公开(公告)号：US08643297B2

公开(公告)日：2014-02-04

申请号：US13223660

申请日：2011-09-01

申请人： Ta-Yung Yang ,  Li Lin ,  Chi-Yin Lo ,  Kuo-Hsien Huang ,  Hung-Chun Chen

发明人： Ta-Yung Yang ,  Li Lin ,  Chi-Yin Lo ,  Kuo-Hsien Huang ,  Hung-Chun Chen

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： The present invention provides a control circuit for dimming LED lighting. The control circuit comprises a voltage divider, a controller and an adaptive bleeder. The voltage divider receives an input voltage from an input terminal to generate a dimming signal. The controller generates a switching signal in response to the dimming signal. The controller further generates a control signal in response to the input voltage. The adaptive bleeder receives the control signal and draws a bleeder current from the input terminal in response to the control signal.

摘要翻译： 本发明提供一种用于调光LED照明的控制电路。 控制电路包括分压器，控制器和自适应泄放器。 分压器从输入端接收输入电压以产生调光信号。 控制器响应于调光信号产生开关信号。 控制器还响应于输入电压产生控制信号。 自适应泄放器响应于控制信号接收控制信号并从输入端抽取泄放电流。

公开(公告)号：US20120242252A1

公开(公告)日：2012-09-27

申请号：US13223660

申请日：2011-09-01

申请人： Ta-Yung Yang ,  Li Lin ,  Chi-Yin Lo ,  Kuo-Hsien Huang ,  Hung-Chun Chen

发明人： Ta-Yung Yang ,  Li Lin ,  Chi-Yin Lo ,  Kuo-Hsien Huang ,  Hung-Chun Chen

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： The present invention provides a control circuit for dimming LED lighting. The control circuit comprises a voltage divider, a controller and an adaptive bleeder. The voltage divider receives an input voltage from an input terminal to generate a dimming signal. The controller generates a switching signal in response to the dimming signal. The controller further generates a control signal in response to the input voltage. The adaptive bleeder receives the control signal and draws a bleeder current from the input terminal in response to the control signal.

摘要翻译： 本发明提供一种用于调光LED照明的控制电路。 控制电路包括分压器，控制器和自适应泄放器。 分压器从输入端接收输入电压以产生调光信号。 控制器响应于调光信号产生开关信号。 控制器还响应于输入电压产生控制信号。 自适应泄放器响应于控制信号接收控制信号并从输入端吸取泄放电流。

公开(公告)号：US08432109B2

公开(公告)日：2013-04-30

申请号：US13073095

申请日：2011-03-28

申请人： Ta-Yung Yang ,  Li Lin ,  Chih-Hsien Hsieh ,  Chuh-Ching Li ,  Chi-Yin Lo ,  Kuo-Hsiem Huang

发明人： Ta-Yung Yang ,  Li Lin ,  Chih-Hsien Hsieh ,  Chuh-Ching Li ,  Chi-Yin Lo ,  Kuo-Hsiem Huang

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： A control circuit of a LED driver according to the present invention comprises an output circuit, an input circuit and an input-voltage detection circuit. The output circuit generates a switching signal to produce an output current for driving at least one LED in response to a feedback signal. The switching signal is coupled to switch a transformer. The input circuit samples an input signal for generating the feedback signal. The input signal is correlated to the output current of the LED driver. The input-voltage detection circuit generates an input-voltage signal in response to an input voltage of the LED driver. The input circuit will not sample the input signal when the input-voltage signal is lower than a threshold. The control circuit can eliminate the need of the input capacitor for improving the reliability of the LED driver.

摘要翻译： 根据本发明的LED驱动器的控制电路包括输出电路，输入电路和输入电压检测电路。 输出电路产生开关信号以产生用于响应于反馈信号驱动至少一个LED的输出电流。 开关信号被耦合以切换变压器。 输入电路对输入信号进行采样以产生反馈信号。 输入信号与LED驱动器的输出电流相关。 输入电压检测电路根据LED驱动器的输入电压产生输入电压信号。 当输入电压信号低于阈值时，输入电路不会对输入信号进行采样。 控制电路可以消除输入电容器的需要，提高LED驱动器的可靠性。

公开(公告)号：US08908396B2

公开(公告)日：2014-12-09

申请号：US13611091

申请日：2012-09-12

申请人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang ,  Jung-Sheng Chen

发明人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang ,  Jung-Sheng Chen

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33507 ,  H02M2001/0003

摘要： A control circuit of the power converter according to the present invention comprises a feedback circuit, an output circuit and an adaptive clamping circuit. The feedback circuit generates a feedback signal in accordance with an output of the power converter. The output circuit generates a switching signal in accordance with the feedback signal for regulating the output of the power converter. The adaptive clamping circuit limits the level of the feedback signal under a first level for a first load condition. The feedback circuit determines a slew rate of the feedback signal for increasing the level of the feedback signal from the first level to a second level. The adaptive clamping circuit is disabled and the level of the feedback signal can be increased to the second level for a second load condition.

摘要翻译： 根据本发明的功率转换器的控制电路包括反馈电路，输出电路和自适应钳位电路。 反馈电路根据功率转换器的输出产生反馈信号。 输出电路根据用于调节功率转换器的输出的反馈信号产生开关信号。 自适应钳位电路在第一负载条件下将反馈信号的电平限制在第一电平。 反馈电路确定用于将反馈信号的电平从第一电平增加到第二电平的反馈信号的转换速率。 自适应钳位电路被禁用，并且反馈信号的电平可以在第二负载条件下增加到第二电平。

公开(公告)号：US08711583B2

公开(公告)日：2014-04-29

申请号：US13182291

申请日：2011-07-13

申请人： Ta-Yung Yang ,  Jhih-Da Hsu ,  Ying-Chieh Su ,  Li Lin

发明人： Ta-Yung Yang ,  Jhih-Da Hsu ,  Ying-Chieh Su ,  Li Lin

IPC分类号： H02M3/335

CPC分类号： H02M1/4258 ,  H02M2001/0006 ,  Y02B70/126

摘要： An exemplary embodiment of a power converter is provided. The power converter includes a transformer, a power device, a switching controller, and a capacitor. The power device is coupled to the transformer for switching the transformer to product output of the power converter. The switching controller receives a feedback signal for generating a switching signal coupled to drive the power device. An input circuit of the switching controller is coupled to the transformer to sample an input signal for generating the feedback signal, and the input signal is correlated to the output of the power converter. The capacitor is coupled to the switching controller to provide frequency compensation for a feedback loop of the power converter. Input of the power converter is without an electrolytic capacitor, and a maximum output current of the power converter is a constant current.

摘要翻译： 提供了功率转换器的示例性实施例。 功率转换器包括变压器，功率器件，开关控制器和电容器。 功率器件耦合到变压器，用于将变压器切换到功率转换器的产品输出。 开关控制器接收用于产生耦合以驱动功率器件的开关信号的反馈信号。 开关控制器的输入电路耦合到变压器以对输入信号进行采样以产生反馈信号，并且输入信号与功率转换器的输出相关。 电容器耦合到开关控制器以为功率转换器的反馈回路提供频率补偿。 功率转换器的输入没有电解电容器，功率转换器的最大输出电流为恒定电流。

公开(公告)号：US09007786B2

公开(公告)日：2015-04-14

申请号：US13348963

申请日：2012-01-12

申请人： Ta-Yung Yang ,  Li Lin ,  Chao-Chih Lin

发明人： Ta-Yung Yang ,  Li Lin ,  Chao-Chih Lin

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33507 ,  H02M2001/0022

摘要： The present invention proposes a switching controller of a flyback power converter. The switching controller includes a switching circuit, a sample-and-hold circuit, a voltage detection circuit, an oscillation circuit, and a comparator. The voltage detection circuit generates a holding signal when a level of an input voltage of the flyback power converter is lower than a low-threshold. The oscillation circuit limits the maximum frequency of switching signal. The maximum frequency is increased in response to a decrement of a modulation signal. The modulation signal correlated with a level of the input voltage is used to generate a control signal when the level of the input voltage is lower than an ultra-low-threshold. The control signal is enabled to operate the flyback power converter in continuous current mode operation. Therefore, an input capacitor can be eliminated and manufacturing cost is saved.

摘要翻译： 本发明提出了一种反激式功率转换器的开关控制器。 开关控制器包括开关电路，采样保持电路，电压检测电路，振荡电路和比较器。 当反激式功率转换器的输入电压的电平低于低阈值时，电压检测电路产生保持信号。 振荡电路限制开关信号的最大频率。 响应于调制信号的减少，最大频率增加。 当输入电压的电平低于超低阈值时，与输入电压的电平相关的调制信号用于产生控制信号。 控制信号使能在连续电流模式下操作反激式功率转换器。 因此，可以消除输入电容器并节省制造成本。

公开(公告)号：US08934266B2

公开(公告)日：2015-01-13

申请号：US13591207

申请日：2012-08-21

申请人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

发明人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M2001/0022 ,  H02M2001/0025

摘要： A method for controlling a power converter is provided. The method includes the following steps. A switching signal coupled to switch a transformer for regulating the output of the power converter is generated in accordance with a feedback signal and a ramp signal. The ramp signal is generated in accordance with a switching current signal and a slope compensation signal. The slope compensation signal is generated in response to an input voltage signal. The input voltage signal is generated in response to the level of the input voltage of the power converter. The feedback signal is generated in accordance with the output of the power converter, and the switching current signal is correlated with a switching current of the transformer.

摘要翻译： 提供一种用于控制功率转换器的方法。 该方法包括以下步骤。 根据反馈信号和斜坡信号产生耦合以切换用于调节功率转换器的输出的变压器的开关信号。 斜坡信号根据开关电流信号和斜率补偿信号产生。 斜坡补偿信号是根据输入电压信号产生的。 响应于功率转换器的输入电压的电平而产生输入电压信号。 反馈信号根据功率转换器的输出产生，开关电流信号与变压器的开关电流相关。

公开(公告)号：US20130051098A1

公开(公告)日：2013-02-28

申请号：US13591207

申请日：2012-08-21

申请人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

发明人： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

IPC分类号： H02M7/44

CPC分类号： H02M3/335 ,  H02M2001/0022 ,  H02M2001/0025

摘要： A method for controlling a power converter is provided. The method includes the following steps. A switching signal coupled to switch a transformer for regulating the output of the power converter is generated in accordance with a feedback signal and a ramp signal. The ramp signal is generated in accordance with a switching current signal and a slope compensation signal. The slope compensation signal is generated in response to an input voltage signal. The input voltage signal is generated in response to the level of the input voltage of the power converter. The feedback signal is generated in accordance with the output of the power converter, and the switching current signal is correlated with a switching current of the transformer.

摘要翻译： 提供一种用于控制功率转换器的方法。 该方法包括以下步骤。 根据反馈信号和斜坡信号产生耦合以切换用于调节功率转换器的输出的变压器的开关信号。 斜坡信号根据开关电流信号和斜率补偿信号产生。 斜坡补偿信号是根据输入电压信号产生的。 响应于功率转换器的输入电压的电平而产生输入电压信号。 反馈信号根据功率转换器的输出产生，开关电流信号与变压器的开关电流相关。

公开(公告)号：US08854841B2

公开(公告)日：2014-10-07

申请号：US12840919

申请日：2010-07-21

申请人： Ta-Yung Yang ,  Li Lin ,  Chuh-Ching Li ,  Sheng-Fu Hsu ,  Rui-Hong Lu

发明人： Ta-Yung Yang ,  Li Lin ,  Chuh-Ching Li ,  Sheng-Fu Hsu ,  Rui-Hong Lu

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： A controller for a power converter includes a clamping circuit, a switching circuit and a pulse generator. The clamping circuit is coupled to an input terminal of the controller for detecting a detection signal from a transformer. The switching circuit generates a switching signal to switch the transformer in response to the detection signal for regulating the power converter. A maximum level of the detection signal is clamped to be under a level of a threshold voltage during an off-period of the switching signal. Since the maximum level of the detection signal is clamped and the oscillating energy of the reflected signal is discharged, the speed of detecting the detection signal is increased. Therefore, the regulation of the primary-side controlled power converter can be improved accordingly.

摘要翻译： 一种用于功率转换器的控制器包括钳位电路，开关电路和脉冲发生器。 钳位电路耦合到控制器的输入端，用于检测来自变压器的检测信号。 开关电路响应于用于调节功率转换器的检测信号产生开关信号以切换变压器。 检测信号的最大电平在切换信号的截止周期期间被钳位在阈值电压的电平以下。 由于检测信号的最大电平被钳位并且反射信号的振荡能量被放电，所以检测信号的速度增加。 因此，可以相应地改善初级侧受控功率转换器的调节。

公开(公告)号：US08593833B2

公开(公告)日：2013-11-26

申请号：US13013100

申请日：2011-01-25

申请人： Ta-Yung Yang ,  Li Lin

发明人： Ta-Yung Yang ,  Li Lin

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： A control circuit of a power converter according to the present invention comprises an output circuit, at least one input circuit and an input-voltage detection circuit. The output circuit generates a switching signal for regulating an output of the power converter in response to at least one feedback signal. The switching signal is coupled to switch a transformer of the power converter. The input circuit samples at least one input signal for generating the feedback signal. The input signal is correlated to the output of the power converter. The input-voltage detection circuit generates an input-voltage signal in response to the level of the an input voltage of the power converter. The input circuit will not sample the input signal when the input-voltage signal is lower than a threshold. The control circuit can eliminate the need of the input capacitor for improving the reliability of the power converter.

摘要翻译： 根据本发明的功率转换器的控制电路包括输出电路，至少一个输入电路和输入电压检测电路。 输出电路响应于至少一个反馈信号产生用于调节功率转换器的输出的开关信号。 开关信号被耦合以切换功率转换器的变压器。 输入电路对至少一个用于产生反馈信号的输入信号进行采样。 输入信号与功率转换器的输出相关。 输入电压检测电路响应于功率转换器的输入电压的电平产生输入电压信号。 当输入电压信号低于阈值时，输入电路不会对输入信号进行采样。 控制电路可以消除输入电容器的需要，提高功率转换器的可靠性。