| Patent application number | Description | Published |
|---|
| 20090256545 | 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 and the reception end, for adjusting the reference voltage according to variation of peak values of the current sense signal, so as to generate an adaptive reference voltage, a comparator, coupled to the reception end and the adaptive reference voltage generator, for comparing the current sense signal and the adaptive reference voltage, to generate a comparison result, and a control unit, coupled to the comparator, for controlling a switch transistor of the power supply according to the comparison result. | 10-15-2009 |
| 20100007409 | Method and Related Device for an Adjustable Leading Edge Blanking Device in a Power Supply Device - A method for an adjustable leading edge blanking device in a power supply device includes generating a detection signal according to a leading edge and a trailing edge of a spike signal, generating a blanking signal according to the detection signal, for blanking the spike signal between the leading edge and the trailing edge, and controlling output states of the power supply device according to the blanking signal. | 01-14-2010 |
| 20100123988 | Overcurrent Protection Device for a Power Supply Device and Related Power Supply Device - An overcurrent protection device for a power supply device includes a receiving end for receiving a current sensing signal, a compensating current unit coupled to the receiving end for compensating the current sensing signal in order to generate a current sense compensation signal, a first reference voltage generator for generating a first reference voltage, a comparator coupled between the compensating current unit and the first reference voltage generator for comparing the current sense compensation signal with the first reference voltage in order to generate a comparison result, a control unit coupled to the comparator for controlling a power switch of the power supply device according to the comparison result. | 05-20-2010 |
| 20100165666 | 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 winding of a primary side of the power converter for generating at least one control signal according to a voltage on the auxiliary winding and a reference voltage, a sample-and-hold unit coupled to the auxiliary winding, the comparator, and the control unit for generating the feedback signal according to the voltage on the auxiliary winding and the at least one control signal, and a voltage generator coupled to the control unit, the comparator, and the sample-and-hold unit for generating the reference voltage according to the feedback signal. | 07-01-2010 |
| 20100289463 | 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, a comparator and a sample-and-hold unit. The control unit is utilized for generating a pulse signal according to a feedback signal for controlling on and off states of a switching transistor of the power converter. The comparator is coupled to an auxiliary winding of a primary side of the power converter, and is utilized for generating at least one control signal according to a voltage on the auxiliary winding. The sample-and-hold unit is coupled to the auxiliary winding, the comparator and the control unit, and is utilized for generating the feedback signal according to the voltage on the auxiliary winding and the at least one control signal. | 11-18-2010 |
| 20110228571 | Primary Side Current Controller and Related Power Supply - A primary side current controller for a power supply is disclosed. The primary side current controller includes a waveform detection unit, a calculation unit, and a switching controller. The waveform detection unit is used for detecting a waveform signal of the power supply and generating a captured signal. The calculation unit is coupled to the waveform detection unit and used for generating a selected voltage according to the captured signal and a feedback signal of the power supply. The switching controller is coupled to the calculation unit and used for generating a modulation signal according to the selected voltage and the feedback signal. | 09-22-2011 |
| 20110228572 | OSCILLATOR HAVING TIME-VARIANT FREQUENCY DEVIATION AND RELATED POWER SUPPLY - An oscillator with time-variant frequency deviation for a power supply includes a signal generator for generating a first signal according to a clock signal and a comparing unit for adding an offset to at least one of the first signal and a threshold voltage corresponding to the first signal and for comparing the first signal and the threshold voltage after completion of the offset adding, to generate the clock signal whose frequency deviates with variation of the added offset. | 09-22-2011 |
| 20110228579 | Adjustable Frequency Generator and Related Power Supply - An adjustable frequency generator for a power supply is disclosed. The adjustable frequency generator comprises a waveform generator, a voltage generator and a comparator. The waveform generator is used for generating a saw wave. The voltage generator is used for generating a variable upper reference voltage and a variable lower reference voltage according to variation of a load. The comparator is coupled to the waveform generator and the voltage generator and used for comparing the saw wave with the variable upper reference voltage and the variable lower reference voltage and generating an output signal. A frequency of the output signal decreases when the load becomes lighter. | 09-22-2011 |
