Quotables
"The man with a new idea is a crank until the idea succeeds."
Samuel Clemens
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8139380 | Flyback system power source apparatus for controlling a synchronously rectifying element A flyback system power source apparatus, which applies a voltage intermittently to a primary winding of a transformer to perform voltage outputting onto a secondary winding side of the transformer, comprises: the transformer; a synchronously rectifying element for r... | 03/20/2012 |
| 8134847 | Circuit arrangement and method for converting an alternating voltage into a rectified voltage A circuit for converting an alternating voltage into a rectified voltage includes a first transistor having a first terminal, a second terminal, and a control terminal. The first terminal is configured to receive the alternating voltage via an input terminal, and th... | 03/13/2012 |
| 8125799 | Control circuits and methods for switching mode power supplies Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfe... | 02/28/2012 |
| 8102680 | Smart driving method for synchronous rectifier and its apparatus thereof The present invention discloses a smart driving method for a secondary synchronous rectifier of an isolated converter and its apparatus thereof. The apparatus comprises: a main circuit having a secondary synchronous rectifier Q1; a differentiation filter circ... | 01/24/2012 |
| 8040698 | Flyback switching power apparatus with synchronous rectification and load detection Disclosed a switching power source apparatus including: a transformer including a primary winding and a secondary winding; a switching element to intermittently apply a voltage to the primary winding by an on-off operation; and a synchronous rectifying element to re... | 10/18/2011 |
| 8023291 | Voltage detecting circuit and switching power source apparatus A voltage detecting circuit to perform voltage detection by introducing a voltage from a detection node, comprises: a first resistance, a second resistance, and a first switching element, connected in series with each other from the detection node to reference elect... | 09/20/2011 |
| 8000115 | Flyback power supply with forced primary regulation A flyback converter controller with forced primary regulation is disclosed. An example flyback converter controller includes a secondary control circuit to be coupled to a switched element coupled to a second winding of a coupled inductor of a flyback converter. The... | 08/16/2011 |
| 7957163 | Current controlled synchronous rectifying drive circuit A current controlled synchronous rectifying drive circuit including a current transducer ST having a primary winding connected in series with a synchronous rectifier SR and having a secondary winding to detect a current signal of a synchronous rectifier SR, a signal... | 06/07/2011 |
| 7940536 | Flyback converter with improved synchronous rectification A flyback converter circuit in accordance with an embodiment of the present application includes a DC input operable to receive a DC voltage from a DC voltage source, a transformer including a primary coil and a secondary coil, a primary switch operable to selective... | 05/10/2011 |
| 7903436 | Smart blanking circuit for synchronous rectification in a switched mode power supply In a controller (CC2) for controlling a synchronous rectification switch (S2), the controller (CC2) comprises a sensing circuit (SRL) for sensing an output (D2) of the synchronous rectification switch (S2) at an end of a blanking t... | 03/08/2011 |
| 7894217 | DC to DC converter An exemplary direct current (DC) to DC converter includes a first rectifying and filtering circuit configured to receive an alternating current (AC) voltage and transform the AC voltage to a first DC voltage, a pulse width modulation (PWM) circuit, a first transform... | 02/22/2011 |
| 7889521 | Three-pin integrated synchronous rectifier and a flyback synchronous rectifying circuit A three-pin integrated synchronous rectifier is the synchronous rectifier chip where the quantity of connection pins is the smallest possible quantity. The three-pin integrated synchronous rectifier uses a control pin to receive a control signal used as a power bias... | 02/15/2011 |
| 7876583 | Flyback power supply with forced primary regulation A flyback converter with forced primary regulation is disclosed. An example flyback converter includes a coupled inductor including a first winding, a second winding, and a third winding. The first winding is coupled to an input voltage and the second winding is cou... | 01/25/2011 |
| 7876584 | Circuit and method for controlling the secondary FET of transformer coupled synchronous rectified flyback converter A secondary FETsc control circuit is disclosed for controlling FETsc of transformer coupled synchronous rectified flyback converter (TCSC). The control circuit includes source-drain voltage VSD sense trigger with output VSD | 01/25/2011 |
| 7869231 | System and method for synchronous rectifier drive that enables converters to operate in transition and discontinuous mode A synchronous rectifier is switched in accordance with a primary switch transition and a reference signal representing current in a current storage device to which the synchronous rectifier is coupled. A current emulator provides a signal representing current in the... | 01/11/2011 |
| 7852641 | Power supply apparatus having multiple outputs A power supply apparatus having multiple outputs, a transformer, a first output circuit generating a first output voltage with respect to power transferred to a secondary side of the transformer, and a first output controller generating a first control signal to con... | 12/14/2010 |
| 7791910 | Flyback converter with synchronous rectifier capable of reducing power loss Disclosed is a flyback converter with a synchronous rectifier, in which the synchronous rectifier includes a synchronous switch, a current transformer connected in series between a drain terminal of the synchronous switch and an output terminal, and a secondary sync... | 09/07/2010 |
| 7688602 | Synchronous rectifier control circuit and method Circuit and method for controlling a synchronous rectifier. A circuit for monitoring the drain to source voltage of an SR transistor in a secondary side circuit of a voltage converter is disclosed, having a circuit for generating a gate control circuit for the SR MO... | 03/30/2010 |
| 7675762 | Multi-voltage power supply A multi-voltage power supply includes a transformer, a first output circuit to generate a first output voltage using a voltage transferred to a secondary winding of the transformer, and a first output voltage controller to control a voltage supplied to the primary w... | 03/09/2010 |
| 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 circuit includes a control circuit coupled to the feedback signal to gene... | 09/16/2008 |
| 7405953 | Driving circuit for power switching device A driving circuit has a p-channel transistor and an n-channel transistor. A power switching element is set at an on state each time the p-channel transistor sets a charging line at a conductive state in response to a leading edge of an output pulse to supply a posit... | 07/29/2008 |
| 7400519 | Switching power supply A switching power supply comprises one or more switching sections which repeat ON/OFF operation, a transformer having a primary winding and a secondary winding, a synchronous rectifier section for rectifying a voltage induced in the secondary winding when an input v... | 07/15/2008 |
| 7385832 | Method of forming a secondary-side controller and structure therefor In one embodiment, a secondary-side controller is configured to detect a burst-mode of operation and responsively block or prevent sending drive pulses to a power transistor that is coupled in the secondary side. ... | 06/10/2008 |
| 7372710 | Switching power source device of the type capable of controlling power loss in generating output voltage from a secondary winding of a transformer A switching power source device is provided which comprises a secondary MOS-FET 9 connected between a secondary winding 6 of a transformer 2, a reactor 11 connected in parallel to secondary winding 6 of transformer 2 for acc... | 05/13/2008 |
| 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 switch (S) that periodically applies the input voltage to at least one p... | 04/29/2008 |
| 7365997 | Synchronous switching control circuit for power converters The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is cou... | 04/29/2008 |
| 7362601 | Power supply device A power supply device includes two input ports, two output ports, a transformer having primary and secondary windings, a switch device, and a controller. The switch device includes a switching element connected in series with the primary winding, and a capacitor. Th... | 04/22/2008 |
| 7345896 | Secondary side power supply controller and method therefor In one embodiment, a power supply controller generates a PWM control signal that is subsequently used to control a portion of current flow in a primary side of a power supply system. THE PWM control signal is coupled to a secondary of the power supply system and use... | 03/18/2008 |
| 7342365 | Systems and methods for reducing input current in photoflash chargers A circuit for charging a photoflash that preferably reduces the average input to the switching regulator in an efficient fashion is provided. The regulator includes a transformer. The transformer includes a primary winding and a secondary winding. The switchi... | 03/11/2008 |
| 7339800 | Switching power source device of resonance type capable of controlling switching loss and noise A switching power source device of resonance type is provided which comprises an output voltage detector 18 for detecting output voltage on a load 13 to produce a detection signal; and a control circuit 2 for applying on-off signals Vg1 | 03/04/2008 |
| 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 accordance with a second control signal; a current sensor that detects an o... | 02/26/2008 |
| 7324355 | Dc-DC converter A DC-DC converter is provided which includes a switching element, a choke coil, a flywheel diode, an output capacitor, a diode, and an auxiliary transformer having primary and secondary windings. The primary winding and the switching element constitute a first serie... | 01/29/2008 |
| 7319601 | Starting circuit for switching power supplies A bootstrap circuit for switching power supplies (SMPS), a switching power supply including a bootstrap circuit, and an integrated circuit of a switching power supply, are provided. The bootstrap circuit (13) for switching power supplies includes a first supp... | 01/15/2008 |
| 7310244 | Primary side controlled switching regulator A switching regulator includes a transformer having a primary winding and an auxiliary winding connected to the supply rail of the switching regulator. The primary winding is coupled to the positive supply rail. The auxiliary winding is coupled to the negative suppl... | 12/18/2007 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7285989 | Device for detection of power-off A power-off detection device is formed without use of a photo coupler, which is expensive and occupies a relatively large area. The power-off detection device rectifies AC power, provided as external input power from a power supply device, into DC power, detects the... | 10/23/2007 |
| 7274116 | direct-current power supply and battery-powered electronic apparatus equipped with the power supply A bypass control section (6) maintains a bypass switch (5) in the ON state during the period when a battery voltage (Vi) is higher than the output voltage (Vo) to an external load (L). Upon falling of the output voltage (Vo) at a desired voltage (ET), ... | 09/25/2007 |
| 7272024 | Synchronized rectification circuit and switching power supply device A synchronized rectification circuit and a switching power supply device having little power loss with respect to a wide range of input voltages and having a high efficiency, comprising first and second switch elements, first and second capacitors connected with eac... | 09/18/2007 |
| 7271544 | Lighting apparatus for illumination light source In a lighting apparatus for an illumination light source (discharge lamp or the like), a fly-back type DC-DC converter circuit comprises a transformer and a switching element. A control circuit is provided for controlling power supplied to the illumination light sou... | 09/18/2007 |
| 7269210 | Electrical isolation techniques for DSL modem One embodiment of the present invention provides a DSL modem for coupling a transmission line to a communication system interface, the modem having digital isolation and power isolation. Another embodiment of the present invention provides a method for communicating... | 09/11/2007 |
