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31. 发明授权

US07660136B2 Method and apparatus for synchronous rectifying of soft switching power converters 有权
标题翻译：软开关电源转换器的同步整流方法和装置
公开(公告)号：US07660136B2
公开(公告)日：2010-02-09
申请号：US11869143
申请日：2007-10-09
申请人： Ta-Yung Yang
发明人： Ta-Yung Yang
IPC分类号： H02M7/217
CPC分类号： H02M3/33592 , H02M1/08 , H02M3/3376 , Y02B70/1475
摘要： An apparatus for synchronous rectifying of a soft switching power converter is provided. An integrated synchronous rectifier includes a power transistor coupled between a transformer and the output of the soft switching power converter, and a controller receiving a pulse signal to switch on/off the power transistor. A switching control circuit generates the pulse signal in response to a current signal, and generates drive signals to switch the transformer in response to a switching signal. An isolation device is coupled to transfer the pulse signal between the switching control circuit and the integrated synchronous rectifier. The switching signal is used for regulating the power converter and the current signal is correlated to the switching current of the transformer.
摘要翻译：提供了一种用于软开关功率转换器的同步整流的装置。集成式同步整流器包括耦合在变压器和软开关功率转换器的输出端之间的功率晶体管，以及控制器，接收脉冲信号以接通/关断功率晶体管。开关控制电路响应于电流信号产生脉冲信号，并且响应于开关信号产生驱动信号以切换变压器。耦合隔离装置以在开关控制电路和集成式同步整流器之间传送脉冲信号。开关信号用于调节功率转换器，电流信号与变压器的开关电流相关。

32. 发明申请

US20100014324A1 OFFLINE SYNCHRONOUS RECTIFYING CIRCUIT WITH SENSE TRANSISTOR FOR RESONANT SWITCHING POWER CONVERTER 有权
标题翻译：用于谐振开关电源转换器的带有感应晶体管的离线同步整流电路
公开(公告)号：US20100014324A1
公开(公告)日：2010-01-21
申请号：US12176427
申请日：2008-07-21
申请人： Ta-Yung Yang , Chen-Hui Chan , Chou-Sheng Wang , Shih-Hung Hsieh
发明人： Ta-Yung Yang , Chen-Hui Chan , Chou-Sheng Wang , Shih-Hung Hsieh
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M2001/0009 , Y02B70/1433 , Y02B70/1475
摘要： A synchronous rectifying circuit of a resonant switching power converter is provided to improve the efficiency. The synchronous rectifying circuit includes a power transistor and a diode connected to a transformer and an output ground of the power converter for rectifying. A sense transistor is coupled to the power transistor for generating a mirror current correlated to a current of the power transistor. A controller generates a driving signal to control the power transistor in response to a switching-current signal. A current-sense device is coupled to the sense transistor for generating the switching-current signal in response to the mirror current. The controller enables the driving signal to turn on the power transistor once the diode is forwardly biased. The controller generates a reset signal to disable the driving signal and turn off the power transistor once the switching-current signal is lower than a threshold.
摘要翻译：提供谐振开关电源转换器的同步整流电路以提高效率。同步整流电路包括功率晶体管和连接到变压器的二极管和用于整流的功率转换器的输出地。感测晶体管耦合到功率晶体管，用于产生与功率晶体管的电流相关的反射镜电流。控制器响应于开关电流信号产生驱动信号以控制功率晶体管。电流感测装置耦合到感测晶体管，用于响应于反射镜电流产生开关电流信号。一旦二极管向前偏置，控制器使驱动信号接通功率晶体管。一旦开关电流信号低于阈值，控制器产生复位信号来禁止驱动信号并关断功率晶体管。

33. 发明授权

US07633183B2 Switching controller for power sharing of parallel power supplies 有权
标题翻译：并联电源功率共享开关控制器
公开(公告)号：US07633183B2
公开(公告)日：2009-12-15
申请号：US11675985
申请日：2007-02-16
申请人： Ta-Yung Yang
发明人： Ta-Yung Yang
IPC分类号： H02M11/00
CPC分类号： H02M3/285 , Y10T307/707 , Y10T307/74
摘要： A switching controller for power sharing of power supplies is disclosed. The switching controller includes an input circuit coupled to an input terminal to receive an input signal for generating a phase-shift signal, a first integration circuit coupled to the input circuit to generate a first integration signal in response to a pulse width of the input signal, and a control circuit coupled to the first integration circuit to generate a switching signal for switching the power supply, wherein the switching signal is enabled in response to the phase-shift signal, and a pulse width of the switching signal is determined in accordance with the first integration signal.
摘要翻译：公开了用于电力供应共享的开关控制器。开关控制器包括耦合到输入端以接收用于产生相移信号的输入信号的输入电路，耦合到输入电路的第一积分电路，以响应输入信号的脉冲宽度产生第一积分信号以及耦合到第一积分电路以产生用于切换电源的开关信号的控制电路，其中响应于相移信号而使得开关信号被使能，并且切换信号的脉冲宽度根据第一个积分信号。

34. 发明申请

US20080150503A1 Transistor Driver Circuit of Power Converter 有权
标题翻译：电源转换器晶体管驱动电路
公开(公告)号：US20080150503A1
公开(公告)日：2008-06-26
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： G05F1/56 , H03K17/687
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 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。

35. 发明授权

US07365997B2 Synchronous switching control circuit for power converters 有权
标题翻译：电源转换器同步开关控制电路
公开(公告)号：US07365997B2
公开(公告)日：2008-04-29
申请号：US11357044
申请日：2006-02-21
申请人： Cheng-Sung Chen , Ta-Yung Yang , Rui-Hong Lu
发明人： Cheng-Sung Chen , Ta-Yung Yang , Rui-Hong Lu
IPC分类号： H02M3/335
CPC分类号： H03L7/00 , H02M3/156 , H02M3/1563
摘要： The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is coupled to the first circuit to generate a second signal in accordance with the frequency of the first signal. Only when the first signal is operated in a specific frequency range, the synchronous operation is allowed. An oscillation circuit is connected to the first circuit and the second circuit to receive the first signal and the second signal to generate an oscillation signal. The oscillation signal is utilized to enable the switching signal of the power converter. The switching signal is thus synchronized with the input synchronous signal in response to the enable of the second signal. Otherwise, the switching signal will be free running.
摘要翻译：本发明提供一种用于可变开关频率功率转换器的同步开关控制电路。它包括响应于功率转换器的输入同步信号产生第一信号的第一电路。第二电路耦合到第一电路，以根据第一信号的频率产生第二信号。只有当第一个信号在特定频率范围内工作时，允许同步操作。振荡电路连接到第一电路和第二电路以接收第一信号和第二信号以产生振荡信号。振荡信号用于使能功率转换器的开关信号。因此，响应于第二信号的使能，切换信号与输入同步信号同步。否则，切换信号将自由运行。

36. 发明授权

US07349229B1 Causal sampling circuit for measuring reflected voltage and demagnetizing time of transformer 有权
标题翻译：用于测量变压器反射电压和退磁时间的因果采样电路
公开(公告)号：US07349229B1
公开(公告)日：2008-03-25
申请号：US11613884
申请日：2006-12-20
申请人： Ta-Yung Yang
发明人： Ta-Yung Yang
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M1/40 , H02M3/33515
摘要： A causal sampling circuit is developed to measure a reflected voltage and demagnetizing time of the transformer. It includes a signal-generation circuit to generate a sample signal for sampling the reflected voltage of the transformer. A ramp signal of the sampling circuit is generated in response to the demagnetizing of the transformer. A first reference signal is generated in accordance with the magnitude of the ramp signal after the transformer is fully demagnetized. A second reference signal is generated in response to the ramp signal and a bias signal. The sample signal is enabled in response to the demagnetizing of the transformer. The sample signal is disabled once the second reference signal is higher than the first reference signal. A sample-and-hold circuit is coupled to the transformer to sample the reflected voltage of the transformer in response to the sample signal.
摘要翻译：开发了一个因果采样电路来测量变压器的反射电压和去磁时间。它包括一个信号发生电路，用于产生用于对变压器的反射电压进行采样的采样信号。响应于变压器的消磁而产生采样电路的斜坡信号。在变压器完全退磁之后，根据斜坡信号的大小产生第一参考信号。响应于斜坡信号和偏置信号产生第二参考信号。响应于变压器的去磁使得采样信号被使能。一旦第二参考信号高于第一参考信号，采样信号被禁止。采样和保持电路耦合到变压器，以便根据采样信号对变压器的反射电压进行采样。

37. 发明申请

US20070285141A1 Start up circuit of power converter 有权
标题翻译：电源转换器启动电路
公开(公告)号：US20070285141A1
公开(公告)日：2007-12-13
申请号：US11448853
申请日：2006-06-08
申请人： Ta-Yung Yang , Chih-Feng Huang
发明人： Ta-Yung Yang , Chih-Feng Huang
IPC分类号： H03K3/02
CPC分类号： H03K3/355 , H02J7/0065 , H02M3/158 , Y10S323/901
摘要： A start up circuit of power converters is presented. It includes a first transistor, a resistive device, a second transistor, a third transistor and a diode. The first transistor is coupled to a voltage source. The third transistor is connected in serial with the first transistor to output a supply voltage to a control circuit of the power converter in response to the voltage source. The diode is connected from a transformer winding of the power converter to supply a further supply voltage to the control circuit of the power converter. The second transistor is coupled to control the first transistor and the third transistor in response to a control signal. The resistive device provides a bias voltage to turn on the first transistor and the third transistor when the second transistor is turned off. Once the second transistor is turned on, the third transistor is turned off and the first transistor is negative biased.
摘要翻译：介绍了电源转换器的启动电路。它包括第一晶体管，电阻器件，第二晶体管，第三晶体管和二极管。第一晶体管耦合到电压源。第三晶体管与第一晶体管串联连接，以响应于电压源向电力转换器的控制电路输出电源电压。二极管从功率转换器的变压器绕组连接，以向功率转换器的控制电路提供进一步的电源电压。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第三晶体管。当第二晶体管截止时，电阻器件提供偏置电压以接通第一晶体管和第三晶体管。一旦第二晶体管导通，第三晶体管截止，第一晶体管被负偏压。

38. 发明授权

US07259525B2 High efficiency switching LED driver 有权
标题翻译：高效率切换LED驱动器
公开(公告)号：US07259525B2
公开(公告)日：2007-08-21
申请号：US11265290
申请日：2005-11-03
申请人： Ta-Yung Yang
发明人： Ta-Yung Yang
IPC分类号： G05F1/00
CPC分类号： H05B33/0815 , H05B33/0848
摘要： The present invention provides a LED driver for control the brightness of the LED. An inductor and a switch are connected in serial with the LED for control the current of the LED. A control circuit is developed to generate a control signal for switching the switch in response the LED current. A diode is parallel coupled to the inductor for freewheeling the energy of the inductor through the LED.
摘要翻译：本发明提供一种用于控制LED的亮度的LED驱动器。电感和开关与LED串联连接，用于控制LED的电流。开发控制电路以响应于LED电流产生用于切换开关的控制信号。二极管并联耦合到电感器，用于通过LED续流电感的能量。

39. 发明申请

US20070171685A1 Control circuit including adaptive bias for transformer voltage detection of a power converter 有权
标题翻译：控制电路包括用于变压器变压器电压检测的自适应偏置
公开(公告)号：US20070171685A1
公开(公告)日：2007-07-26
申请号：US11337582
申请日：2006-01-24
申请人： Ta-Yung Yang
发明人： Ta-Yung Yang
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A control circuit is developed to detect a flyback voltage of a transformer of a power converter. The control circuit comprises a switch, a detection circuit and a switching circuit. The switch is coupled to the transformer for switching the transformer. The detection circuit coupled the transformer to detect the flyback voltage for generating a first signal. The switching circuit generates a control signal to control the switch and regulate the output of the power converter in response to the first signal. Because the pulse width of the flyback voltage is short at light load, the detection circuit is designed to produce a bias signal to help the flyback voltage detection. The bias signal is increased in response to the decrease of the discharge time of the transformer. Besides, the switching circuit generates a blanking signal in response to the control signal. The blanking signal ensures a minimum pulse width of the flyback voltage.
摘要翻译：开发了控制电路以检测功率转换器的变压器的回扫电压。控制电路包括开关，检测电路和开关电路。开关耦合到变压器以切换变压器。检测电路耦合变压器以检测用于产生第一信号的回扫电压。开关电路产生控制信号以控制开关并响应于第一信号调节功率转换器的输出。因为反激电压的脉冲宽度在轻负载时短，所以检测电路被设计成产生偏置信号以帮助反激电压检测。响应于变压器的放电时间的减小，偏置信号增加。此外，开关电路响应于控制信号产生消隐信号。消隐信号确保反激电压的最小脉冲宽度。

40. 发明申请

US20070121352A1 Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converter 有权
标题翻译：具有谷值电压检测器的开关控制电路以实现谐振功率转换器的软开关
公开(公告)号：US20070121352A1
公开(公告)日：2007-05-31
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。

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