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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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7362594 |
Adaptive resonant switching power system
A resonant switching power system operates with two resonant frequencies. A first frequency depends on the secondary leakage inductance of an output transformer and capacitor. The first frequency...
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7359221 |
Power supply for use in an electronic energy meter
A three-phase electronic electricity meter that includes a power supply circuit operable to create a constant voltage output when receiving a variable voltage input. The power supply circuit of the...
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7345895 |
Adaptive multi-level threshold system and method for power converter protection
System and method for protecting a power converter. The system includes a compensation system configured to receive an input signal and generate a control signal, a cycle threshold generator...
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7336507 |
Power supply outputting multiple voltages
A power supply includes a transformer, a second output line, a second output line, a controller, and a current bypass circuit. The transformer has a primary side and a secondary side. The first...
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7333351 |
Electronic circuit control element with tap element
A technique for controlling a power supply with power supply control element with a tap element. In one embodiment, a power supply regulator includes a power transistor having first, second, third...
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7330361 |
Capacitor charging module
Disclosed is a capacitor charging module, comprises: a power switch; a power delivery device controlled by the power switch, for providing a charging current to the output capacitor according to a...
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7330360 |
Driving apparatus of display device and DC-DC converter
A DC-DC converter is provided, which includes a transformer including a primary coil and a secondary coil, a boost converter connected to the primary coil of the transformer and generating a first...
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7330359 |
Power supply unit
The present invention is directed to a power supply unit that provides large power supply to the load. The voltage detector 51 generates a voltage detection signal by detecting the voltage...
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7312783 |
Light emitting element drive device and display apparatus
A light emitting element drive circuit and a display system able to simultaneously perform constant current control and PWM control and able to perform a stable adjustment of luminance over a wide...
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7312596 |
Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor
A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual...
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7310251 |
Control circuit having two-level under voltage lockout threshold to improve the protection of power supply
The invention presents a switching power control circuit including two levels of under voltage lockout to improve the protection of the power supply. An input terminal of control circuit is...
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7301319 |
Methods and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply
A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal...
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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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7280374 |
Single-stage power factor correction circuit
The present invention discloses a single-stage power factor correction circuit that includes a first rectifier, a second rectifier, a full bridge rectifier, a capacitor, a seventh rectifier, a fly...
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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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7254046 |
DC-DC converter
In a DC to DC converter, first and second primary windings are magnetically coupled to a first secondary winding. Third and fourth primary windings are magnetically coupled to a second secondary...
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7239532 |
Primary-side feedback switching power supply
The present invention discloses a primary-side feedback switching power supply that uses a sample-and-hold circuit to obtain a corner voltage of a harmonic wave voltage while the primary-side...
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7236378 |
Signal distribution to a plurality of circuit units
A device for distributing a signal, in particular a clock signal or a command/address signal from a signal source to a plurality of circuit units, includes a transformer. The transformer has a...
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7236078 |
Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components
A method of transferring energy is disclosed. In one aspect, a method includes transferring energy from a first winding wound around a transformer core to a second winding wound around the...
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7233505 |
High efficiency flyback converter with primary, secondary, and tertiary windings
A flyback converter is comprised of a primary side and a secondary side. The primary side includes a primary winding and a switch both connected in series. The secondary side includes a secondary...
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7227762 |
Fine-tuning circuit for the winding voltage of a transformer
A fine-turning circuit is used for adjusting the output voltage of a main transformer in an electrical power convert device and solving the problem of turns granularity of conventional...
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7224589 |
Inverter circuit for producing power factor correction effect
Provided is an inverter circuit including a rectification and filter circuit and an inverter driver circuit interconnected the rectification and filter circuit and a load. The inverter driver...
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7221128 |
Converter with start-up circuit
A converter is provided in which the cost and size of which are reduced by a decrease in current consumption with no need of large elements or radiation fins. The converter has a switching element...
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7221111 |
Switching power supply device and method of controlling the switching device
According to one embodiment, the switching power supply device comprises a DC-DC converter, an alternating current driver circuit, a smoothing capacitor and control circuitry. The control circuitry...
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7218536 |
Voltage regulator converter without switching losses
The invention concerns a converter which includes two input terminals and two output terminals, a main transformer presenting primary and secondary windings connected between the input terminals...
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7218081 |
Power system having multiple power converters with reduced switching loss
The present invention includes multiple power converters for driving one or more loads via an input power source, AC or DC. A first switching power converter has first one or more windings coupled...
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7161815 |
Constant current drooping switching power supply
A switching power supply for achieving a constant current drooping characteristic of sufficient accuracy with low cost and the minimum number of components. In the switching power supply, a...
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7161814 |
DC-DC converter with inductance element for detecting output current with accuracy
A DC-DC converter is provided which comprises an inductance element 10 having a plurality of in-phase windings N B , N A wound around a common magnetic core and connected to a load 5 ; a normal...
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7154234 |
Low voltage regulator for in-line powered low voltage power supply
The invented voltage regulator is a solid state low voltage regulator for in-line power lines for LED arrays and incandescent lamps, preferably low-voltage halogen lamps. The invented voltage...
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7148671 |
Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply
A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal...
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7116564 |
Switching power supply unit and semiconductor device for switching power supply
Overload protecting operation is performed by controlling the current peak value of a switching device 1 through the use of a comparator 8 , a NAND circuit 5 , and so on according to variations...
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7113411 |
Switching power supply
A switching power supply apparatus includes first and second switch circuits (S 1 ) and (S 2 ) including switch devices (Q 1 ) and (Q 2 ), diodes (D 1 ) and (D 2 ), and capacitors (Cds 1 ) and (Cds...
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7102900 |
Electronic circuit control element with tap element
A technique for controlling a power supply with power supply control element with a tap element. In one embodiment, a power supply regulator includes a power transistor having first, second, third...
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7099164 |
Adaptive multi-level threshold system and method for power converter protection
System and method for protecting a power converter. The system includes a compensation system configured to receive an input signal and generate a control signal, a cycle threshold generator...
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7095631 |
Switching power converter
A switching power converter for converting an AC power into a DC power. The converter includes a transformer, a charge storage unit, a synchronization signal generator, and a switch element. The...
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7081708 |
Lighting circuit
A lighting circuit for lighting a vehicular lamp including a plurality of light-emitting diodes, includes: a selection unit for selecting the number of light-emitting diodes to be connected in...
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7071632 |
Discharge lamp starter
A discharge lamp starter includes a DC/DC converter. The DC/DC converter includes a forward section for producing a first output voltage that is determined by a power supply voltage and a turn...
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7064968 |
Control for a switching power supply having automatic burst mode operation
Provided is a control module circuit for use with a switching power supply (SPS). The control module circuit has normal and standby operation modes controls switch-on/off operations of a switching...
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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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7027313 |
Constant voltage output control method and constant voltage output control device for switching power supply circuit
The present invention provides a constant voltage output control method and a constant voltage output control device for a switching power supply circuit that allow accurate execution of a constant...
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7012821 |
Flyback converter with synchronous rectifier
Disclosed herein is a flyback converter with a synchronous rectifier which is applied to a power supply of a portable computer such as a notebook PC. The flyback converter is operated in a critical...
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6999325 |
Current/voltage converter arrangement
A current/voltage converter arrangement is proposed, in which a first switch device (T 1 ) with a first diode (TD 1 ) is provided between a first input terminal (TE 1 ) of a primary side (TP) of a...
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6987676 |
Power converter with power factor adjusting means
A power converter for operating with an alternate current power source, including a storage capacitive means and a transformer, said storage capacitive means being adapted for power factor...
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6982883 |
Radiation tolerant electrical component with non-radiation hardened FET
A radiation tolerant electrical component is provided without a radiation hardened material FET. A p-channel MOSFET provides switching capabilities in radiated environments because its gate voltage...
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6980443 |
Switching type AC adapter circuit with a latch protection circuit
Disposed in a secondary side circuit and is connected to a constant voltage control circuit ( 22 ), to an overcurrent detection circuit ( 24 ), and to an overvoltage detection circuit ( 26 ), a...
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6977823 |
Switch power supply apparatus
The present invention provides a power supply apparatus with a plurality of digital control units. Each digital control unit is used to control an independent output terminal for outputting a...
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6972969 |
System and method for controlling current limit with primary side sensing
A primary side sensing power control system and method that controls the current limit such that it is maintained within a small range for any acceptable input voltages and causes the output...
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6972531 |
Method for operating at least one low-pressure discharge lamp
A method for operating at least one low-pressure discharge lamp having heatable lamp electrodes, in which, during the preheating phase of the lamp electrodes, the type of lamp is identified. In...
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6967472 |
Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply
A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal...
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