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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8125797 | 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 starts at a negative value and becomes more negative with exposure t... | 02/28/2012 |
| 8102676 | Compensating for cord resistance to maintain constant voltage at the end of a power converter cord A cord correction circuit in a primary-side-controlled flyback converter compensates for the loss of output voltage caused by the resistance of the charger cord. In one embodiment, a correction voltage is subtracted from a feedback voltage received from a primary-si... | 01/24/2012 |
| 8098501 | Switching power supply control circuit A comparator detects whether a feedback signal of an output voltage detecting circuit for a switching power supply circuit reaches a control voltage. A comparator detects an operating state of the switching power supply circuit, which is instructed by a switching in... | 01/17/2012 |
| 8077483 | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller An example controller for a power converter according to aspects of the present invention includes a switching control that switches a power switch to regulate an output of a power converter. The controller also includes a sensor coupled to receive a signal from a s... | 12/13/2011 |
| 8077484 | Apparatus and method for detecting a change in output voltage of an isolated power converter A controller for use in a power converter to detect changes in output voltage. An example controller includes a drive circuit to generate a switching signal. The switching signal is coupled to be received by a power switch to be coupled to an energy transfer element... | 12/13/2011 |
| 8054652 | Systems and methods for off-time control in a voltage converter Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer with a first winding and a second winding. A voltage is applied to the first winding for ... | 11/08/2011 |
| 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 voltage; generating a reference signal according to at least one of a ... | 09/13/2011 |
| 8018741 | Adjusting for conductor loss to regulate constant output voltage in a primary feedback converter A lower-cost and more precise control methodology of regulating the output voltage of a flyback converter from the primary side is provided, which works accurately in either continuous voltage mode (CCM) and discontinuous mode (DCM), and can be applied to most small... | 09/13/2011 |
| 8004861 | Parameter configuration method for elements of power factor correction function converter The present invention discloses a parameter configuration method for elements of a PFC function converter. The converter has a PFC circuit modulating an input power into a DC modulated power and a transformer transforming the DC modulated power into an output power.... | 08/23/2011 |
| 8000112 | Active snubber for transition mode power converter A transition mode power converter having an active snubber the operation of which is controlled using an auxiliary winding on the transformer of the power converter. In one embodiment, the power converter includes a transformer having a primary winding connected to ... | 08/16/2011 |
| 7974107 | System and method for controlling a current limit with primary side sensing using a hybrid PWM and PFM control A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereaf... | 07/05/2011 |
| 7969753 | Maintaining a constant output voltage by sampling and holding a voltage across an auxiliary winding A lower-cost and more precise control methodology of regulating the output voltage of a flyback converter from the primary side is provided, which works accurately in either continuous voltage mode (CCM) and discontinuous mode (DCM), and can be applied to most small... | 06/28/2011 |
| 7952893 | Integrated control circuit for controlling a switching power supply, switching power supply incorporating the same, and a method of controlling a switching power supply An integrated control circuit for controlling a switching power supply, a switching power supply incorporating the same, and a method of controlling the switching power supply, where the control IC includes a current comparator that detects current flowing through a... | 05/31/2011 |
| 7940533 | Step-down voltage converter A step-down voltage converter (100) for generating an output voltage (VOUT) from an input voltage (VIN) is provided. The converter (100) includes a switch (111) having a first terminal (112) and a second terminal (114), wherein the... | 05/10/2011 |
| 7916505 | Method and apparatus for a leakage energy recovery circuit A method and apparatus for recovering leakage energy during DC power to AC power conversion. The apparatus comprises a leakage energy recovery circuit for storing leakage energy from a transformer and selectively coupling stored leakage energy to an input of the tra... | 03/29/2011 |
| 7911811 | Switching power supply with increased efficiency at light load A switching power supply with the increased efficiency at light load has a switching power circuit, a power monitoring circuit and a light load power supplying circuit. The switching power circuit converts an AC power to a stable DC power and sends the DC power to a... | 03/22/2011 |
| 7885084 | Control circuit for synchronous rectifying and soft switching of power converters A control circuit for soft switching and synchronous rectifying is provided for power converter. A switching-signal circuit is used for generating drive signals and a pulse signal in response to a leading edge and a trailing edge of a switching signal. The switching... | 02/08/2011 |
| 7869229 | Compensating for cord resistance to maintain constant voltage at the end of a power converter cord A cord correction circuit in a primary-side-controlled flyback converter compensates for the loss of output voltage caused by the resistance of the charger cord. In one embodiment, a correction voltage is subtracted from a feedback voltage received from a primary-si... | 01/11/2011 |
| 7869228 | Power delivery systems and methods with dynamic look-up table According to some embodiments, information about a power delivery stage is determined for a plurality of operating condition values. The determined information may then be stored in a dynamic look-up table of an adaptive tracking controller engine according to some ... | 01/11/2011 |
| 7835162 | Power converter for compensating a maximum output power A power converter and a PWM controller for compensating a maximum output power includes a power switch, an oscillator, a control circuit and a delay modulator. The oscillator generates a pulse signal. The control circuit is coupled to the oscillator for generating a... | 11/16/2010 |
| 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, the first power supply circuit (11) is con... | 11/09/2010 |
| 7821798 | High voltage power supply Provided is a high voltage power supply which includes a controller to provide a PWM signal and a power signal, an input unit to receive the PWM signal provided from the controller, a comparison unit to control output of the power signal supplied from the controller... | 10/26/2010 |
| 7791907 | Apparatus for generating high-voltage and method thereof Provided are a high voltage generating apparatus controlled by a digital control code and a method thereof. The high voltage generating apparatus includes a switching unit for controlling a voltage induced at the secondary coil of a power transformer by an interrupt... | 09/07/2010 |
| 7729135 | Power converter using a single tapped transformer for multiple ranges of input voltage In one embodiment, a power converter system includes an input terminal for an input voltage. A transformer, coupled to the input terminal, has a primary winding and a secondary winding. An output terminal is coupled to the secondary winding. Power is delivered to a ... | 06/01/2010 |
| 7724546 | Converter A converter capable of suppressing an instant voltage variation and outputting a desired DC power with high precision. The converter includes a power conversion unit that conducts power conversion on a supplied power, a smoothing filter that smoothes the power that ... | 05/25/2010 |
| 7724545 | Switching converter having an activatable and deactivatable damping circuit A switching converter for power factor correction which has-input terminals, an inductive storage element coupled to the input terminals, a rectifier arrangement, a control arrangement, and a damping circuit. The rectifier arrangement is connected to the inductive s... | 05/25/2010 |
| 7710745 | Bipolar power supply system The present invention is directed to a remotely controlled power supply system that can change output polarity at a high slew rate without using switching devices. The system comprises a control circuit and two individual high voltage DC-DC converter power supply se... | 05/04/2010 |
| 7697307 | Power supply circuit for outputting steady voltage An exemplary power supply circuit includes a transformer (21) having a primary coil (211) and a secondary coil (212); a rectification circuit and a transistor (26) respectively coupled to two terminals of the primary coil; a communicating... | 04/13/2010 |
| 7684215 | Switching mode power supply and driving method thereof The present invention relates to a Switching Mode Power Supply (SMPS) and a driving method thereof. To this end, the present invention provides a SMPS, which is driven in either a Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM) in accordance ... | 03/23/2010 |
| 7675759 | Power system with power converters having an adaptive controller A power system having a power converter with an adaptive controller. The power system is coupled to a load and includes a power system controller that receives a signal indicating a system operational state of the load and selects a power converter operational state... | 03/09/2010 |
| 7675758 | Power converter with an adaptive controller and method of operating the same A controller for a power converter, and method of operating the same. The controller improves power converter operating efficiency by regulating an internal power converter operating characteristic depending on a value of a power converter parameter measured after a... | 03/09/2010 |
| 7672146 | Switching mode power supply and driving method A switching mode power supply includes a switching transistor, coupled to a primary coil at a primary side of a transformer for converting an input DC voltage, supplying power to a secondary and a tertiary coil at a secondary side of the transformer according to an ... | 03/02/2010 |
| 7656685 | Control method and circuit with indirect input voltage detection by switching current slope detection The present invention provides a method and circuit for detecting an input voltage of a power converter. It includes a current sense circuit for generating a current signal in response to a switching current of an inductive device. A detection circuit is coupled to ... | 02/02/2010 |
| 7630215 | Power apparatus and method to provide high voltage A power apparatus and method thereof include first and second signal processing units. The first signal processing unit filters and adjusts a first inputted PWM signal in a predetermined bandwidth to set a reference potential. The second signal processing unit compa... | 12/08/2009 |
| 7619904 | Pulse signal drive circuit A pulse signal drive circuit includes an energy storage device. A source of energy supplies a substantially constant flow of energy to the energy storage device. A switch circuit draws repetitive pulses of substantially constant energy from the energy storage device... | 11/17/2009 |
| 7586761 | Converter having a plurality of channels A converter having a plurality of channels includes a transformer having a primary winding and at least one secondary winding. A first switch connected to the primary winding chops a substantially DC voltage in compliance with a first squarewave periodic signal to f... | 09/08/2009 |
| 7567444 | Multi-output DC-DC converter with improved cross-regulation performance A multi-output DC-DC converter that can optimize its cross-regulation performance is proposed, in which a nonlinear inductive element functioning as a leakage inductance of an output coupled inductor is placed on the output channel of at least one secondary circuit ... | 07/28/2009 |
| 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 signals VOSC from an oscillator 10 | 06/02/2009 |
| 7535734 | High power-factor AC/DC converter with parallel power processing The present invention is an AC/DC (alternating current to direct current) converter. The converter contains two semi-stages. One is the boost-flyback semi-stage that has excellent self-PFC property when operating in DCM even though the boost output is close to the p... | 05/19/2009 |
| 7515441 | Switching power supply A switching power supply, in which a switching element turns on and off electric current flowing on the primary side of an output transformer so as to rectify and output a pulsating flow generated on the secondary side of the output transformer, includes a voltage d... | 04/07/2009 |
