公开(公告)号：US09112404B2

公开(公告)日：2015-08-18

申请号：US14097042

申请日：2013-12-04

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M1/42 ,  H02M7/06

CPC classification number: H02M7/06 ,  H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: An AC-to-DC power converting apparatus includes a power factor correction circuit generating a DC output voltage based on a rectified voltage obtained through rectifying an AC input voltage and on a PWM signal generated based on an adjustment current and a predetermined ramp signal. A multiplier-divider circuit includes: a ramp generating unit generating a ramp signal based on a clock signal and on a first detection voltage associated with the rectified voltage; a control unit generating a control signal based on the clock signal, the ramp signal, and a detection voltage generated based on the DC output voltage; and an output unit generating an adjustment signal based on an input signal associated with the rectified voltage and the control signal.

Abstract translation: AC-DC电力转换装置包括功率因数校正电路，该功率因数校正电路基于通过对AC输入电压进行整流获得的整流电压和基于调整电流和预定斜坡信号产生的PWM信号产生DC输出电压。 乘法器分频器电路包括：斜坡发生单元，其基于时钟信号和与整流电压相关联的第一检测电压产生斜坡信号; 控制单元，基于所述时钟信号，所述斜坡信号和基于所述直流输出电压生成的检测电压来生成控制信号; 以及输出单元，其基于与整流电压和控制信号相关联的输入信号生成调整信号。

公开(公告)号：US20150009719A1

公开(公告)日：2015-01-08

申请号：US14014642

申请日：2013-08-30

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

Abstract translation: 开关电源转换装置包括电压转换模块，检测单元和开关信号产生单元。 电压转换模块将输入电压转换为与次级侧电流相关联的输出电压，该二次侧电流流过变压器的次级绕组并且基于开关信号产生。 检测单元基于输出电压和预定参考电压产生检测信号。 切换信号生成部基于检测信号和调整信号生成切换信号，使得在开关电力转换装置的起动期间次级侧电流逐渐增大。

公开(公告)号：US09647531B2

公开(公告)日：2017-05-09

申请号：US14526187

申请日：2014-10-28

Applicant: Richtek Technology Corp.

Inventor： Tong-Cheng Jao ,  Yi-Wei Lee ,  Isaac Y. Chen

IPC: H02M1/36 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M3/33523 ,  H02M3/33553

Abstract: A soft-start switching power converter includes a voltage converting circuit and a soft-start circuit. The voltage converting circuit includes a transformer, and a first switch which includes a first terminal connected to the transformer, a second terminal providing a trigger signal, and a control terminal receiving a control signal, and which is controlled to switch between conduction and nonconduction, such that the transformer generates a feedback voltage. The soft-start circuit receives the trigger signal, generates the control signal according to the trigger signal, and determines whether or not to clamp the control signal at a preset voltage level based on the trigger signal.

公开(公告)号：US09263940B2

公开(公告)日：2016-02-16

申请号：US14075717

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M3/335 ,  H02M1/42

CPC classification number: H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: A power converter includes a rectifier and a power factor corrector. The rectifier is to be coupled to an alternating current power source and is configured to output a rectified signal. The power factor corrector includes a correcting circuit and a control circuit. The correcting circuit receives the rectified signal and is configured to generate an output voltage based on the rectified signal and a driving signal. The control circuit is configured to generate a first to-be-compared signal based on the rectified signal, to generate a second to-be-compared signal based on the output voltage, to compare the first and second to-be-compared signals, and to generate the driving signal based on a result of comparison performed thereby.

Abstract translation: 功率转换器包括整流器和功率因数校正器。 整流器被耦合到交流电源，并且被配置为输出整流信号。 功率因数校正器包括校正电路和控制电路。 校正电路接收经整流的信号，并且被配置为基于整流信号和驱动信号产生输出电压。 控制电路被配置为基于整流信号产生第一待比较信号，以基于输出电压产生第二待比较信号，以比较第一和第二待比较信号， 并且基于由此执行的比较结果来产生驱动信号。

公开(公告)号：US09203319B2

公开(公告)日：2015-12-01

申请号：US14713654

申请日：2015-05-15

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M3/36

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

Abstract translation: 开关电源转换装置包括电压转换模块，检测单元和开关信号产生单元。 电压转换模块将输入电压转换为与次级侧电流相关联的输出电压，该二次侧电流流过变压器的次级绕组并且基于开关信号产生。 检测单元基于输出电压和预定参考电压产生检测信号。 开关信号生成单元根据检测信号和调整信号生成开关信号，使得在开关电力转换装置的启动期间次级侧电流逐渐增加。

公开(公告)号：US20140340949A1

公开(公告)日：2014-11-20

申请号：US14075717

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M7/217

CPC classification number: H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: A power converter includes a rectifier and a power factor corrector. The rectifier is to be coupled to an alternating current power source and is configured to output a rectified signal. The power factor corrector includes a correcting circuit and a control circuit. The correcting circuit receives the rectified signal and is configured to generate an output voltage based on the rectified signal and a driving signal. The control circuit is configured to generate a first to-be-compared signal based on the rectified signal, to generate a second to-be-compared signal based on the output voltage, to compare the first and second to-be-compared signals, and to generate the driving signal based on a result of comparison performed thereby.

Abstract translation: 功率转换器包括整流器和功率因数校正器。 整流器被耦合到交流电源，并且被配置为输出整流信号。 功率因数校正器包括校正电路和控制电路。 校正电路接收经整流的信号，并且被配置为基于整流信号和驱动信号产生输出电压。 控制电路被配置为基于整流信号产生第一待比较信号，以基于输出电压产生第二待比较信号，以比较第一和第二待比较信号， 并且基于由此执行的比较结果来产生驱动信号。