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8179699 Method for controlling a switching regulator and related switching regulator  
An embodiment of a power-supply controller comprises a switching-control circuit, an error amplifier, and a signal generator. The switching-control circuit is operable to control a switch coupled...
8174852 Asymmetric switch forward converter  
A switching circuit for use in a power converter in one aspect includes a first and second active switch and a first and second passive switch. The first active switch can be coupled to a first...
8159843 Method and apparatus to regulate an output voltage of a power converter at light/no load conditions  
An example apparatus to regulate an output voltage of a power converter at light/no load conditions includes a driver circuit, a feedback circuit, and an adjustable voltage reference circuit. The...
8149598 Switching power supply apparatus  
A switching power supply apparatus according to the present invention includes a switching device and a control circuit, and the control circuit includes: a control terminal through which an...
8144486 Power converter and driving method thereof  
In a power converter, a primary coil receives an input voltage, and a switch includes a first electrode, a second electrode coupled to the primary coil, and a control electrode. An output unit...
8144484 Electronic circuit control element with tap element  
A technique for controlling a power supply with power supply control element with a tap element. An example power supply control element includes a power transistor that has first and second main...
8072305 DC/DC converter  
Primary and secondary coils are provided in the first through section and a coil group is also provided in the second through section. Hence, the surface area over which the coil group extends...
8063697 Self-oscillating driver circuit  
A self-oscillating driver circuit comprises a driver stage, a feedforward path which is coupled to an input of the driver stage, and a feedback path which couples an output of the driver stage to...
8045348 Switching mode power supply controller with high voltage startup circuits  
A controller for a switching mode power supply includes two semiconductor chips. The first semiconductor chip has a high-voltage startup transistor coupled to a high voltage supply input terminal...
8035997 Control arrangement and circuit arrangement for converting a DC voltage into a rectified voltage  
Circuitry includes an acquiring circuit to acquire period and phase information of an oscillation. The acquiring circuit includes a first input electrically coupled to a first connection and a...
8022672 Charger control circuit and charger control method  
The present invention discloses a charger control circuit and a charger control method for controlling a charger having a transformer, the transformer including a primary winding and a secondary...
8022802 Sensor for high voltage environment  
Sensor for measuring electrical parameters in a high voltage environment comprising a high voltage side (4) for connection to high voltage conductors, a low voltage side (6) for connection to low...
8018742 Full-range-duty PWM signal generation method, apparatus, and system using same  
The present invention discloses a full-range-duty PWM signal generation method for an AC-to-DC power conversion, comprising the steps of: generating a saw-tooth signal with a predetermined valley...
8014175 Switching power conversion circuit  
A switching power conversion circuit includes a power circuit, a feedback circuit and a control circuit. The power circuit includes a switching circuit and a first magnetic element. The first...
7995360 Power system with shared clamp reset  
A power supply includes a first power converter, a second power converter, and a clamp reset circuit. The clamp reset circuit is electrically coupled to other components within the first power...
7969039 Method of controlling fuel cell vehicle and method of controlling DC/DC converter apparatus  
A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the...
7961481 Pulse width modulation control circuit applied to charge output capacitor  
A pulse width modulation (PWM) control circuit is applied to a power converter with a charging capacitor. The PWM control circuit includes a PWM signal generator, a first comparator, and a...
7948777 Switching mode power supply and a method of operating the power supply in a power save mode  
A switching mode power supply and a method of operating the power supply in a power save mode. The switching mode power supply includes a first PWM controller and a second PWM controller that are...
7940536 Flyback converter with improved synchronous rectification  
A flyback converter circuit in accordance with an embodiment of the present application includes a DC input operable to receive a DC voltage from a DC voltage source, a transformer including a...
7933131 Power supply and image forming device having the same  
A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an...
7916504 Voltage detection device and voltage detection method  
A voltage detection device that is connected to a DC circuit to which a DC voltage is applied and that detects the DC voltage applied to the DC circuit includes a voltage conversion unit for...
7907042 DC-DC converter with integrated transformer assembly composed of transformer pair  
In an integrated transformer assembly, a common coil member has a first portion alternately wound, for each one electromagnetic turn, around the first core member and around the second core member....
7869227 Power supply apparatus and method  
A method of supplying a power to elements in a power supply apparatus including a primary side and a second side. Particularly, a method of supplying a driving power to an element at the primary...
7839661 Power supply control circuit having controllable switch and liquid crystal display using the same  
An exemplary power supply control circuit (200) includes a first port (201), a second port (202), a third port (203), a controllable switch (280), and a control circuit (270). The first and second...
7834592 Circuit for generating triangular waveform having relatively short linear rise time and substantially long linear fall time  
A circuit includes a pulse transformer having primary and secondary windings. An oscillating waveform is applied to the primary winding to induce an oscillating waveform at the secondary winding. A...
7834793 Self-timed clocked analog to digital converter  
An SAR analog-to-digital converter performs bit decisions in each of a plurality of clock cycles. A sense circuit monitors signals input to a latch within a comparator of the ADC and, when the...
7830675 Switching power supply device and method of starting the same  
To reduce power loss during standby. In a switching power supply device using a first power supply circuit (11) having a small output and a second power supply circuit (12) having a large output,...
7825535 Self-coupled transformer boostbuck circuit  
A self-coupled transformer boostbuck circuit includes a first transformer having a first winding, a second winding and a third winding, a first switch having a first voltage output at its one end,...
7804697 History-independent noise-immune modulated transformer-coupled gate control signaling method and apparatus  
A history-independent and noise-immune modulated transformer-coupled gate control signaling method and apparatus provides robust design characteristics in switching power circuits having a...
7791905 Electrical DC-DC power converter with magnetically coupled switch control circuit  
Power converter with a controllable first switch and a diode and a controllable second switch and a second diode, a transformer with a primary winding and a secondary winding, of which the...
7791906 DC to DC converter module  
Lower surface terminals are disposed at the lower surface of a magnetic substrate. An upper surface electrode is disposed at the upper surface of the magnetic substrate. A control circuit, an input...
7787262 Capacitor charging methods and apparatus  
A capacitor charging circuit is provided with a primary side output voltage sensing circuit including an RC network having an RC time constant with a predetermined relationship to the RC time...
7773391 Direct current to direct current converter with single ended transformer and pulse reverse circuit  
An exemplary DC to DC converter (200) includes a first DC input (210) connected to a first DC power supply; a second DC input (220) connected to a second DC power supply; a transformer (230)...
7751209 Switching power supply equipment  
A switching power supply equipment has a function to protect a power supply from abnormalities such as an output short-circuit. An output signal from an error amplification circuit to amplify a...
7746670 Dual-transformer type of DC-to-DC converter  
A first AC/DC converter circuit is coupled via two transformers to a second AC/DC converter circuit, the first AC/DC converter circuit having a symmetrical configuration of two switching elements...
7738265 Control system for a voltage converter and method  
A control arrangement for a voltage converter includes a first input electrically connected to a device configured to sense a first current in a primary side of a transformer and a first output...
7729134 Power conversion circuit, driving method and drive unit thereof  
A power conversion circuit capable of varying an output voltage within a range from a negative voltage lower than a ground voltage to a positive voltage higher than a supply voltage, and a driving...
7706155 Current mode half-bridge power converter  
The invention relates to a half-bridge power converter controller that employs current mode control. The power converter controller includes pulse modulation circuitry, error circuitry, and...
7656687 Modulated transformer-coupled gate control signaling method and apparatus  
A modulated transformer-coupled gate control signaling method and apparatus provides reduction of circuit complexity and robust design characteristics in switching power circuits having a...
7646616 Capacitor charging methods and apparatus  
A capacitor charging circuit is provided with a primary side output voltage sensing circuit for generating a control signal indicative of whether the output voltage has reached a desired level. The...
7639516 Switching power source device  
The ON duration of an N channel MOS transistor is set based on a target voltage at a node between a resistor and a light receiving element of a photocoupler. A comparator compares the target...
7613017 Gated pulse power converter systems and methods  
The present invention is generally directed to power converter systems and methods that regulate an output voltage by gating a fixed energy pulse. For example, a comparator may be used to gate a...
7596002 Power conversion system and method  
A power conversion system comprises a converter coupled to a power source and configured to convert a DC power to a variable AC power signal. The power conversion system may further comprise a...
7573730 Charging device with boundary mode control  
A charging device with boundary mode control is disclosed. The charging device includes a transformer, a power switch, a detection circuit and a pulse-width modulation (PWM) controller. The power...
7564903 Method and apparatus for measuring reflected voltage of transformer  
A method and apparatus of sampling reflected voltage signal of a transformer is proposed. Sampling signals are used for generating hold voltages by sequentially sampling the reflected voltage from...
7542308 DC-DC converter  
A DC-DC converter is provided with a control circuit 6 which comprises a drive signal generator 11 for producing on-off signals to a control terminal of a MOS-FET 3 in synchronization with pulse...
7499292 Power device and power adjusting method  
A power device includes a transformer, a control signal outputting unit, and a power adjusting unit. The transformer has a primary coil and a secondary coil. The control signal outputting unit...
7480156 Tapped inductor power conversion networks  
The subject invention reveals new three terminal tapped inductor canonical cells for non-isolated power conversion. The canonical cells achieve reduced semiconductor component stresses for...
7450402 Soft switching high efficiency flyback converter  
DC-DC converters such as flyback converters achieve self-regulation by communication information between primary and secondary circuits through the power transformer. Operating in accordance with a...
7443699 Negative current compensation method and circuit  
A power supply controller (10, 60, 70) uses a negative current (36) of a power transistor (16, 71) to detect the valley point for enabling the power transistor when driving an inductor (17). The...
Matches 1 - 50 out of 377 1 2 3 4 5 6 7 8 >