converter circuits having bipolar outputs and bipolar inputs A new bipolar output boost converter for ac input applications is revealed. The new boost converter is bridgeless, i.e., it does not require use of a line frequency diode rectifier which improves the efficiency of the converter significantly. The new bipolar boost c... | 05/17/2011 |
| 7940030 | DC-DC converter with current overload protection circuit and method A DC-DC converter including: a switch, having a control terminal receiving a control signal, and a conduction terminal supplying a current; a load, coupled to the conduction terminal of the switch and selectively receiving the current; a control circuit, receiving a... | 05/10/2011 |
