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151. 发明申请

US20080100277A1 SWITCHING CONTROLLER HAVING SYNCHRONOUS INPUT FOR THE SYNCHRONIZATION OF POWER CONVERTERS 有权
标题翻译：具有同步输入功率转换器同步的开关控制器
公开(公告)号：US20080100277A1
公开(公告)日：2008-05-01
申请号：US11554601
申请日：2006-10-31
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： B23K11/24
CPC分类号： H02M3/33507 , H02M2001/008 , Y10T307/406
摘要： A switching control circuit having a synchronous input for the synchronization of power converters is provided. It includes a synchronous input circuit for receiving a synchronous input signal. An oscillation circuit is connected to the synchronous input circuit for generating an oscillation signal in response to the synchronous input signal. A signal converter is coupled to receive a feedback signal of the power converter for modulating the oscillation signal in response to the feedback signal for achieving power savings. The oscillation signal is connected for enabling the switching signal of the power converter. The switching signal can be synchronized with the synchronous input signal immediately after the synchronous input signal is inputted. Otherwise, the switching signal will be running free.
摘要翻译：提供了具有用于功率转换器的同步的同步输入的开关控制电路。它包括用于接收同步输入信号的同步输入电路。振荡电路连接到同步输入电路，用于响应于同步输入信号产生振荡信号。耦合信号转换器以接收功率转换器的反馈信号，以响应于用于实现功率节省的反馈信号来调制振荡信号。连接振荡信号以使能电力转换器的开关信号。切换信号可以在输入同步输入信号之后立即与同步输入信号同步。否则，切换信号将自由运行。

152. 发明授权

US07352595B2 Primary-side controlled switching regulator 有权
标题翻译：初级侧受控开关调节器
公开(公告)号：US07352595B2
公开(公告)日：2008-04-01
申请号：US11270867
申请日：2005-11-08
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。

153. 发明申请

US20080043503A1 METHOD AND APPARATUS FOR DETECTING DEMAGNETIZING TIME OF MAGNETIC DEVICE 有权
标题翻译：用于检测磁性装置的去磁时间的方法和装置
公开(公告)号：US20080043503A1
公开(公告)日：2008-02-21
申请号：US11464692
申请日：2006-08-15
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： H02M3/24
CPC分类号： H02M3/33507 , G01R33/1215
摘要： A detection circuit for detecting the demagnetizing time of a magnetic device is provided. An input circuit is coupled to the magnetic device for detecting a magnetizing voltage and a demagnetizing voltage of the magnetic device. A control circuit is coupled to the input circuit for generating a demagnetizing-time signal in response to the magnetizing voltage, the demagnetizing voltage, and a magnetizing time. The magnetizing time is correlated to the enable period of the magnetizing voltage. The demagnetizing time of the magnetic device is represented by the demagnetizing-time signal.
摘要翻译：提供了一种用于检测磁性装置的消磁时间的检测电路。输入电路耦合到磁性装置，用于检测磁性装置的磁化电压和去磁电压。控制电路耦合到输入电路，用于响应于磁化电压，去磁电压和磁化时间产生去磁时信号。磁化时间与励磁电压的使能期相关。磁性装置的去磁时间由去磁时信号表示。

154. 发明申请

US20080037302A1 SYNCHRONOUS RECTIFICATION CIRCUIT FOR POWER CONVERTERS 有权
标题翻译：用于电力转换器的同步整流电路
公开(公告)号：US20080037302A1
公开(公告)日：2008-02-14
申请号：US11464078
申请日：2006-08-11
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： H02M7/217
CPC分类号： H02M7/217 , H02M3/33592 , Y02B70/1433 , Y02B70/1441 , Y02B70/1475
摘要： A synchronous rectification circuit for power converters operable under fixed and/or variable frequencies where no current sense circuit or phase-lock circuit are needed is provided. It has a power switch coupled to a transformer for the rectification. A signal-generation circuit is used for generating a control signal in response to a magnetized voltage of the transformer, a demagnetized voltage of the transformer, and a magnetization period of the transformer. The control signal is coupled to turn on the power switch. The enable period of the control signal is correlated to a demagnetization period of the transformer.
摘要翻译：提供了在固定和/或可变频率下可操作的电力转换器的同步整流电路，其中不需要电流检测电路或锁相电路。它具有耦合到用于整流的变压器的电源开关。信号发生电路用于响应于变压器的磁化电压，变压器的退磁电压和变压器的磁化周期产生控制信号。控制信号被耦合以打开电源开关。控制信号的使能期间与变压器的退磁期相关。

155. 发明申请

US20080037289A1 MULTI-CHANNELS POWER CONVERTER WITH SWITCHING FREQUENCY MODULATION CIRCUIT FOR POWER SAVING 失效
标题翻译：具有切换频率调制电路的多通道功率转换器
公开(公告)号：US20080037289A1
公开(公告)日：2008-02-14
申请号：US11463898
申请日：2006-08-11
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： H02K47/22
CPC分类号： H02M3/33561 , H02M2001/0032 , Y02B70/16
摘要： The present invention provides a control circuit for multi-channels power converter to save power at light load. The control circuit comprises a modulation circuit and an oscillation circuit to modulate the switching frequency of switching signals for power saving. The modulation circuit generates a modulation signal in response to a first feedback signal and a second feedback signal. The oscillation circuit is coupled to the modulation circuit to control a switching frequency of switching signals in accordance with the modulation signal. The switching frequency of the first switching signal can be linearly decreased in response to the decrease of the load when the second switching signal is enabled. The first switching signal can be busted for further power saving once the second switching signal is disabled.
摘要翻译：本发明提供一种用于多通道功率转换器的控制电路，用于在轻负载时节省功率。控制电路包括调制电路和振荡电路，以调制切换信号的开关频率以节省功率。调制电路响应于第一反馈信号和第二反馈信号产生调制信号。振荡电路耦合到调制电路，以根据调制信号控制开关信号的开关频率。当第二切换信号被使能时，响应于负载的减小，第一开关信号的开关频率可以线性地减小。一旦禁用第二个开关信号，第一个开关信号可以被中断以进一步省电。

156. 发明授权

US07310251B2 Control circuit having two-level under voltage lockout threshold to improve the protection of power supply 有权
公开(公告)号：US07310251B2
公开(公告)日：2007-12-18
申请号：US11360445
申请日：2006-02-24
申请人： Ta-yung Yang , Wei-Hsuan Huang
发明人： Ta-yung Yang , Wei-Hsuan Huang
IPC分类号： H02H7/122 , H02M3/335 , G05F1/40
CPC分类号： H02H7/1222 , H02H3/243
摘要： The invention presents a switching power control circuit including two levels of under voltage lockout to improve the protection of the power supply. An input terminal of control circuit is connected to a supplied capacitor to supply the power of the control circuit. The supplied capacitor is charged through a start resistor for the start-up. Once the input voltage reaches a start-up voltage, the control circuit will start the operation. After that, the power is further supplied from a transformer of the power supply. If a fault condition is occurred, the switching of the control circuit will be stop and the supplied capacitor will be discharged. When the input voltage is discharged lower than a first under-voltage lockout threshold, the circuits of control circuit are shut down to consume lower power. Furthermore, once the input voltage is discharged lower than a second under-voltage lockout threshold, the control circuit will enable the start-up again. During the discharge period from the first under-voltage lockout threshold to second under-voltage lockout threshold, the switching of the control circuit is off and the discharge time is increased which reduces of the switching duty cycle and improves the protection of the power supply.

157. 发明申请

US20070247879A1 Start-up circuit with feedforward compensation for power converters 有权
标题翻译：启动电路，具有电源转换器的前馈补偿
公开(公告)号：US20070247879A1
公开(公告)日：2007-10-25
申请号：US11406309
申请日：2006-04-19
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： H02M1/00
CPC分类号： H02M1/36 , H02M2001/0019 , Y10S323/908
摘要： A bleeding resistor is required to discharge EMI filter of the power converter for the safety purpose. In order to save power and reduce device count, the present invention further uses this bleeding resistor for both start-up and feedforward compensation. It includes an input terminal for connecting the bleeding resistor. A voltage divider is connected to the input terminal. A sample-and-hold circuit samples and holds a voltage signal from the voltage divider. After that, a low-pass filter is connected to the sample-and-hold circuit to generate an offset signal in accordance with the voltage signal. The offset signal is connected to a limit circuit to generate a limit signal that limits the switching current of the power converter.
摘要翻译：为了安全起见，需要使用出血电阻来对功率变换器的EMI滤波器进行放电。为了节约功率并减少器件数量，本发明进一步使用该出血电阻用于起动和前馈补偿。它包括用于连接出血电阻的输入端子。一个分压器连接到输入端。采样保持电路采样并保持分压器的电压信号。之后，将低通滤波器连接到采样保持电路，以根据电压信号产生偏移信号。偏移信号连接到限制电路以产生限制功率转换器的开关电流的限制信号。

158. 发明申请

US20070247225A1 Switching circuit of power converter having voltage-clipping device to improve efficiency 有权
标题翻译：具有电压钳位装置的功率转换器的开关电路，以提高效率
公开(公告)号：US20070247225A1
公开(公告)日：2007-10-25
申请号：US11407537
申请日：2006-04-19
申请人： Chih-Feng Huang , Chiu-Chih Chiang , You-Kuo Wu , Wei-Hsuan Huang , Ta-yung Yang
发明人： Chih-Feng Huang , Chiu-Chih Chiang , You-Kuo Wu , Wei-Hsuan Huang , Ta-yung Yang
IPC分类号： H03F1/36
CPC分类号： H02M1/36 , H02M2001/0006
摘要： A switching circuit for power converters is presented. It includes a voltage-clipping device, a resistive device, a first transistor and a second transistor. The voltage-clipping device is coupled to an input voltage. The first transistor is connected in series with the voltage-clipping device for switching the input voltage. The second transistor is coupled to control the first transistor and the voltage-clipping device in response to a control signal. The resistive device provides a bias voltage to turn on the voltage-clipping device and the first transistor when the second transistor is turned off. Once the second transistor is turned on, the first transistor is turned off and the voltage-clipping device is negatively biased. The voltage-clipping device is developed to clamp a maximum voltage for the first transistor.
摘要翻译：提出了一种电源转换器的开关电路。它包括电压限幅装置，电阻装置，第一晶体管和第二晶体管。电压限幅装置耦合到输入电压。第一晶体管与用于切换输入电压的电压限幅装置串联连接。第二晶体管被耦合以响应于控制信号来控制第一晶体管和电压限幅装置。当第二晶体管截止时，电阻器件提供偏置电压以接通压限器件和第一晶体管。一旦第二晶体管导通，第一晶体管被截止并且电压限幅器件被负偏置。钳位装置被开发以钳位第一晶体管的最大电压。

159. 发明申请

US20070247128A1 Method and apparatus for predicting discharge time of magnetic device for power converter 有权
标题翻译：用于预测功率转换器磁性装置放电时间的方法和装置
公开(公告)号：US20070247128A1
公开(公告)日：2007-10-25
申请号：US11407439
申请日：2006-04-19
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： G05F1/00
CPC分类号： H02M3/1588 , H02M2001/0022 , Y02B70/1466
摘要： A method and apparatus for predicting the discharge time of magnetic device are provided. A switching circuit generates a switching signal and an auxiliary signal. The switching signal is used to regulate the switching regulator. The auxiliary signal is used to control the synchronous rectifier. An evaluation circuit generates a timing signal in response to an input signal and the switching signal. The input signal is correlated to the input voltage of the switching regulator. The timing signal is formed for turning off the synchronous rectifier for preventing a reverse current under light load and no load conditions.
摘要翻译：提供了一种用于预测磁性装置的放电时间的方法和装置。开关电路产生开关信号和辅助信号。开关信号用于调节开关稳压器。辅助信号用于控制同步整流器。评估电路响应于输入信号和开关信号产生定时信号。输入信号与开关稳压器的输入电压相关。定时信号被形成用于在轻负载和无负载条件下关闭同步整流器以防止反向电流。

160. 发明授权

US07286376B2 Soft-switching power converter having power saving circuit for light load operations 有权
公开(公告)号：US07286376B2
公开(公告)日：2007-10-23
申请号：US11285964
申请日：2005-11-23
申请人： Ta-yung Yang
发明人： Ta-yung Yang
IPC分类号： H02M3/335 , H02M3/22
CPC分类号： H02M3/33569
摘要： A soft switching power converter includes a first switch for switching a transformer to transfer energy. A second switch is equipped to switch energy in a capacitor to the transformer to achieve soft switching for the next switching cycle. A control circuit is coupled to an output of the power converter for generating a first signal and a second signal in response to a feedback signal for regulating the output of the power converter. A first delay time is generated after the first switch is turned off and before the second signal is on. A second delay time is generated after the second switch is turned off and before the first signal is on. The second delay time is increased corresponding to a decrement of the feedback signal under light load conditions.

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