公开(公告)号：US20070200633A1

公开(公告)日：2007-08-30

申请号：US11357044

申请日：2006-02-21

Applicant: Cheng-Sung Chen ,  Ta-Yung Yang ,  Rui-Hong Lu

Inventor： Cheng-Sung Chen ,  Ta-Yung Yang ,  Rui-Hong Lu

IPC: H03L7/085

CPC classification number: H03L7/00 ,  H02M3/156 ,  H02M3/1563

Abstract: The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is coupled to the first circuit to generate a second signal in accordance with the frequency of the first signal. Only when the first signal is operated in a specific frequency range, the synchronous operation is allowed. An oscillation circuit is connected to the first circuit and the second circuit to receive the first signal and the second signal to generate an oscillation signal. The oscillation signal is utilized to enable the switching signal of the power converter. The switching signal is thus synchronized with the input synchronous signal in response to the enable of the second signal. Otherwise, the switching signal will be free running.

Abstract translation: 本发明提供一种用于可变开关频率功率转换器的同步开关控制电路。 它包括响应于功率转换器的输入同步信号产生第一信号的第一电路。 第二电路耦合到第一电路，以根据第一信号的频率产生第二信号。 只有当第一个信号在特定频率范围内工作时，允许同步操作。 振荡电路连接到第一电路和第二电路以接收第一信号和第二信号以产生振荡信号。 振荡信号用于使能功率转换器的开关信号。 因此，响应于第二信号的使能，切换信号与输入同步信号同步。 否则，切换信号将自由运行。

公开(公告)号：US20070109820A1

公开(公告)日：2007-05-17

申请号：US11274125

申请日：2005-11-16

Applicant: Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Tso-Min Chen

Inventor： Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Tso-Min Chen

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  Y02B70/1433

Abstract: The present invention provides a power converter having a phase lock circuit for quasi-resonant soft switching. The power converter includes a first circuit coupled to the feedback signal to generate a switching signal for switching a switching device and regulating the output of the power converter. A second circuit is coupled to an auxiliary winding of the transformer for generating a voltage signal in response to the voltage of the transformer. A phase lock circuit generates a control signal to enable the switching signal in accordance with the voltage signal. The switching signal further turns on the switching device in response to a valley voltage across the switching device.

Abstract translation: 本发明提供一种具有用于准谐振软开关的锁相电路的功率转换器。 功率转换器包括耦合到反馈信号的第一电路以产生用于切换开关装置并调节功率转换器的输出的开关信号。 第二电路耦合到变压器的辅助绕组，以响应于变压器的电压产生电压信号。 锁相电路根据电压信号产生控制信号以使能切换信号。 开关信号进一步响应于开关器件上的谷值电压而导通开关器件。

公开(公告)号：US08698474B2

公开(公告)日：2014-04-15

申请号：US13095074

申请日：2011-04-27

Applicant: Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

Inventor： Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

IPC: G05F1/00 ,  H02M1/00

CPC classification number: H02M1/36

Abstract: A start-up circuit with low standby power loss for power converters according to present invention comprises a first diode and a second diode coupled to an input voltage of the power converter. A start-up resistor is coupled to the join of the first diode and the second diode. A high-voltage switch is coupled to the start-up resistor to generate a power source. A control circuit generates a switching signal for switching a transformer. A detection circuit generates a disable signal in response to the input voltage to disable the switching signal. A winding of the transformer is coupled to the power source to generate the power for the power source. The high-voltage switch is turned off to cut off the start-up resistor for saving the power loss once the voltage of the power source is higher than a threshold.

Abstract translation: 根据本发明的用于功率转换器的具有低备用功率损耗的启动电路包括耦合到功率转换器的输入电压的第一二极管和第二二极管。 启动电阻耦合到第一二极管和第二二极管的连接。 高压开关耦合到启动电阻器以产生电源。 控制电路产生用于切换变压器的开关信号。 检测电路响应于输入电压产生禁止信号以禁用开关信号。 变压器的绕组耦合到电源以产生用于电源的电力。 一旦电源电压高于阈值，高电压开关就关闭，以切断启动电阻，以节省功率损耗。

公开(公告)号：US08649191B2

公开(公告)日：2014-02-11

申请号：US12579462

申请日：2009-10-15

Applicant: Ta-Yung Yang ,  Chou-Sheng Wang ,  Rui-Hong Lu

Inventor： Ta-Yung Yang ,  Chou-Sheng Wang ,  Rui-Hong Lu

IPC: H02M3/335

CPC classification number: H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A synchronous rectifier for a switching power converter is provided and includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for the rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a phase-lock circuit. The phase-lock circuit generates an off signal to switch off the power transistor in response to a pulse width of the drive signal. The pulse width of the drive signal is shorter than a turned-on period of the diode. The phase-lock circuit further reduces the pulse width of the drive signal in response to a feedback signal. The feedback signal is correlated to an output load of the power converter.

Abstract translation: 提供了一种用于开关功率转换器的同步整流器，其包括功率晶体管，二极管和控制电路。 功率晶体管和二极管耦合到变压器和用于整流的功率转换器的输出端。 一旦二极管正向偏置，控制电路产生驱动信号来接通功率晶体管。 控制电路包括锁相电路。 锁相电路响应于驱动信号的脉冲宽度产生截止信号以关断功率晶体管。 驱动信号的脉冲宽度比二极管的导通时间短。 相位锁定电路还响应于反馈信号进一步减小驱动信号的脉冲宽度。 反馈信号与功率转换器的输出负载相关。

公开(公告)号：US08542507B2

公开(公告)日：2013-09-24

申请号：US13069534

申请日：2011-03-23

Applicant: Jhih-Da Hsu ,  Chia-Yo Yeh ,  Chou-Sheng Wang ,  Ying-Chieh Su ,  Rui-Hong Lu

Inventor： Jhih-Da Hsu ,  Chia-Yo Yeh ,  Chou-Sheng Wang ,  Ying-Chieh Su ,  Rui-Hong Lu

IPC: H02H7/125 ,  H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: An adaptive synchronous rectification control circuit and a control method are developed. The control circuit comprises an adaptive circuit that generates a reference signal in response to a detection signal of a power converter. A clamped circuit clamps the reference signal at a threshold voltage if the reference signal equals or is greater than the threshold voltage. A switching circuit generates a control signal to control a synchronous switch of the power converter in response to the detection signal and the reference signal. The control method generates the reference signal in response to the detection signal. The reference signal is clamped at the threshold voltage if the reference signal equals or is greater than the threshold voltage. The method further generates the control signal to control the synchronous switch of the power converter in response to the detection signal and the reference signal.

Abstract translation: 开发了自适应同步整流控制电路和控制方法。 控制电路包括响应于功率转换器的检测信号产生参考信号的自适应电路。 如果参考信号等于或大于阈值电压，钳位电路将参考信号钳位在阈值电压。 切换电路响应于检测信号和参考信号产生控制信号以控制功率转换器的同步开关。 控制方法响应于检测信号产生参考信号。 如果参考信号等于或大于阈值电压，则参考信号被钳位在阈值电压。 该方法还响应于检测信号和参考信号产生控制信号以控制功率转换器的同步开关。

公开(公告)号：US20120249220A1

公开(公告)日：2012-10-04

申请号：US13073862

申请日：2011-03-28

Applicant: Rui-Hong Lu ,  Han-Chung Tai ,  Hsin-Chih Chiang

Inventor： Rui-Hong Lu ,  Han-Chung Tai ,  Hsin-Chih Chiang

IPC: H01H37/74

CPC classification number: G11C17/18 ,  G11C17/16

Abstract: A trim circuit for a power supply controller includes: a control circuit; at least a capacitance type programmable circuit connection; and a switching circuit, under control of the control circuit, the switching circuit selectively coupling the capacitance type programmable circuit connection to anyone of an operation voltage and a programming voltage, for determining a programming state of the capacitance type programmable circuit connection.

Abstract translation: 电源控制器的微调电路包括：控制电路; 至少电容式可编程电路连接; 以及开关电路，在所述控制电路的控制下，所述开关电路将所述电容式可编程电路连接选择性地耦合到任何操作电压和编程电压，以确定所述电容型可编程电路连接的编程状态。

公开(公告)号：US20100201334A1

公开(公告)日：2010-08-12

申请号：US12579462

申请日：2009-10-15

Applicant: Ta-Yung Yang ,  Chou-Sheng Wang ,  Rui-Hong Lu

Inventor： Ta-Yung Yang ,  Chou-Sheng Wang ,  Rui-Hong Lu

IPC: G05F1/10

CPC classification number: H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A synchronous rectifier for a switching power converter is provided and includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for the rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a phase-lock circuit. The phase-lock circuit generates an off signal to switch off the power transistor in response to a pulse width of the drive signal. The pulse width of the drive signal is shorter than a turned-on period of the diode. The phase-lock circuit further reduces the pulse width of the drive signal in response to a feedback signal. The feedback signal is correlated to an output load of the power converter.

Abstract translation: 提供了一种用于开关功率转换器的同步整流器，其包括功率晶体管，二极管和控制电路。 功率晶体管和二极管耦合到变压器和用于整流的功率转换器的输出端。 一旦二极管正向偏置，控制电路产生驱动信号来接通功率晶体管。 控制电路包括锁相电路。 锁相电路响应于驱动信号的脉冲宽度产生截止信号以关断功率晶体管。 驱动信号的脉冲宽度比二极管的导通时间短。 相位锁定电路还响应于反馈信号进一步减小驱动信号的脉冲宽度。 反馈信号与功率转换器的输出负载相关。

公开(公告)号：US07760478B2

公开(公告)日：2010-07-20

申请号：US11687056

申请日：2007-03-16

Applicant: Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

Inventor： Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

IPC: H02H7/00

CPC classification number: H02M1/32 ,  H02M3/33507 ,  H02M2001/0009

Abstract: A control circuit includes a detection circuit to detect the short-circuited of a current sense terminal of the power converter. It includes a comparator, a verification circuit and a timer circuit. The comparator receives an input signal for generating a sense signal. The input signal represents the switching current of a power switch. The sense signal is enabled when the input signal is lower than a threshold. The verification circuit generates a protection signal in response to the sense signal or/and -a delay signal. The protection signal is generated when the current sense terminal is short-circuited, in which the power switch and the sense signal are enabled after the time delay of the delay signal. The protection signal turns off the power switch for the protection.

Abstract translation: 控制电路包括用于检测功率转换器的电流检测端子短路的检测电路。 它包括比较器，验证电路和定时器电路。 比较器接收用于产生感测信号的输入信号。 输入信号表示电源开关的开关电流。 当输入信号低于阈值时，感测信号被使能。 验证电路响应于感测信号或/和延迟信号产生保护信号。 当电流检测端子短路时，产生保护信号，其中在延迟信号的延时之后使能电源开关和感测信号。 保护信号关闭电源开关以进行保护。

公开(公告)号：US20100091420A1

公开(公告)日：2010-04-15

申请号：US12338112

申请日：2008-12-18

Applicant: Meng-Jen TSAI ,  Choa-Chih Lin ,  Rui-Hong Lu ,  Chiu-Chih Chiang

Inventor： Meng-Jen TSAI ,  Choa-Chih Lin ,  Rui-Hong Lu ,  Chiu-Chih Chiang

IPC: H02H3/24 ,  H02H9/02

CPC classification number: H02H7/1213 ,  H02M1/32 ,  H02M3/33507

Abstract: A control circuit with protection circuit for power supply according to the present invention comprises a peak-detection circuit and a protection circuit. The peak-detection circuit detects an AC input voltage and generates a peak-detection signal. The protection circuit generates a reset signal to reduce the output of the power supply in response to the peak-detection signal. The present invention can protect the power supply in response to the AC input voltage effectively through the peak-detection circuit.

Abstract translation: 根据本发明的具有电源保护电路的控制电路包括峰值检测电路和保护电路。 峰值检测电路检测交流输入电压并产生峰值检测信号。 保护电路产生复位信号，以响应峰值检测信号减小电源的输出。 本发明可以通过峰值检测电路有效地响应于AC输入电压来保护电源。

公开(公告)号：US20080232018A1

公开(公告)日：2008-09-25

申请号：US11687056

申请日：2007-03-16

Applicant: Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

Inventor： Ta-Yung Yang ,  Wei-Hsuan Huang ,  Rui-Hong Lu

IPC: H02H3/00

CPC classification number: H02M1/32 ,  H02M3/33507 ,  H02M2001/0009

Abstract: A control circuit includes a detection circuit to detect the short-circuited of a current sense terminal of the power converter. It includes a comparator, a verification circuit and a timer circuit. The comparator receives an input signal for generating a sense signal. The input signal represents the switching current of a power switch. The sense signal is enabled when the input signal is lower than a threshold. The verification circuit generates a protection signal in response to the sense signal or/and -a delay signal. The protection signal is generated when the current sense terminal is short-circuited, in which the power switch and the sense signal are enabled after the time delay of the delay signal. The protection signal turns off the power switch for the protection.

Abstract translation: 控制电路包括用于检测功率转换器的电流检测端子短路的检测电路。 它包括比较器，验证电路和定时器电路。 比较器接收用于产生感测信号的输入信号。 输入信号表示电源开关的开关电流。 当输入信号低于阈值时，感测信号被使能。 验证电路响应于感测信号或/和延迟信号产生保护信号。 当电流检测端子短路时，产生保护信号，其中在延迟信号的延时之后使能电源开关和感测信号。 保护信号关闭电源开关以进行保护。