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| Number | Title | Issue Date |
| 8068354 | Current-level controlling device for a power supply device and related power supply device A current-level controlling device for a power supply includes a reception end for receiving a current sense signal, a reference voltage generator for generating a reference voltage, an adaptive reference voltage generator, coupled to the reference voltage generator... | 11/29/2011 |
| 8064230 | System and method for power conversion A system and method for operating power supplies. A method comprises altering a current sense (CS) signal, turning off a switch of the converter in response to a determining that the CS signal is greater than or equal to a first threshold, and leaving on the switch ... | 11/22/2011 |
| 7733672 | Programmable conduction mode control for switching circuits A control system that controls a switching circuit having a switching element and an inductive element coupled to an output of the switching element. The control system includes a switching control circuit that controls the switching element to operate the switching... | 06/08/2010 |
| 7636246 | Start-up time reduction in switching regulators A start-up time accelerator is described for a switch controller that controls turning on or off a switch in a switching regulator. The start-up time accelerator uses the switch as a current amplifier and provides the amplified current to a capacitor using a current... | 12/22/2009 |
| 7570498 | Switching power supply apparatus for correcting overcurrent detection point based on gradient of switching current A switching power supply apparatus has a switching device control circuit for performing overcurrent protection by controlling switching-on/off of a switching device, connected serially to a primary winding of a transformer, so as to make a voltage output from a rec... | 08/04/2009 |
| 7548437 | Switching mode power supply A switching mode power supply (SMPS) is presented to compensate for variations of maximum output power caused by variations of input power. The output power varies according to variations of input power because of a propagation delay of the SMPS. To compensate for t... | 06/16/2009 |
| 7440295 | Switching mode power supply with active load detection function, and switching method thereof A switching mode power supply (SMPS) with an active load detection function which supplies AC power input to a primary coil of a transforming element, then to a secondary coil of the transforming element, and then rectifies and outputs the AC power is provided. The ... | 10/21/2008 |
| 7394668 | Switching power supply circuit and frequency converter An object of the present invention is to lower the voltage applied to the starting resistor of the starting circuit in a switching power supply circuit to reduce the power loss especially when the receiving voltage is high and thereby provide a small and inexpensive... | 07/01/2008 |
| 7385831 | Power supply device and vehicle lamp A power supply device includes: a regulator transformer; a primary switch for selectively supplying a current to the regulator transformer; a control circuit for reducing to 0, following each election made at the primary switch, the minimum value of a current output... | 06/10/2008 |
| 7382062 | Wide voltage range stabilized switching power supply for valve actuators The invention finds application in the field of power supplies for valve actuators, and particularly relates to a wide voltage range stabilized switching power supply for valve actuators, of the type that comprises a filter 2, a diode bridge 3, an arra... | 06/03/2008 |
| 7373114 | Signal transmission circuit, signal output circuit and termination method of signal transmission circuit This invention provides a signal transmission circuit, a signal output circuit, and a termination method of a signal transmission circuit capable of preventing the re-reflection of the signal at a transmitting node of a transmission path even when an impedance of a ... | 05/13/2008 |
| 7345431 | Circuit structure for driving a plurality of cold cathode flourescent lamps A DC/AC converter circuit structure for driving a plurality of cold cathode fluorescent lamps is described. A common-mode choke is used between the cold cathode fluorescent lamps. The common-mode choke balances the currents respectively flowing through the cold cath... | 03/18/2008 |
| 7339802 | DC-AC converter and controller IC therefor An inventive inverter has a semiconductor switch circuit connected to the primary winding of a transformer. The semiconductor switch circuit is respectively controlled by PWM to supply a constant current to the load connected to a secondary winding of the transforme... | 03/04/2008 |
| 7327586 | Power supply unit and lighting device for vehicle A power supply unit comprises: a voltage output section for supplying a voltage to a plurality of loads connected in parallel with each other; and a plurality of output side coils provided respectively corresponding to the plurality of loads, the plurality of output... | 02/05/2008 |
| 7323832 | Inverter with dimming function A control circuit for an inverter for driving a fluorescent lamp includes a first triangular wave signal generator for use in analog dimming control, and a second triangular wave signal generator for use in burst dimming. The first triangular wave signal generator o... | 01/29/2008 |
| 7312589 | Driver control circuit and method for cold cathode fluorescent lamp A driver control circuit and method for a cold cathode fluorescent lamp (CCFL), that the driver control circuit comprises: at least a comparator; at least an input/output port, at least an analog-to-digital converter; at least two programmable pulse generators (PPGs... | 12/25/2007 |
| 7304867 | DC-DC converter of multi-output type A DC-DC converter of multi-output type is provided wherein a primary winding 5a is wound around core halves 5g, 5h of a transformer 5 between first and second secondary windings 5b, 5c of t... | 12/04/2007 |
| 7304870 | Power converter A power converter comprises an inductor (L) and a main switch (M1) having a main current path, the inductor (L) and the main current path are arranged in series to receive a DC-input voltage (VIN). A control circuit (CC) controls on-periods (Ton) and/or off-p... | 12/04/2007 |
| 7298632 | Secondary current compensation method Techniques for correcting for internal resistance losses in the secondary windings of a transformer to reduce errors in output voltage from a high voltage power supply. ... | 11/20/2007 |
| 7286330 | Power supply device and method having a spark prevention function Disclosed is power supply device and method having a spark prevention function. The power supply device having a spark prevention function includes output connectors to which an external device is coupled to be supplied with electric power; and an output controller ... | 10/23/2007 |
| 7274574 | Magnetically controlled transformer apparatus for controlling power delivered to a load with current transformer feedback A circuit with a magnetically variable transformer having primary and secondary windings wound on a magnetic core wherein the transformer core with associated windings is placed in close proximity to an independently wound control coil. The transformer core is place... | 09/25/2007 |
| 7262558 | Lamp current control device A lamp current control device includes an electronic power switch, a transformer, a current transformer and a pulse width modulation (PWM) IC. The transformer has its primary side connected to the electronic power switch and a secondary side connected to a lamp. The... | 08/28/2007 |
| 7262562 | Method for driving a fluorescent lamp and an inverter circuit for performing such a method A method for driving a fluorescent lamp and an inverter circuit for performing the same are used to reduce an amount of electromagnetic interference (EMI) generated by a transformer and an instantaneous loading of a DC voltage source. The inverter circuit comprises ... | 08/28/2007 |
| 7259525 | High efficiency switching LED driver The present invention provides a LED driver for control the brightness of the LED. An inductor and a switch are connected in serial with the LED for control the current of the LED. A control circuit is developed to generate a control signal for switching the switch ... | 08/21/2007 |
| 7248486 | Energy efficient switching converter A switching converter in which an input voltage can be switched by means of at least one controlled switch to at least one primary winding of a transformer, with a control circuit for controlling the switch, to which control circuit a regulating signal in the sense ... | 07/24/2007 |
| 7239533 | DC power supply apparatus A DC power source device comprises a MOS-FET 5 which performs the intermittent switching operation for converting DC input from a DC power supply 1 into high frequency electric power; a control circuit 9 for turning MOS-FET 5 on and off; ... | 07/03/2007 |
| 7235957 | Power supply with current-sharing control and current-sharing method thereof The present invention provides a power-supply apparatus with a current-sharing circuit and a current-sharing method thereof. The power supply with a current-sharing function uses a bus terminal as a current-sharing control interface. A power circuit provides an outp... | 06/26/2007 |
| 7236377 | DC-AC converter and controller IC therefor An inventive inverter has a semiconductor switch circuit connected to the primary winding of a transformer. The semiconductor switch circuit is respectively controlled by PWM to supply a constant current to the load. connected to a secondary winding of the transform... | 06/26/2007 |
| 7233117 | Inverter controller with feed-forward compensation The present invention is an inverter controller with feed-forward compensation. The inverter controller includes an error amplifier, a high frequency oscillator (HFOSC) with feed-forward compensation, a comparator, and a driver. The error amplifier can output a sign... | 06/19/2007 |
| 7233509 | Parallel operating system of DC-AC converters and controller IC therefor A multiplicity of synchronized inverters for driving a multiplicity of loads such as CCFLs that require high ac voltages are arranged in close proximity of the respective loads and controlled in phase. A frequency determination capacitor and a frequency determinatio... | 06/19/2007 |
| 7218532 | Switching mode power supply In one embodiment, a switching mode power supply (SMPS) include: a power supply for supplying power to a secondary coil of a transformer according to an operation of a main switch, the main switch being coupled to a primary coil of the transformer; a feedback circui... | 05/15/2007 |
| 7218060 | Flyback ballast for fluorescent lamp A flyback ballast for fluorescent lamps is provided. A transformer is utilized to control the power delivered to the lamp. A first switch is coupled to the first winding of the transformer. A first filter is coupled to a second filter through a first terminal pair o... | 05/15/2007 |
| 7190123 | Circuit structure for driving a plurality of cold cathode fluorescent lamps A DC/AC converter circuit structure for driving a plurality of cold cathode fluorescent lamps is described. A common-mode choke is used between the cold cathode fluorescent lamps. The common-mode choke balances the currents respectively flowing through the cold cath... | 03/13/2007 |
| 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 circuitry connected to the secondary of the transformer for transfer of t... | 02/27/2007 |
| 7170194 | Configurable multiple power source system A system for supplying additional power to a module having an internal power supply, the system comprising: a module having an associated power supply, the power supply not being designed to accommodate power sharing; at least one load associated with the module, th... | 01/30/2007 |
| 7157890 | Using pulse width modulation in the control of load sharing between paralleled power supplies A plurality of power supply modules having their outputs coupled in parallel are controlled for load balancing purposes through a direct current bus having filtered pulse width modulation (PWM) signals representative of the power outputs of each of the plurality of ... | 01/02/2007 |
| 7141940 | Method and control circuitry for providing average current mode control in a power converter and an active power filter Control circuitry uses modified average current mode control to regulate average current through an inductor of a power converter. Control circuitry uses modified average current mode control to regulate average current through an inductor of an active power filter.... | 11/28/2006 |
| 7136292 | Power supply and method for regulating supply voltage In a preferred embodiment, there is provided a switched mode power supply operable in start-up mode, normal mode and standby mode. The power supply may comprise a transformer having a primary winding on a primary side and a secondary winding on a secondary side, the... | 11/14/2006 |
| 7132764 | Innovative regulation characteristics in multiple supply voltages An apparatus and method for regulating multiple input voltages for a microelectronics device. The apparatus includes a controller configured to maintain each of the multiple input voltages supplied to one or more microelectronics devices within a range. The controll... | 11/07/2006 |
| 7120808 | Information processing apparatus and method, as well as program Performing power saving control which can be inherited and standardized easily, and which keeps power devices from having to become larger is made possible. A current In flowing through an electrical path is detected as a voltage Vs by a current detection section, a... | 10/10/2006 |
