Grenergy Opto Inc.

System General Corporation

Noveltek Semiconductor Corp.

Taiwan Semiconductor Manufacturing Comp. Ltd.

Chin-Yen Lin

Yen-Hui Wang

Chia-Chieh Hung

Li Kuei Lin

Jung-Sheng Chen

Chi-Hao Wu

Min-Chu Chien

Ta-Yung Yang

Yue-Hong Tang

Hsien-Jung Hsu

Yu-Min Shih

Hsiang-Jui Cheng

A sampling circuit of the power converter according to the present invention comprises an amplifier circuit receiving a reflected voltage for generating a first signal. A first switch and a first capacitor are utilized to generate a second signal in response to the reflected voltage. A sample-signal circuit generates a sample signal in response to a falling edge of a switching signal. The switching signal is generated in accordance with a feedback signal for regulating an output of the power converter. The feedback signal is generated in accordance with the second signal. The sample signal is utilized to control the first switch for sampling the reflected voltage. The sample signal is disabled once the first signal is lower than the second signal. The sampling circuit precisely samples the reflected voltage of the transformer of the power converter for regulating the output of the power converter.

Sampling circuit for measuring the reflected voltage of transformer for power converter

A controller of the power converter according to the present invention comprises a gate driver. The gate driver generates a gate-drive signal. The gate-drive signal is coupled to drive a power transistor to switch a transformer of the power converter for regulating an output of the power converter. The gate driver has a charge-pump circuit for charging pump a voltage level of the gate-drive signal. Therefore, the gate-drive signal can fully turn on the power transistor.

Transistor gate driver with charge pump circuit for offline power converters

A sampling circuit of the power converter according to the present invention comprises an amplifier circuit receiving a reflected voltage for generating a first signal. A first switch and a first capacitor are utilized to generate a second signal in response to the reflected voltage. A sample-signal circuit generates a sample signal in response to the disable of a switching signal. The switching signal is generated in accordance with a feedback signal for regulating an output of the power converter. The feedback signal is generated in accordance with the second signal. The sample signal is utilized to control the first switch for sampling the reflected voltage. The sample signal is disabled once the first signal is lower than the second signal. The sampling circuit precisely samples the reflected voltage of the transformer of the power converter for regulating the output of the power converter.

Sampling circuit for measuring reflected voltage of transformer for power converter operated in DCM and CCM

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.

Primary side current controller and related power supply

A controller for a power supply having a primary side and a secondary side includes a mapping circuit for generating a feedback signal corresponding to an output current of the secondary side, a power switch coupled to the primary side for conducting a connection according to a modulation signal, a constant current block, for generating a first current signal according to the feedback signal; and a control unit, for generating the modulation signal to control the power switch according to the first current signal.

Low cost high power factor LED driver

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.

Oscillator having time-variant frequency deviation and related power supply

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.

Current-level controlling device for a power supply device and related power supply device

This patent discloses an efficient PWM controller for generating a pulse signal in response to a feedback signal, capable of operating in a normal mode or a green mode, comprising: a capacitor for building a saw-tooth signal by current integration, the saw-tooth signal having a ramp-up period and a ramp-down period; a first composite current source for the ramp-up period, detachable into a first constant current source and a first variable current source; and a second composite current source for the ramp-down period, detachable into a second constant current source and a second variable current source; wherein, the first variable current source is attached to the first constant current source and the second variable current source is attached to the second constant current source respectively in the green mode.

Efficient PWM controller

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.

Primary-side feedback control device and related method for a power converter

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.

Overcurrent protection device for a power supply device and related power supply device

A flexible recipe modeling system and method is provided for improving the processing reliability of a fabrication process by customizing recipes processed by fabrication equipment including associated different chambers of a multi-chamber processing machine by allowing a responsible engineer to add or modify individual recipe clusters including grouping of recipes into clusters to represent the same process capacity for a piece of fabrication equipment and providing a material execute system having a recipe cluster management engine (RCME) for management of the RCMS.

Growing community of inventors

Hsinchu County, Taiwan

Chin-Yen Lin