Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8174852 | Asymmetric switch forward converter A switching circuit for use in a power converter in one aspect includes a first and second active switch and a first and second passive switch. The first active switch can be coupled to a first terminal of a primary winding of a transformer. The second active switch... | 05/08/2012 |
| 8169799 | Power factor correction circuit A power factor correction circuit steps up and power-factor-corrects a rectified voltage, which has been rectified from an AC input voltage of an AC power source Vin, through an ON/OFF operation of a switching element Q1 and supplies a stepped-up output volta... | 05/01/2012 |
| 8164926 | Control circuit for a switched-mode power supply with regulation based on the secondary-side current flow time period A control circuit for a primary controlled switched-mode power supply that has a primary-side switch and a transmitter. It also relates to an associated switched-mode power supply. The control circuit can be connected to a control input of the primary-side switch so... | 04/24/2012 |
| 8154889 | Operating mode detection in a flyback converter Particular embodiments generally relate to detecting an operating mode of a flyback converter. In one embodiment, a voltage of a flyback converter is measured. A waveform for the voltage includes a first rate of change when the flyback converter is in a first mode o... | 04/10/2012 |
| 8149601 | Adaptive slope compensation method for stabilizing a continuous conduction mode converter An embodiment of the invention relates to a power converter operable in a continuous conduction mode and a discontinuous conduction mode that includes a current-sense circuit element configured to produce a current-sense signal dependent on a current in an inductor ... | 04/03/2012 |
| 8144485 | Direct current voltage conversion circuit A DC voltage conversion circuit (20) of the present disclosure includes a power supply (21), a first output (27), a second output (26), a transformer (22), a first voltage-regulating circuit (25), a second voltage regulating... | 03/27/2012 |
| 8144487 | Apparatus and method for sensing of isolated output A controller for use in a power converter providing sensing of an isolated output is disclosed. An example controller includes a current controller to be coupled to an energy transfer element and an input of the power converter. A control circuit is included that ge... | 03/27/2012 |
| 8144486 | Power converter and driving method thereof In a power converter, a primary coil receives an input voltage, and a switch includes a first electrode, a second electrode coupled to the primary coil, and a control electrode. An output unit includes a secondary coil, and outputs an output voltage. The primary coi... | 03/27/2012 |
| 8125798 | Constant current and voltage controller in a three-pin package operating in critical conduction mode A self-oscillating flyback converter includes a controller integrated circuit housed in a 3-pin package. A switch control terminal is coupled to the base of an inductor switch that controls the current through a primary inductor of the converter. The controller IC a... | 02/28/2012 |
| 8102679 | Utilization of a multifunctional pin to control a switched-mode power converter An embodiment of the invention relates to a power converter including a resistor divider with an internal node to sense an input line voltage. The internal node is operable as a multifunctional pin. A controller compares a feedback voltage dependent on a power conve... | 01/24/2012 |
| 8089781 | Method and apparatus to limit maximum switch current in a switching power supply An example integrated circuit for use in a power supply includes a switch, a terminal and a controller. The controller is coupled to control switching of the switch to regulate the output of the power supply in response to a feedback signal received at the terminal.... | 01/03/2012 |
| 8081495 | Over power compensation in switched mode power supplies An over-power compensation circuit for use in a switched mode power supply having a current sense circuit for sensing a current flowing through a power transistor of the switched mode power supply. The over-power compensation circuit includes a peak detector, a samp... | 12/20/2011 |
| 8077486 | Method and apparatus for power converter fault condition detection An example controller includes a fault detector and a control. The fault detector is to be coupled to a feedback circuit of a power converter to detect a fault condition in the power converter in response to an input voltage of the power converter. The control is co... | 12/13/2011 |
| 8036002 | Wide supply range flyback converter A wide supply range flyback converter consists of a Schmitt trigger driving a switching device such as MOSFET. The circuit employs a feed forward voltage controlled current source and two other voltage controlled current sources, one of which is responsible for mini... | 10/11/2011 |
| 8031490 | Power supply circuit and power supply system To provide a power supply circuit which can be applied worldwide without using a high withstand voltage switching element and can supply a load device with stable power. A charging section is arranged between a turn-off capacitor and a load coil. The charging sectio... | 10/04/2011 |
| 8009445 | Switching power source apparatus A switching power source apparatus includes a switching element connected through a primary winding of a transformer to a voltage terminal of a DC input voltage, a rectifying-smoothing circuit to rectify and smooth a voltage induced by a secondary winding of the tra... | 08/30/2011 |
| 8004864 | Method and apparatus for a control circuit responsive to an impedance coupled to a control circuit terminal An example power supply includes a controller and a detection circuit. The controller includes a sense terminal coupled to provide a sense terminal current representative of an input voltage of the power supply during normal operation. The detection circuit is exter... | 08/23/2011 |
| 7995360 | Power system with shared clamp reset A power supply includes a first power converter, a second power converter, and a clamp reset circuit. The clamp reset circuit is electrically coupled to other components within the first power converter and the second power converter. A clamp standby connection can ... | 08/09/2011 |
| 7995359 | Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter A control circuit for use in a power converter with an unregulated dormant mode of operation includes a drive signal generator coupled to generate a drive signal to control switching of a power switch in response to an energy requirement of one or more loads to be c... | 08/09/2011 |
| 7995358 | Control circuit including adaptive bias for transformer voltage detection of a power converter A control circuit is developed to detect a flyback voltage of a transformer of a power converter. The control circuit comprises a switch, a detection circuit and a switching circuit. The switch is coupled to the transformer for switching the transformer. The detecti... | 08/09/2011 |
| 7995361 | Circuit for output voltage error detect and feedback in SMPS The present invention relates to an error information detection circuit and an error feedback circuit, which detect the error of an output voltage from a voltage induced to a winding. The circuit for detecting error information of an output voltage of a transformer ... | 08/09/2011 |
| 7986536 | Method of forming a power supply controller and structure therefor In one embodiment, a switching controller uses an auxiliary winding voltage of a transformer to form a signal representative of current flow through a secondary winding of the transformer. ... | 07/26/2011 |
| 7965523 | Switching power supply device In a switching power supply device, a first switch element, which defines a main switch element of a DC-DC converter, and a third switch element, which defines a switch element of a power-factor correcting circuit, are controlled such that turn-on timings are synchr... | 06/21/2011 |
| 7961483 | Constant current and voltage controller in a small package with dual-use pin A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls an inductor switch through which the inductor current flows. The inductor current inc... | 06/14/2011 |
| 7940535 | Discharge lamp lighting device for lighting discharge lamps A transformer 6 and a photocoupler 5 are provided to ensure insulation between a primary side circuit section 10 connected to an alternating current power supply 2, and a secondary side circuit section 20 for applying a voltage to ... | 05/10/2011 |
| 7933131 | Power supply and image forming device having the same A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an image forming device having the same are disclosed. The power supply incl... | 04/26/2011 |
| 7911814 | Constant current and voltage controller in a three-pin package with dual-use power pin A flyback converter includes a controller integrated circuit (IC) housed in an IC package with only three terminals. An inexpensive TO-92 transistor package can be used. A switch terminal is coupled to an inductor switch that is turned on by a switch control signal ... | 03/22/2011 |
| 7911815 | Primary-side feedback control device and related method for a power converter A primary-side feedback control device for a power converter includes a control unit for generating a pulse signal according to a feedback signal for controlling on and off states of a switching transistor of the power converter, a comparator coupled to an auxiliary... | 03/22/2011 |
| 7907426 | Flyback circuit providing synchronized control A flyback circuit providing synchronized control includes a pulse width modulation (PWM) unit, a synchronized control unit and an ON period limiting unit. The PWM unit generates a driving signal to control a switch ON period of a primary winding and provides a synch... | 03/15/2011 |
| 7898824 | Power supply circuit with feedback circuit An exemplary power supply circuit (200) includes a pulse width modulation circuit (220) providing a pulse signal, a voltage conversion circuit (210) converting a primary voltage to an output voltage according to the pulse signal, a feedback circ... | 03/01/2011 |
| 7898823 | Quasi-resonant fly-back converter without auxiliary winding Disclosed is a switching converter without an auxiliary winding. The switching converter has a transformer, a switching transistor, a coupling circuit and a regulating circuit. The transformer has a primary winding and a secondary winding, and is for transforming an... | 03/01/2011 |
| 7894215 | Electronic apparatus, AC/DC conversion device and power factor correction circuit thereof An electronic apparatus, AC/DC conversion device and power factor correction circuit are provided. The power factor correction circuit includes an inductance, a switch, a power control chip, a first diode and a first capacitor. The inductance has a first end and a s... | 02/22/2011 |
| 7881077 | PWM controller with output current limitation A PWM controller with output current limitation makes the over-current limitations almost the same even though the input voltages are different. The designer does not need to use high specification components or add an output current limiting circuit against the ove... | 02/01/2011 |
| 7872881 | Secondary regulation in a multiple output flyback topology In one embodiment, a power supply includes a flyback transformer having a primary winding and at least two secondary windings. An output voltage is developed across a first one of the secondary windings. The power supply includes a transistor coupled to the first on... | 01/18/2011 |
| 7859865 | Method and apparatus for conditional response to a fault condition in a switching power supply Techniques are disclosed to regulate an output of a power converter. One example power converter controller circuit includes a line sense input to be coupled to receive a signal representative of an input voltage of a power converter. A feedback input to be coupled ... | 12/28/2010 |
| 7859863 | Single-stage power factor correction circuit A single-stage power factor correction circuit includes a first rectifier, a second rectifier, a full bridge rectifier, a capacitor, a fly back transformer, and a switch. Unlike conventional single-stage power factor correction circuits, the present invention just n... | 12/28/2010 |
| 7859864 | Switching power supply device A switching power supply device has lower correction circuit losses, and enables adjustments without affecting overcurrent limiting or other characteristics. An integrated circuit IC for power supply control generates a switching signal based on a feedback signal fr... | 12/28/2010 |
| 7859862 | Apparatus and method for regulating constant output voltage and current on primary side in a flyback converter A voltage detector circuitry extracts a signal on primary side of a transformer in a flyback converter, which is proportional to the output voltage of the converter without voltage drop on the rectifier diode and leakage inductance effect on the transformer, and goo... | 12/28/2010 |
| 7852640 | System and method for providing control for switch-mode power supply System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first volta... | 12/14/2010 |
| 7848119 | Direct current to direct current converter An exemplary DC to DC converter (2) includes a transistor (29), a first rectifying and filtering circuit (21), a pulse generating circuit (27) and a transformer (25). The first rectifying and filtering circuit transforms an externa... | 12/07/2010 |
