公开(公告)号：US20110255309A1

公开(公告)日：2011-10-20

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：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：US07561447B2

公开(公告)日：2009-07-14

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： H02M3/335

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：US07518416B2

公开(公告)日：2009-04-14

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： H03B1/00 ,  H03K3/00

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：US20080048633A1

公开(公告)日：2008-02-28

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： G05F5/00

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。