公开(公告)号：US08094468B2

公开(公告)日：2012-01-10

申请号：US12255636

申请日：2008-10-21

申请人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ying-Chieh Su ,  Chih-Chi Chang

发明人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ying-Chieh Su ,  Chih-Chi Chang

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1491

摘要： A control circuit is developed to adaptively operate a power converter at quasi-resonance (QR) and in a continuous current mode (CCM) to achieve high efficiency. The control circuit includes a PWM circuit generating a switching signal coupled to switch a transformer. A signal generation circuit generates a ramp signal and a pulse signal. The pulse signal is generated in response to the ramp signal for switching on the switching signal. A feedback circuit produces a feedback signal according to an output load of the power converter. The feedback signal is coupled to switch off the switching signal. A detection circuit is coupled to the transformer for generating a valley signal in response to the waveform of the transformer. The valley signal is further coupled to generate the pulse signal when the ramp signal is lower than a threshold. The level of the threshold is correlated to the feedback signal.

摘要翻译： 开发了一种控制电路来自适应地以准谐振（QR）和连续电流模式（CCM）操作功率转换器，以实现高效率。 控制电路包括产生耦合以切换变压器的开关信号的PWM电路。 信号发生电路产生斜坡信号和脉冲信号。 响应于用于接通开关信号的斜坡信号产生脉冲信号。 反馈电路根据功率转换器的输出负载产生反馈信号。 反馈信号被耦合以切断开关信号。 检测电路耦合到变压器，以响应于变压器的波形产生谷值信号。 谷值信号还被耦合以在斜坡信号低于阈值时产生脉冲信号。 阈值的电平与反馈信号相关。

公开(公告)号：US20100097104A1

公开(公告)日：2010-04-22

申请号：US12255636

申请日：2008-10-21

申请人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ying-Chieh Su ,  Chih-Chi Chang

发明人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ying-Chieh Su ,  Chih-Chi Chang

IPC分类号： H02M11/00

CPC分类号： H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1491

摘要： A control circuit is developed to adaptively operate a power converter at quasi-resonance (QR) and in a continuous current mode (CCM) to achieve high efficiency. The control circuit includes a PWM circuit generating a switching signal coupled to switch a transformer. A signal generation circuit generates a ramp signal and a pulse signal. The pulse signal is generated in response to the ramp signal for switching on the switching signal. A feedback circuit produces a feedback signal according to an output load of the power converter. The feedback signal is coupled to switch off the switching signal. A detection circuit is coupled to the transformer for generating a valley signal in response to the waveform of the transformer. The valley signal is further coupled to generate the pulse signal when the ramp signal is lower than a threshold. The level of the threshold is correlated to the feedback signal.

摘要翻译： 开发了一种控制电路来自适应地以准谐振（QR）和连续电流模式（CCM）操作功率转换器，以实现高效率。 控制电路包括产生耦合以切换变压器的开关信号的PWM电路。 信号发生电路产生斜坡信号和脉冲信号。 响应于用于接通开关信号的斜坡信号产生脉冲信号。 反馈电路根据功率转换器的输出负载产生反馈信号。 反馈信号被耦合以切断开关信号。 检测电路耦合到变压器，以响应于变压器的波形产生谷值信号。 谷值信号还被耦合以在斜坡信号低于阈值时产生脉冲信号。 阈值的电平与反馈信号相关。

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：US08587964B2

公开(公告)日：2013-11-19

申请号：US13182839

申请日：2011-07-14

申请人： Ta-yung Yang ,  Jung-Sheng Chen ,  Chuh-Ching Li ,  Chih-Hsien Hsieh

发明人： Ta-yung Yang ,  Jung-Sheng Chen ,  Chuh-Ching Li ,  Chih-Hsien Hsieh

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0035 ,  H02M2001/0054 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02B70/16

摘要： A control circuit for power converter according to the present invention comprises a PWM circuit generating a switching signal coupled to switch a transformer of the power converter. A feedback input circuit is coupled to an output of the power converter for generating a feedback signal. The feedback signal is coupled to turn off the switching signal. A detection circuit is coupled to the transformer for generating a valley signal in response to a waveform of the transformer. A frequency-variation circuit is coupled to receive the feedback signal and the valley signal for generating a frequency-variation signal. The frequency-variation signal is coupled to turn on the switching signal. A burst circuit is coupled to receive the feedback signal for generating a burst signal to disable the switching signal.

摘要翻译： 根据本发明的用于功率转换器的控制电路包括PWM电路，其产生耦合以切换功率转换器的变压器的开关信号。 反馈输入电路耦合到功率转换器的输出端，用于产生反馈信号。 反馈信号被耦合以关闭开关信号。 检测电路耦合到变压器，以响应于变压器的波形产生谷值信号。 频率变化电路被耦合以接收反馈信号和谷值信号以产生频率变化信号。 频率变化信号被耦合以接通开关信号。 突发电路被耦合以接收反馈信号以产生突发信号以禁用开关信号。

公开(公告)号：US07426120B2

公开(公告)日：2008-09-16

申请号：US11287268

申请日：2005-11-28

申请人： Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Pei-Sheng Tsu

发明人： Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Pei-Sheng Tsu

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  Y02B70/1433

摘要： The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control circuit includes a control circuit coupled to the feedback signal to generate a switching signal. Through an output circuit, the switching signal drives a switching device for switching a transformer and regulating the output of the power converter. The valley voltage detector is coupled to an auxiliary winding of the transformer for generating a control signal in response to the voltage of the transformer. The control signal is used for enabling the switching signal. The switching signal further turns on the switching device in response to a valley voltage across the switching device.

摘要翻译： 本发明提供一种具有谷值电压检测器的开关控制电路，以实现软开关并提高功率转换器的效率。 开关控制电路包括耦合到反馈信号的控制电路以产生开关信号。 通过输出电路，开关信号驱动用于切换变压器并调节功率转换器的输出的开关装置。 谷值电压检测器耦合到变压器的辅助绕组，以响应于变压器的电压产生控制信号。 控制信号用于启用切换信号。 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：US20080136393A1

公开(公告)日：2008-06-12

申请号：US12024053

申请日：2008-01-31

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng-Cheng Tsao

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng-Cheng Tsao

IPC分类号： G05F1/10

CPC分类号： H02M3/33523

摘要： A switching regulator includes a switching device to switch a transformer from a primary-side to secondary side. A control circuit generates a switching signal for regulating output of the switching regulator. The control circuit includes a first circuit to generate a first signal and a timing signal by measuring a reflected signal of the transformer. A second circuit produces a second signal by integrating a current signal with the timing signal. The current signal represents a primary-side switching current of the transformer. A first feedback circuit produces a first feedback signal in response to the first signal and the reference signal, in which the reference signal is varied in response to the change of the second signal. Furthermore, a second feedback circuit generates a second feedback signal in response to the second signal. A switching control circuit generates the switching signal in response to the feedback signals.

摘要翻译： 开关调节器包括用于将变压器从初级侧切换到次级侧的开关装置。 控制电路产生用于调节开关调节器的输出的开关信号。 控制电路包括通过测量变压器的反射信号产生第一信号和定时信号的第一电路。 第二电路通过将电流信号与定时信号进行积分而产生第二信号。 电流信号表示变压器的初级侧开关电流。 第一反馈电路响应于第一信号和参考信号产生第一反馈信号，其中参考信号响应于第二信号的变化而变化。 此外，第二反馈电路响应于第二信号产生第二反馈信号。 开关控制电路根据反馈信号产生开关信号。

公开(公告)号：US20070103134A1

公开(公告)日：2007-05-10

申请号：US11270867

申请日：2005-11-08

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng Tsao

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng Tsao

IPC分类号： G05F1/00

CPC分类号： H02M3/33523

摘要： A switching regulator includes a switching device to switch a transformer from a primary-side to secondary side. A control circuit generates a switching signal for regulating output of the switching regulator. The control circuit includes a first circuit to generate a first signal and a timing signal by measuring a reflected signal of the transformer. A second circuit produces a second signal by integrating a current signal with the timing signal. The current signal represents a primary-side switching current of the transformer. A first feedback circuit produces a first feedback signal in response to the first signal and the reference signal, in which the reference signal is varied in response to the change of the second signal. Furthermore, a second feedback circuit generates a second feedback signal in response to the second signal. A switching control circuit generates the switching signal in response to the feedback signals.

摘要翻译： 开关调节器包括用于将变压器从初级侧切换到次级侧的开关装置。 控制电路产生用于调节开关调节器的输出的开关信号。 控制电路包括通过测量变压器的反射信号产生第一信号和定时信号的第一电路。 第二电路通过将电流信号与定时信号进行积分而产生第二信号。 电流信号表示变压器的初级侧开关电流。 第一反馈电路响应于第一信号和参考信号产生第一反馈信号，其中参考信号响应于第二信号的变化而变化。 此外，第二反馈电路响应于第二信号产生第二反馈信号。 开关控制电路根据反馈信号产生开关信号。

公开(公告)号：US08742677B2

公开(公告)日：2014-06-03

申请号：US12978836

申请日：2010-12-27

申请人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ming-Chieh Lee ,  Kuo-Hsien Huang

发明人： Ta-Yung Yang ,  Chuh-Ching Li ,  Ming-Chieh Lee ,  Kuo-Hsien Huang

IPC分类号： H05B41/16

CPC分类号： H05B33/0815 ,  H05B33/0818 ,  Y02B20/347

摘要： A LED drive circuit according to the present invention comprises a controller and a programmable signal. The controller generates a switching signal coupled to switch a magnetic device for generating an output current to drive a plurality of LEDs. The programmable signal is coupled to regulate a current-control signal of the controller. The switching signal is modulated in response to the current-control signal for regulating the output current, and the level of the output current is correlated to the current-control signal.

摘要翻译： 根据本发明的LED驱动电路包括控制器和可编程信号。 控制器产生耦合以切换磁性装置以产生输出电流以驱动多个LED的切换信号。 可编程信号被耦合以调节控制器的电流控制信号。 响应于用于调节输出电流的电流控制信号来调制开关信号，并且输出电流的电平与电流控制信号相关。

公开(公告)号：US20090058389A1

公开(公告)日：2009-03-05

申请号：US11845261

申请日：2007-08-27

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng-Cheng Tsao

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng-Cheng Tsao

IPC分类号： G05F5/04

CPC分类号： H02M3/33507

摘要： A switching control circuit is provided for measuring and regulating an output current of a power converter. The power converter is operated under continuous current mode. A detection circuit generates a continuous-current signal and a peak-current signal by detecting a switching current of an inductive device. An integration circuit generates an average-current signal in response to the continuous-current signal, the peak-current signal and an off time of a switching signal. The switching control circuit generates the switching signal in response to the average-current signal. The switching signal is coupled to switch the inductive device and regulate the output current of the power converter. A time constant of the integration circuit is correlated to the switching period of the switching signal, therefore the average-current signal will be proportional to the output current.

摘要翻译： 提供了用于测量和调节功率转换器的输出电流的开关控制电路。 电源转换器在连续电流模式下运行。 检测电路通过检测电感器件的开关电流来产生连续电流信号和峰值电流信号。 积分电路响应于连续电流信号，峰值电流信号和切换信号的关断时间产生平均电流信号。 开关控制电路根据平均电流信号产生开关信号。 开关信号被耦合以切换感应装置并调节功率转换器的输出电流。 积分电路的时间常数与开关信号的开关周期相关，因此平均电流信号将与输出电流成正比。

公开(公告)号：US07471121B2

公开(公告)日：2008-12-30

申请号：US11614928

申请日：2006-12-21

申请人： Ta-Yung Yang ,  Feng-Cheng Tsao ,  Chuh-Ching Li ,  Jesse R. Wang

发明人： Ta-Yung Yang ,  Feng-Cheng Tsao ,  Chuh-Ching Li ,  Jesse R. Wang

IPC分类号： H03K3/00

CPC分类号： H03K17/6871 ,  H02M1/08 ,  H02M3/335 ,  H03K17/08122 ,  H03K17/162 ,  H03K17/22

摘要： A transistor drive circuit of a power converter is developed for operating in a wide voltage range. It includes an N-type high-side transistor, a P-type high-side transistor and an N-type low-side transistor. A voltage clamp device is connected to the gate of the N-type high-side transistor to limit the maximum output voltage. A detection circuit is coupled to detect the supply voltage of the transistor drive circuit to generate a disable signal in response to the voltage level of the supply voltage. The disable signal is coupled to disable the P-type high-side transistor once the voltage level of the supply voltage is higher than a threshold voltage.

摘要翻译： 开发了功率转换器的晶体管驱动电路，用于在宽电压范围内工作。 它包括N型高边晶体管，P型高边晶体管和N型低边晶体管。 电压钳位装置连接到N型高侧晶体管的栅极以限制最大输出电压。 耦合检测电路以检测晶体管驱动电路的电源电压以响应于电源电压的电压电平而产生禁用信号。 一旦电源电压的电压电平高于阈值电压，禁止信号被耦合以禁用P型高侧晶体管。