Matches 1 - 50 out of 270 1 2 3 4 5 6 >


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US20120201052 Measurement transducer  
A measurement transmitter connectable galvanically isolated relative to one another and the other components of the measurement transmitter, which is optimized as regards installation space and...
US20140042839 INVERTER DEVICE AND ELECTRIC POWER TOOL  
An inverter device includes: an inverter circuit configured to perform ON/OFF operations with a preset duty cycle to convert a DC power into an AC power and output the AC power to an AC motor; and...
US20120274146 ADVANCED CLOCK SYNCHRONIZATION CIRCUIT FOR SWITCH MODE POWER SUPPLIES  
In a switch mode power supply, a circuit and method for switching between an internal clock and an external synchronization clock when a stable external clock has been detected, and for switching...
US20110235369 SYNCHRONOUS RECTIFIER POST REGULATOR  
Methods and apparatus for regulating a synchronous rectifier DC-to-DC converter by adjusting one or more existing synchronous rectifiers in the converter are provided. By regulating an existing...
US20140016359 POWER CONVERTERS WITH QUASI-ZERO POWER CONSUMPTION  
A power converter system, method and device powers a load when coupled to the load and draws a quasi-zero amount of power from the power supply when not coupled to the load. The power converter...
US20140001979 LEADING-EDGE PHASE-CUT BLEEDER CONTROL  
A bleeder arrangement for a phase-cut circuit for a high-impedance load and having a leading-edge phase-cut device is disclosed, the bleeder arrangement comprising: a controllable current sink...
US20130083562 POWER SUPPLY, POWER MANAGEMENT DEVICE APPLIED TO A POWER SUPPLY, AND METHOD FOR PERFORMING BROWN-OUT PROTECTION AND OVERHEAT PROTECTION OF A POWER MANAGEMENT DEVICE  
A power supply can provide brown-out protection and overheat protection. The power supply includes a rectifier, a transformer, and a power management device. The rectifier is used for receiving an...
US20120069603 ADAPTER POWER SUPPLY  
An adapter power supply includes an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary...
US20150023062 SWITCHING POWER SUPPLY DEVICE  
In a switching power supply device having low loss in synchronous rectifying switches, exhibiting high power efficiency, and not causing troubles by reverse current in the switches. A secondary...
US20130343090 ACTIVE BLEEDER, ACTIVE BLEEDING METHOD, AND POWER SUPPLY DEVICE WHERE THE ACTIVE BLEEDER IS APPLIED  
An active bleeder according to an exemplary embodiment of the present invention includes a bleed switch coupled to the input voltage and an active bleeding controller generating a bleed reference...
US20140321167 POWER SUPPLY WITH VOLTAGE OUTPUT RESPONSIVE TO LOAD DEMAND  
A method for a power adapter to selectively provide a first and a second output voltage may comprise coupling a rectified and filtered transformer input signal to a primary winding of a...
US20120307527 DC-DC CONVERTER FOR ELECTRIC POWER USING A DC ELECTRIC POWER SOURCE  
The converter comprises an inverter and a conversion unit in which a transformer powers a controlled rectifier formed by saturable inductors and power diodes. According to the invention, a series...
US20140355309 SELECTED-PARAMETER ADAPTIVE SWITCHING FOR POWER CONVERTERS  
A selected-parameter adaptively switched power conversion system, for example, includes a counter for determining a period of an output oscillation a power supply switch, where the output...
US20150162838 COORDINATED DIMMER COMPATIBILITY FUNCTIONS  
A system and method includes a controller that is configured to coordinate (i) a low impedance path for a dimmer current, (ii), control of switch mode power conversion and (iii) an inactive state...
US20120188794 ADAPTIVE BLEEDER CIRCUIT  
An adaptive bleeder circuit is applicable to a power converter, in which the power converter has a transformer primary side and a transformer secondary side, and the power converter enables input...
US20110235368 SYSTEM AND METHOD FOR CONVERSION OF HIGH VOLTAGE AC TO LOW VOLTAGE DC USING INPUT VOLTAGE GATING  
A method and apparatus for conversion of high voltage AC to low voltage high current DC without using high voltage capacitors or transformers. A single switch is used to perform both the functions...
US20130250621 HIGH EFFICIENCY AC/DC POWER SUPPLY  
A power supply for converting AC to a regulated DC output current, utilizing two serial switched mode power supplies, the first providing an intermediate DC output voltage with only moderate...
US20120262948 PHOTOVOLTAIC MODULE  
A photovoltaic module includes: a solar cell module including a plurality of solar cells; and a junction box including a capacitor unit attached to one face of the solar cell module and that to...
US20120170323 CHARGING AC ADAPTOR  
A charging AC adaptor includes: a first diode bridge connected to an AC terminal; a chopper controller connected to the first diode bridge; an insulating air core transformer connected to the...
US20140140102 DRIVE TRANSFORMER ISOLATION ADAPTIVE DRIVE CIRCUIT  
A drive transformer isolated-adaptive drive-circuit includes a power supply, a first MOSFET and a second MOSFET, the drain electrode of the first MOSFET coupled with the positive electrode of the...
US20130121032 POWER SUPPLY REGULATION FOR ULTRA-LOW LOAD AND NO-LOAD OPERATION  
A controller of a switching power converter employs a dynamically adaptive power supply regulation approach that improves low-load and no-load regulation to achieve ultra-low standby power in a...
US20130128622 POWER CONVERTING APPARATUS  
A power converting apparatus makes reduction of power loss possible and operates in a two-phase mode. A power converting apparatus of the inventive concept includes I-shaped block cores, each...
US20100309689 Bootstrap Circuitry  
This invention generally relates to a bootstrap circuit for a switch mode power supply, a controller for a switch mode voltage converter, a switch mode flyback converter comprising the bootstrap...
US20130027979 CONVERTERS AND INVERTERS FOR PHOTOVOLTAIC POWER SYSTEMS  
A power system includes a plurality of DC/DC converters and a DC/AC inverter. The plurality of DC/DC converters having outputs electrically connected in parallel for supplying a DC voltage bus to...
US20130336011 Switched Mode Power Supply and a Method for Operating a Switched Mode Power Supply  
A switched mode power supply includes a first switch connected to an input terminal for inputting an input voltage, a second switch, an inductor and an output capacitor, a transformer connected to...
US20050254267 Compensation circuit and drive circuit including such a compensation circuit  
A compensation circuit is provided for use in a drive arrangement for an isolation transformer in series with a capacitor. The compensation circuit applies a compensation voltage to the capacitor...
US20140112023 PRIMARY-SIDE REGULATION FOR ISOLATED POWER SUPPLIES  
A DC-DC converter includes a primary side sense circuit to detect a load current of the DC-DC converter based on reflected current from a secondary winding of the DC-DC converter to a primary...
US20140198533 Bidirectional Power Conversion with Fault-Handling Capability  
A power conversion system includes a unipolar bidirectional power converter with DC terminals and a first controller, and a bipolar bidirectional power converter with DC terminals connected in...
US20110242853 HIGH VOLTAGE POWER SUPPLY  
A high voltage power supply is provided. The high voltage power supply includes an inverter which converts a DC voltage input to the high voltage power supply into a first AC voltage, a...
US20140233264 Single stage PFC power supply  
A single stage power factor correction power supply consists of two transformers: a main transformer and an auxiliary transformer (forward transformer). The main transformer transfers energy from...
US20130194827 SWITCHING POWER SUPPLY  
A switching power supply of certain aspects of the invention includes a minimum dead time generating circuit that generates a minimum dead time from an OFF timing of an ON pulse detected from the...
US20140369084 ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES  
An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a power converter circuit that is electrically...
US20110090715 ISOLATED SWITCHING POWER SUPPLY APPARATUS  
A transformer includes a first secondary winding, a second secondary winding, and a third secondary winding. The second secondary winding and the third secondary winding are wound to include the...
US20070236964 Method for operating a traction converter circuit for coupling to an electric DC voltage network  
A method for operating a traction converter circuit for coupling to an electric DC voltage network is stated, where the traction converter circuit comprises a network converter, which network...
US20130250622 SWITCHING POWER-SUPPLY CIRCUIT  
A switching power-supply circuit includes a second rectifying/smoothing circuit arranged to generate a second output voltage by rectifying and smoothing the output of a second secondary winding,...
US20130121033 DC-DC CONVERTER CIRCUIT USING LLC CIRCUIT IN THE REGION OF VOLTAGE GAIN ABOVE UNITY  
The present invention provides a series of DC-DC converter circuit designs, and DC-DC converters based on such circuit design, that provide high input-to-output voltage conversion. The converters...
US20120087154 VOLTAGE SUPPLY DEVICE FOR A LOAD  
A voltage supply device for a load, in particular for a network, has an energy store that can be connected to connection terminals and a voltage transformer with at least one electronic switch. A...
US20140334186 ENERGY-SAVING POWER CONVERTER  
An energy-saving power converter includes a first switch unit, a transformer primary side, a transformer secondary side, a diode subunit, a switch subunit, a comparison unit, a current sensor, and...
US20060133115 Adaptive blanking of transformer primary-side feedback winding signals  
A method of regulating a power converter using a transformer primary-side feedback winding to provide a feedback signal. The feedback signal is selectively blanked based on a signal indicative of...
US20140091718 Power Converter with an Inductor-Inductor-Capacitor Stage and Method of Operating the Same  
A power converter including an inductor-inductor-capacitor stage and method of operating the same. In one embodiment, the power converter includes an inductor-inductor-capacitor (LLC) stage...
US20090161389 SYSTEMS AND METHODS FOR PRECHARGING BOOST CONVERTERS IN DC TO DC POWER CONVERTERS  
A method and apparatus for precharging a DC to DC power converter system is provided. The system includes a boost circuit for generating a boosted output voltage from an input voltage. The input...
US20150091465 Power Supply Circuit and Luminaire  
A power supply circuit includes a rectifying circuit, a power-factor improving circuit, a bridge circuit, a transformer, a rectifying and smoothing circuit, first and second drivers, a power...
US20110141770 POWER SUPPLY DISCONTINUOUS INPUT VOLTAGE EXTENDER  
A system and method for converting a relatively high voltage into a relatively low voltage, the method comprising the steps of: receiving a first series of pulses at the relatively high voltage...
US20130100706 DRIVER CIRCUIT FOR DRIVING A LOAD CIRCUIT  
Driver circuits (1) for driving load circuits comprise transformer circuits (21) with primary side windings to be coupled to source circuits and with secondary side windings to be coupled to the...
US20130336012 Switched-Mode Power Supply and a Two-Phase DC to DC Converter  
The switched-mode power supply includes a first switch connected to an input terminal for receiving an input voltage, a second switch, a first node between the first switch and the second switch....
US20130016531 POWER SUPPLY DEVICE AND METHOD OF CONTROLLING POWER SUPPLY DEVICE  
The present invention includes: a power factor correction circuit configured to correct a power factor; a DC/DC converter configured to convert an output voltage of the power factor correction...
US20130294111 OVERLOAD DETECTION IN A SWITCHED MODE POWER SUPPLY  
A switched mode power supply includes a switching device, the switched mode power supply being operable to convert an input voltage (Vin) to an output voltage (Vout) by switching the switching...
US20120243264 Power Supply Device  
A power supplying device performs both of a suppression of EMI noise and a reduction in an output voltage. In the power supply device, a switching control device that controls a switching element...
US20120140529 Energy Recirculation and Active Clamping to Improve Efficiency of Flyback or Push Pull DC to DC Converters  
The present invention is a new circuit topology to improve the efficiency of a flyback or push-pull converter or any other DC/DC converter that incorporates a transformer and whose switching...
US20130343091 INTEGRATED MAGNETICS FOR SOFT SWITCHING CONVERTER  
In an integrated magnetic component for a switched mode power converter, comprising two magnetic cores forming an 8-shaped core structure and at least two first electric winding wires, wherein at...

Matches 1 - 50 out of 270 1 2 3 4 5 6 >