| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 363210080 | Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.) | 8 |
| 20080278973 | Apparatus and method for providing multiple functions and protections for a power converter - A power converter has a transformer including a primary winding connected between a power input and a power switch, the power switch is switched to deliver power from the power input to a power output, an auxiliary winding provides an induced voltage in such a manner that when the power switch is at a first switch state, the induced voltage reflects an input information of the power converter, and when the power switch is at a second switch state, the induced voltage reflects an output information of the power converter. Two detection signals are generated from the input and output information, respectively, to implement multiple functions and protections. | 11-13-2008 |
| 20090059624 | DC to DC converter - An exemplary direction 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 transformer configured to receive the first DC voltage and transform the first DC voltage to a second AC voltage under control of the PWM circuit, and a second rectifying and filtering circuit including a first transistor and a control circuit for switching on or switching off the first transistor so as to transform the second AC voltage to a second DC voltage. | 03-05-2009 |
| 20090284993 | Switching power supply circuit - A switching power supply circuit includes a direct current (DC) power supply input; a voltage divider connected between the DC power supply input and ground; a transformer including a primary winding, a secondary winding, and an assistant winding; a pulse generating circuit including a first transistor, a second transistor, an oscillation capacitor, and an oscillation resistor; an output; and a feedback circuit adjusting a duty ratio of a pulse signal in the assistant winding. The DC power supply input is grounded via the primary winding, two conducting electrodes of the second transistor. A control electrode of the second transistor is connected to an output of the voltage divider. An output of the voltage divider is connected to a control electrode of the second transistor and is grounded via two conducting electrodes. A control electrode of the first transistor is grounded via the assistant winding and grounded via the oscillation capacitor and the oscillation resistor connected in series. | 11-19-2009 |
| 20100118565 | METHOD OF FORMING A SERIES RESONANT SWITCHING POWER SUPPLY CONTROL CIRCUIT AND STRUCTURE THEREFOR - In one embodiment, a control circuit for a series resonant switching power supply control system is configured to disable a power switch of secondary side of the system in response to a polarity reversal of the voltage across a primary side winding of the system. | 05-13-2010 |
| 20140133191 | POWER CONVERTER AND CONTROL METHOD THEREOF - A power converter is provided. A transformer includes a primary winding for providing a primary voltage according to an input voltage, a secondary winding for providing a secondary voltage according to the primary voltage and an auxiliary winding for providing a reflection voltage according to the secondary voltage. A first switch coupled between the primary winding of the transformer and a ground has a control terminal for receiving a first control signal. A second switch coupled to the secondary winding has a control terminal for receiving a second control signal. A controller provides the first control signal to switch the first switch, so as to control the transformer to provide the secondary voltage. The controller provides the second control signal to switch the second switch according to the first control signal and the reflection voltage, so as to provide an output voltage in response to the secondary voltage. | 05-15-2014 |
| 20140268911 | POWER MANAGEMENT INTEGRATED CIRCUIT PARTITIONING WITH DEDICATED PRIMARY SIDE CONTROL WINDING - A switched mode power converter having a feedback mechanism by which a coded train of pulses with well defined integrity is generated on a secondary side of the power converter and transmitted to a dedicated control signal winding on the primary side for decoding and application to regulate the power converter output. The control signal winding enables separation of control signal transmission and power transmission resulting in improved processing of the control signal by a primary side controller. The pulse train is modulated by a secondary side controller, transmitted across a transformer and received by the control signal winding, and supplied to the primary side controller. Coded information is included in the coded pulse train by modulating pulses of the pulse train. | 09-18-2014 |
| 20140328088 | POWER SUPPLY CIRCUIT - A power supply circuit includes a plurality of output terminals that output voltages (voltages may have the same or different voltage values among the output terminals), and a transformer that has a plurality of output windings. First and second output windings of the plurality of output windings are coupled to each other. The first and second output windings have the same number of turns. First terminals, which have a first polarity, of the first and second output windings are connected to each other via a capacitor. Further, second terminals, which have a second polarity opposite to the first polarity, of the first and second output windings are electrically connected to each other. The second terminals of the first and second output windings may be directly connected to each other. | 11-06-2014 |
| 20160043633 | High Voltage Power Converter with a Configurable Input - A high voltage power converter has first, second, and third switches for receiving an alternating-current input. A control power factor correction (PFC) rail is connected to each of the first, second, and third switches. A slave PFC rail is connected to each of the first, second, and third switches for providing a substantially identical output compared to an output of the control PFC rail. The control PFC rail output and the slave PFC rail output are each connected to an output stage and the output stage is for connection to a load. | 02-11-2016 |
