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：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：US07701734B2

公开(公告)日：2010-04-20

申请号：US11465364

申请日：2006-08-17

申请人： Chuh-Ching Li ,  Ta-yung Yang

发明人： Chuh-Ching Li ,  Ta-yung Yang

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0009

摘要： A circuit and a method for detecting a voltage of a transformer are provided. The circuit includes a current output circuit coupled to a winding of a transformer to generate a current signal. A current-to-voltage circuit is coupled to the current output circuit to generate a voltage signal in response to the current signal. A sample-and-hold circuit generates an output signal by sampling the voltage signal. An input voltage is applied to the transformer. The output signal is correlated to the input voltage of the transformer.

摘要翻译： 提供了用于检测变压器电压的电路和方法。 电路包括耦合到变压器绕组的电流输出电路以产生电流信号。 电流 - 电压电路耦合到电流输出电路以响应于电流信号产生电压信号。 采样和保持电路通过对电压信号进行采样来产生输出信号。 输入电压施加到变压器。 输出信号与变压器的输入电压相关。

公开(公告)号：US07671578B2

公开(公告)日：2010-03-02

申请号：US11456573

申请日：2006-07-11

申请人： Chuh-Ching Li ,  Ta-yung Yang

发明人： Chuh-Ching Li ,  Ta-yung Yang

IPC分类号： G01R31/02 ,  H02M3/335

CPC分类号： G01R15/183

摘要： A circuit for detecting an input voltage of a transformer is provided. The circuit includes a current source circuit coupled to a winding of a transformer. A current-to-voltage circuit is coupled to the current source circuit to generate a first voltage in response to a current outputted from the current source circuit. A sample-and-hold circuit generates an output voltage by sampling the first voltage. The transformer is coupled to the input voltage, and the output voltage is correlated to the input voltage of the transformer.

摘要翻译： 提供了用于检测变压器的输入电压的电路。 电路包括耦合到变压器绕组的电流源电路。 电流 - 电压电路耦合到电流源电路以响应于从电流源电路输出的电流产生第一电压。 采样保持电路通过对第一电压进行采样来产生输出电压。 变压器耦合到输入电压，输出电压与变压器的输入电压相关。

公开(公告)号：US07663352B2

公开(公告)日：2010-02-16

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： G05F1/00 ,  H02M7/44 ,  H02M3/24

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：US20060056204A1

公开(公告)日：2006-03-16

申请号：US10943318

申请日：2004-09-16

申请人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Shao-Wei Chiu

发明人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Shao-Wei Chiu

IPC分类号： H02M5/27

CPC分类号： H02M3/33507

摘要： The present invention discloses a switching control circuit for a primary-side controlled power converter. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by measuring a primary-side switching current. An integrator generates a current-feedback signal by integrating the current-waveform signal with the discharge time. A time constant of the integrator is correlated with the switching frequency, thus the current-feedback signal is proportional to an output current of the power converter. A PWM circuit controls the pulse width of the switching signal in response to the outputs of a voltage-loop error amplifier and a current-loop error amplifier. The output voltage and the maximum output current of the power converter are therefore regulated.

摘要翻译： 本发明公开了一种用于初级侧受控电力转换器的开关控制电路。 电压波形检测器产生电压反馈信号和放电时间信号。 电流波形检测器通过测量初级侧开关电流产生电流波形信号。 积分器通过将电流波形信号与放电时间进行积分来产生电流反馈信号。 积分器的时间常数与开关频率相关，因此电流反馈信号与功率转换器的输出电流成比例。 PWM电路响应于电压环路误差放大器和电流环路误差放大器的输出来控制开关信号的脉冲宽度。 因此调节功率转换器的输出电压和最大输出电流。

公开(公告)号：US07492613B2

公开(公告)日：2009-02-17

申请号：US11288726

申请日：2005-11-28

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： H02M3/335

CPC分类号： H02M3/33523 ,  H01F27/38

摘要： A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the reflected voltage detection. Furthermore, a blanking circuit ensures a minimum pulse width of the reflected voltage.

摘要翻译： 提供了用于检测变压器的反射电压的控制电路。 开发了用于对反射电压进行采样的检测电路。 因为反射电压的脉冲宽度在轻负载时较窄，因此偏置电路用于产生偏置信号以帮助反射电压检测。 此外，消隐电路确保反射电压的最小脉冲宽度。

公开(公告)号：US20080309380A1

公开(公告)日：2008-12-18

申请号：US11763138

申请日：2007-06-14

申请人： Ta-yung Yang ,  Chuh-Ching Li

发明人： Ta-yung Yang ,  Chuh-Ching Li

IPC分类号： H03K5/01

CPC分类号： H02M3/33507 ,  G01R19/0092 ,  H02M2001/0009

摘要： The present invention provides a method and apparatus for detecting a continuous current of a switching current. A current signal is produced in response to a switching current of the magnetic device. By sampling the waveform of the current signal in response to the enabling of a switching signal, a first current signal and a second current signal are generated. A continuous current signal is produced according to the first current signal and the second current signal. The continuous current signal is corrected to the continuous current of the switching current.

摘要翻译： 本发明提供一种用于检测开关电流的连续电流的方法和装置。 响应于磁性装置的开关电流产生电流信号。 通过响应于使能切换信号对当前信号的波形进行采样，产生第一电流信号和第二电流信号。 根据第一电流信号和第二电流信号产生连续电流信号。 连续电流信号被校正为开关电流的连续电流。

公开(公告)号：US07405595B2

公开(公告)日：2008-07-29

申请号：US11281685

申请日：2005-11-16

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

IPC分类号： H03K19/094 ,  H03K19/0175

CPC分类号： H03K17/04123

摘要： A high-side transistor driver including a driver circuit for generating a driving signal to drive a high-side transistor is provided. A floating supply terminal provides a supply voltage to the driver circuit. A floating ground terminal is connected to a source of the high-side transistor. A bootstrap diode is coupled between the floating supply terminal and a voltage source. A capacitor is connected to the bootstrap diode and is coupled between the floating supply terminal and the floating ground terminal. A high-voltage transistor is used for switching off the driving signal and the high-side transistor in response to an input signal. A speed-up capacitor is coupled to the driver circuit for speeding up the driving signal. Furthermore, the positive feedback circuits in the driver circuit further accelerate the driving signal and save power for the driver circuit.

摘要翻译： 提供了包括用于产生用于驱动高侧晶体管的驱动信号的驱动电路的高侧晶体管驱动器。 浮动电源端子向驱动器电路提供电源电压。 浮动接地端子连接到高侧晶体管的源极。 自举二极管耦合在浮动电源端子和电压源之间。 电容器连接到自举二极管并耦合在浮动电源端子和浮动接地端子之间。 高压晶体管用于响应于输入信号来关断驱动信号和高侧晶体管。 加速电容器耦合到驱动器电路以加速驱动信号。 此外，驱动电路中的正反馈电路进一步加速驱动信号并节省驱动电路的功率。