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7629781 |
Multi-output switching power supply
A multi-output switching power supply of the present invention includes: a series resonant circuit which is connected in parallel with a first switching element or a second switching element, and...
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7616455 |
Power factor correction using current sensing on an output
A method and apparatus for circuit conditioning, such as for providing power factor correction, is provided, using existing or minimal additional circuitry, at minimal or no additional cost to the...
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7613015 |
Voltage converter
The invention relates to a voltage converter for converting a primary/secondary voltage into a secondary/primary voltage, comprising at least one controlled switch, wherein a control circuit...
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7602165 |
Phase control device for DC/DC converter
A phase control device for use with a voltage-boosting DC/DC converter includes a current sensor for detecting a current flowing through at least one of the primary and secondary windings of a...
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7602620 |
Controller for power converter
A controller for providing out of phase drive signals to a power converter having at least a first power unit and second power unit. The controller may comprise input circuitry adapted to receive a...
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7599199 |
Power converter switch control
A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches...
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7596006 |
Reducing output ripple from a switched mode power converter
The present invention pertains to a switching regulator having two inductors that discharge stored energy during the switching operation to an output capacitor, which integrates the pulses and...
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7593241 |
Hybrid power supply system
A hybrid power supply system including piezoelectric and ferrite transformers for driving a discharge lamp is provided. Specifically, the hybrid power supply system includes a rectifier/filter, a...
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7586759 |
Power source apparatus
The number of switches on the primary winding side of a transformer is decreased and ripples contained in the output voltage are greatly reduced. In a state I, Sia and Sib are switched ON, in a...
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7586298 |
Chipset for isolated power supply with new programmable synchronization architecture
A chipset for an isolated power supply having an innovative oscillator includes a primary controller and a secondary controller. The primary controller can have the control and drive circuitry for...
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7579789 |
Device for driving light sources
A driving device for driving a lamp (L) includes a power stage circuit ( 21 ), a transformer circuit ( 22 ), a voltage dividing circuit ( 23 ), an inrush current sensing circuit ( 24 ), and a...
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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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7564701 |
Method and apparatus for regulating an output current from a power converter
Techniques are disclosed to control a current through a load to be coupled to an output of a power converter. In one aspect, a power converter includes an energy transfer element coupled between an...
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7564700 |
Power supply system and apparatus
The present invention relates to a switched mode power supply with programmable digital control and to a power supply system comprising a plurality of switched mode power supplies. The input...
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7561446 |
Double-clamped ZVS buck-boost power converter
A transformer-coupled buck-boost DC-DC power converter is disclosed. An active clamp circuit is provided to form a resonant circuit with the transformer to control the slew rate of the secondary...
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7554827 |
Electromagnetic coupling galvanic isolated solid state relay with output feedback
A solid state relay is provided herein, which utilizes an electromagnetic coupling device for galvanic isolation and providing feedback from the output side to the system side. The solid state...
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7554822 |
Power converter for led large area light source lamp
Power converter for receiving an input current at an input voltage and for providing an output current at an output voltage. The power converter comprises a transformer ( 133 ) having a primary (...
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7548435 |
Zero-voltage-switching DC-DC converters with synchronous rectifiers
A DC-DC converter includes an inductor, a synchronous rectifier (SR) connected to the inductor, and an active switch connected to the inductor and the SR. An active resonant tank (ART) cell is...
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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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7535210 |
Predictive duty ratio generating circuit and method for synchronous boost converters operating in PFM mode
A synchronous DC-to-DC converter includes an inductor coupled to receive an input voltage, a first transistor having a source coupled to a first reference voltage and a drain coupled to the...
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7535733 |
Method of controlling DC-to-DC converter whereby switching control sequence applied to switching elements suppresses voltage surges at timings of switch-off of switching elements
In a DC-to-DC converter which can convert DC power supplied to a first voltage system circuit, having first and second switching elements, to DC power at a boosted voltage, produced from a second...
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7525820 |
Inverter
Primary and secondary regions are electrically insulated from each other. The first and second pulse transformers are provided to the respective transistors in the switching circuit. Secondary...
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7525826 |
Switching power supply apparatus and method
Configurations provide reduction in the hum and the weak shocks that are produced in audio equipments where electrical power is supplied. Switching electrical power sources include, a rectification...
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7525296 |
Spread spectrum power converter with duty-cycle error compensation
A spread-spectrum power converter uses an inter-cycle duty-cycle error compensation to achieve a combination of high-precision tracking of a target average duty cycle and a favorable noise...
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7522429 |
DC-DC converter
A DC-DC converter includes a transformer comprising primary and secondary coils. A series connection of the primary coil and a first switch is connected in parallel to a DC power. A series...
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7518885 |
Method and apparatus for a control circuit with multiple operation modes
An apparatus for regulating a power converter with multiple operating modes includes a switch coupled to an energy transfer element coupled between an input and an output of the power converter. A...
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7515439 |
Low voltage stress power converter
A circuit used to convert a DC input to an AC output comprises a pair of series circuits, one or two capacitors, and one transformer. Each of the series circuits is in parallel with the DC input...
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7511972 |
DC-DC converter recycling leakage inductor losses via auxiliary DC regulator
A technique performed by a transformer-coupled DC-DC converter is described for recovering energy, due to leakage inductance in the transformer. A main power supply, providing a power supply...
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7511971 |
Constant voltage circuit for power adapter
Disclosed herein is a constant voltage circuit for a power adapter which is capable of varying an output voltage with loads so as to reduce the charging time of a system battery. The constant...
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7502233 |
DC power supply using either AC or DC input for both
There is provided a power supply for AC/DC and DC/DC conversion which receives the DC power supplied from airplanes, vehicles and vessels as well as normal AC power, and converts the power to DC...
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7474542 |
High voltage power supply
A high voltage power supply for use in a laser printer, multifunction peripheral, or similar device, wherein the high voltage power supply includes a pulse width modulation (PWM) input unit, a high...
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7466565 |
Switching power supply unit and voltage detection circuit
A switching power supply unit is provided, in which a DC input voltage can be detected even if switching operation of the power supply unit is stopped. A switching power supply unit includes: a...
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7466083 |
Protective device for vehicle electronic apparatus
A protective device for a vehicle electronic apparatus, which includes an inverter for converting a direct-current voltage into an alternating-current voltage for the vehicle electronic apparatus,...
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7463498 |
Apparatus for isolated switching power supply with coupled output inductors
A multiphase DC-to-DC power converter has two or more sets of input switches, each set of input switches driving primary windings of an associated transformer. Each transformer has one or two...
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7453239 |
Charging apparatus having a switching element for controlling charging power
A charging device that may perform charging with larger current is provided. The charging device comprises a switching element for increasing or decreasing charging power, a PWM controlling circuit...
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7446512 |
Resonant switching power supply device
For the purpose of providing a resonant switching power supply device having a wide output voltage variable range by changing its switching frequency, the resonance circuit thereof comprises a...
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7436157 |
Device for preparing a supply voltage
A device for preparing a supply voltage contains an input for receiving the supply voltage and a voltage converter for transforming an input voltage present at an input of the voltage converter...
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7430130 |
D-optimized switching converter
A switching converter produces an output signal transmitted to a variable load impedance to produce a load voltage V DD across the load impedance and holds V DD close to a set point voltage V SP ...
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7426119 |
Switching power supply apparatus
A switching power supply apparatus comprising: a first transformer, one end of a primary winding thereof being connected to one end of a secondary winding of a converter transformer; a second...
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7414385 |
Chipset for isolated power supply with new programmable synchronization architecture
The present invention is a chipset for an isolated power supply having an innovative oscillator. Preferably, the present invention includes a primary controller and a secondary controller. The...
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7403400 |
Series interleaved boost converter power factor correcting power supply
A power factor correcting power supply includes an input stage power converter and an output stage power converter. The input stage power converter includes a plurality of series connected boost...
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7400061 |
Soft switched secondary side post regulator for DC to DC converter
A high frequency, full bridge, resonant DC to DC converter provides a main DC output voltage that is regulated by adjusting the phase shift of the input power to a main input transformer and at...
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7391192 |
Apparatus and system for providing transient suppression power regulation
A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one...
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7391627 |
Power converter
A power converter comprises an inductor (LP) and a controllable switch (CF) coupled to the inductor. A switch controller ( 1 ) supplies a periodic switching signal (VC 1 ) which has a repetition...
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7375984 |
Zero voltage zero current switching converter
A power converter circuit includes an input switching circuit, an isolation circuit, a rectifier circuit that includes a least a pair of rectifiers, and an output circuit. The input switching...
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7372709 |
Power conditioning system for energy sources
Apparatus for conditioning power generated by an energy source includes an inverter for converting a DC input voltage from the energy source to a square wave AC output voltage, and a converter for...
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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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7359219 |
Power supply
A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter...
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7345893 |
Boost converter with magnetically coupled and uncoupled inductors
A switching type converter including an input stage and an output stage, the input stage including an input inductor to which an input DC voltage to be regulated is applied, switching component for...
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7339799 |
Switching power supply
A switching power supply includes a first series circuit formed by connecting first and second switching elements in series at both ends of a direct-current power source, a second series circuit...
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