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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7426120 |
Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converter
The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control...
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7405952 |
Power supply device
A power supply device has first and second terminals, a transformer, a switching element and an auxiliary power supply element. The first and second terminals receive input power having an input...
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7375995 |
Power factor correction circuit
A power factor correction circuit used for regulating the phase of a DC current outputted from a rectifier unit in a power supply includes an energy inductor, an output diode, a switch unit, a...
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7365996 |
Switched-mode power supply
A switched-mode power supply for converting a DC input voltage (Uzk) into an output voltage (Ua). The switched-mode power supply comprises a circuit (AST) for triggering at least one controlled...
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7362077 |
Pre-charge method for isolated boost converter
A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module...
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7355870 |
Switching mode power supply and method for outputting voltage therefrom
A switching mode power supply and a method for outputting voltage therefrom are provided, where a transformer receives rectified alternating current (AC) voltage and transforms a voltage value or a...
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7355864 |
Switching regulator and its control method
A switching regulator has an input voltage detection circuit which inputs a voltage applied to a rectifier diode 7 connected in series with the secondary side of a transformer and generates a...
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7336057 |
DC/DC converter
A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in...
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7307334 |
Integrated circuit having features to limit substrate current
A technique includes forming a first well in a substrate and forming a second well in the substrate. The first well is electrically isolated from the second well. The technique includes forming an...
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7280376 |
Primary side voltage sense for AC/DC power supplies capable of compensation for a voltage drop in the secondary
In a method and system for providing isolated power, a flyback controller includes a transformer operable to receive a primary voltage input and generate a secondary voltage output. A switch...
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7257008 |
Start-up apparatus for power converters
A start-up apparatus for a power supply is presented. A charging path from an input voltage to a holding capacitor is cut off after the power converter starts up. The start-up apparatus includes a...
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7254045 |
Power supply circuit and electronic equipment
A power factor is improved using a simplified structure without particularly providing a power factor improving circuit, and high efficiency is obtained. For this purpose, one terminal of a...
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7254044 |
Current limit circuit and power supply including same
The present invention is directed generally to a power supply. According to various embodiments, the power supply includes at least one DC/DC converter. The converter includes a primary switch...
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7248485 |
Circuit arrangement with power factor correction as well as a corresponding appliance
The circuit arrangement has a mains connection, a mains switch and a switched-mode power supply which contains a power factor coil for power factor correction. In this case, the mains switch has...
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7236086 |
Power converter configuration, control, and construction
A transformer having galvanically isolated windings defines a primary side and a secondary side of a power conversion apparatus. A switch couples power from a source on the primary side via the...
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7199649 |
Switching power supply
A switching power supply unit, for switching a rectified voltage supplied to a pulse transformer to supply a specified load voltage to a load connected to the secondary winding of the pulse...
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7193396 |
DC converters having buck or boost configurations
An inductor in a series path of a DC converter having a buck or boost configuration is constituted by a transformer with windings in series with switches of the converter. A transformer turns ratio...
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7184279 |
Solid state switching circuit
A solid state switching circuit utilizes a transformer in series with the circuit's switching device by which energy initially stored in the primary of the transformer is recovered in resonant...
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7164568 |
Bi-directional pin or nip low capacitance transient voltage suppressors and steering diodes
A bi-directional low capacitance TVS using a PIN or NIP diode is disclosed. Bi-directional low capacitance TVS protection circuit ( 1000 ) consists of two pairs of TVS diodes ( 1001 ), ( 1003 ) and...
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7151679 |
Adaptive leading edge blanking circuit
An adaptive leading edge blanking circuit in which the leading edge blanking time is reduced at low to very low power levels of an SMPS, but is substantially constant at medium to high power...
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7151394 |
Phase shifting and PWM driving circuits and methods
The present invention provides an inverter controller comprising a drive circuit that generates a plurality of switch drive signals for inverter applications. In some exemplary embodiments, the...
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7142438 |
Extended output range switching power supply with constant power feature
The Invention is a 360 watt bench has an exceptionally wide output range that allows it to replace up to four conventional units. The output voltage can be manually adjusted with coarse and fine...
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7116562 |
Synchronous rectification switching power supply
A fly-back type synchronous rectifying switching power supply device in which a rectifying element is turned off before the main switch is turned on even when the on-time of a main switch element...
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7095308 |
Step-up transformer
Open ends of a number of secondary windings are fixed by winding them around a film projection portion formed by cutting and raising insulating films provided between the layers of the secondary...
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7092259 |
Active clamp DC/DC converter with resonant transition system
A dc-dc converter is disclosed comprising an active clamp topology, including an active clamp resonant transition system to provide substantially zero or reduced voltage for turn-on of the primary...
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7088596 |
Switching power supply with novel common mode filter arrangement
The present invention is to provide a switching power supply device for preventing the change of characteristic of the line filter due to filler such as resin which covers the circuits. A switching...
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7084486 |
Uni-directional PIN or NIP conducting low capacitance transient voltage suppressors and steering diodes
A device for protecting I/O lines using PIN or NIP low capacitance transient voltage suppressors and steering diodes are disclosed. In an exemplary embodiment, a two (2) terminal device with a...
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7076206 |
System for wireless transmission of electrical power, a garment, a system of garments and method for the transmission of signals and/or electrical energy
The invention describes a system for electrical transmission in the field of garments and a corresponding transmitter for this. Electrical circuits in garments are coupled, preferably inductively...
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7075799 |
Self-driven synchronous rectifier circuit
A DC-DC power converter has a transformer with a primary side and secondary side. A first power transistor is coupled between a first end of a first winding of the secondary side and a ground...
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7046530 |
Method and apparatus for current limiting of an output of a DC-to-DC converter
A method for current limiting of an output of a DC-to-DC converter begins by determining a current loading duty cycle of the output of the DC-to-DC converter (i.e., the present duty cycle given the...
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7046525 |
Bidirectional flyback switch mode power supply (SMPS)
The present invention relates to a bidirectional flyback switch mode power supply (SMPS), such as a bidirectional flyback converter, and a method for operating it. The SMPS comprises a transformer...
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7038922 |
Direct energy transfer converter
The invention concerns a direct energy-transfer converter of the AC/AC or DC/DC type, including a self-regulated synchronous rectifier, in which the rectifier switches are controlled through one or...
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7012817 |
Converter with integrated active clamp circuit and bias circuit
A converter includes a transformer having a primary winding, a secondary winding and an auxiliary winding, a first switching device for connecting an input voltage to the primary winding of the...
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6985369 |
DC-DC converter
A DC-DC converter achieves a high level of a signal superimposed in an AC manner onto the output of an insulator such as a photocoupler, and there are very few limitations in the aspects of...
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6967585 |
Input voltage sense circuit in a line powered network element
Methods and systems of monitoring voltage input to network elements are provided. One method includes receiving an input voltage for a line-powered network element, applying the input voltage...
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6956753 |
Method and system for providing a temperature compensated feedback signal
An electrical circuit for providing a temperature compensated feedback signal includes a first electrical component and a first amplifier. The first electrical component exhibits a first...
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6947297 |
Active resonant snubber for DC-DC converter
The present invention proposes an improved circuit design and configuration of a DC-DC converter with resonant reset. In this present invention, the active resonant snubber in parallel to a primary...
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6947296 |
Switching power supply circuit and electronic device
A surge voltage detection circuit compares a stipulated voltage V S with the drain voltage of a switching element, the drain voltage being applied by a smoothing capacitor. The comparison result...
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6930894 |
Switching power supply and distributed parameter structure
A switching power supply causes fewer losses, being capable of suppressing surges generated at a switching element, and providing improved conduction noise characteristics. The present invention is...
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6903944 |
Active clamp DC/DC converter with resonant transition system
A DC—DC converter is disclosed comprising an active clamp topology, including an active clamp resonant transition system to provide substantially zero or reduced voltage for turn-on of the...
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6895046 |
System and method of providing a spread spectrum pulse width modulator clock
A system and method of creating a pulse train signal of a pulse width modulator whose fundamental frequency is time-varying is disclosed. The electrical system includes a pulse width modulator...
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