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1. 发明申请

US20110063877A1 Synchronous rectifying circuit with primary-side swithching current detection for offline power converters 审中-公开
标题翻译：用于离线功率转换器的初级侧开关电流检测同步整流电路
公开(公告)号：US20110063877A1
公开(公告)日：2011-03-17
申请号：US12585472
申请日：2009-09-16
申请人： Ta-Yung Yang , Ying-Chieh Su , Yen-Ting Chen , Pei-Sheng Tsu
发明人： Ta-Yung Yang , Ying-Chieh Su , Yen-Ting Chen , Pei-Sheng Tsu
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： A synchronous rectifying circuit is provided for offline power converter. A pulse signal generator is utilized to generate a pulse signal in response to a switching current of the power transformer. An isolation device is coupled to the pulse signal generator for transferring the pulse signal through an isolation barrier of the power transformer. A synchronous rectifier includes a power switch and a control circuit. The power switch is coupled between the secondary side of the power transformer and the output of the power converter for the rectifying. The control circuit is operated to receive the pulse signal for turning on/off the power switch. The pulse signal is generated to turn on the power switch once the switching current is higher than a threshold.
摘要翻译：为离线电源转换器提供同步整流电路。利用脉冲信号发生器响应于电力变压器的开关电流产生脉冲信号。隔离装置耦合到脉冲信号发生器，用于通过电力变压器的隔离栅传递脉冲信号。同步整流器包括电源开关和控制电路。电源开关耦合在电源变压器的次级侧和功率转换器的输出端之间进行整流。操作控制电路接收用于打开/关闭电源开关的脉冲信号。产生脉冲信号以在开关电流高于阈值时接通电源开关。

2. 发明授权

US08094468B2 Control circuit having off-time modulation to operate power converter at quasi-resonance and in continuous current mode 有权
标题翻译：控制电路具有关闭时间调制以在准谐振和连续电流模式下操作功率转换器
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。

3. 发明授权

US08023289B2 Offline synchronous rectifier with causal circuit for resonant switching power converter 有权
标题翻译：用于谐振开关电源转换器的离线同步整流器
公开(公告)号：US08023289B2
公开(公告)日：2011-09-20
申请号：US12275174
申请日：2008-11-20
申请人： Ta-Yung Yang , Ying-Chieh Su , Chou-Sheng Wang , Tien-Chi Lin , Jhih-Da Hsu
发明人： Ta-Yung Yang , Ying-Chieh Su , Chou-Sheng Wang , Tien-Chi Lin , Jhih-Da Hsu
IPC分类号： H02M3/335 , H02M5/42
CPC分类号： H02M3/33592 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： A synchronous rectifier of a resonant switching power converter is provided to improve efficiency. The synchronous rectifier includes a power transistor and a diode connected to a transformer and an output of the resonant switching power converter for ratifications. A controller generates a drive signal to control the power transistor in response to an on signal and an off signal. A causal circuit is developed to generate the off signal in accordance with the on signal. The on signal is enabled once the diode is forward biased. The on signal is coupled to enable the drive signal for switching on the power transistor. The off signal is coupled to disable the drive signal for switching off the power transistor. The off signal is enabled before the on signal is disabled.
摘要翻译：提供谐振开关电源转换器的同步整流器以提高效率。同步整流器包括功率晶体管和连接到变压器的二极管以及用于批准的谐振开关功率转换器的输出。控制器响应于导通信号和关闭信号产生驱动信号以控制功率晶体管。开发因果电路以根据导通信号产生关断信号。二极管正向偏置后，导通信号使能。接通信号被耦合以使驱动信号能够接通功率晶体管。关断信号被耦合以禁用用于关断功率晶体管的驱动信号。关闭信号在禁用接通信号之前被使能。

4. 发明申请

US20100097104A1 CONTROL CIRCUIT HAVING OFF-TIME MODULATION TO OPERATE POWER CONVERTER AT QUASI-RESONANCE AND IN CONTINUOUS CURRENT MODE 有权
标题翻译：具有短时间调制功能的控制电路，用于在均衡和连续电流模式下操作电源转换器
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。

5. 发明申请

US20100232182A1 DUAL-SWITCHES FLYBACK POWER CONVERTER WITH SELF-EXCITED SUPPLY TO POWER THE HIGH-SIDE DRIVER 有权
标题翻译：双开关逆变电源转换器，自供电供电高边驱动器
公开(公告)号：US20100232182A1
公开(公告)日：2010-09-16
申请号：US12624565
申请日：2009-11-24
申请人： Ta-Yung Yang , Ying-Chieh Su , Jhih-Da Hsu
发明人： Ta-Yung Yang , Ying-Chieh Su , Jhih-Da Hsu
IPC分类号： H02M3/335
CPC分类号： H02M3/33569 , H02M2001/0006
摘要： An exemplary embodiment of a flyback power converter includes a transformer for power transfer, a high-side transistor, a low-side transistor, two diodes, a control circuit, and a high-side drive circuit. The high-side transistor and the low-side transistor are coupled to switch the transformer. The two diodes are coupled to said transformer to circulate energy of leakage inductance of the transformer to an input power rail of the power converter. The control circuit generates a switching signal coupled to control the high-side transistor and the low-side transistor. The high-side drive circuit is coupled to receive the switching signal for driving the high-side transistor. The transformer has an auxiliary winding generating a floating power to provide power supply for said high-side drive circuit.
摘要翻译：反激式功率转换器的示例性实施例包括用于功率传输的变压器，高侧晶体管，低侧晶体管，两个二极管，控制电路和高侧驱动电路。高侧晶体管和低侧晶体管被耦合以切换变压器。两个二极管耦合到所述变压器，以将变压器的漏电感的能量循环到功率转换器的输入电源轨。控制电路产生耦合以控制高侧晶体管和低侧晶体管的开关信号。高侧驱动电路被耦合以接收用于驱动高侧晶体管的开关信号。变压器具有产生浮动功率的辅助绕组，以为所述高侧驱动电路提供电源。

6. 发明授权

US08711583B2 Single-stage PFC converter with constant voltage and constant current 有权
标题翻译：具有恒定电压和恒定电流的单级PFC转换器
公开(公告)号：US08711583B2
公开(公告)日：2014-04-29
申请号：US13182291
申请日：2011-07-13
申请人： Ta-Yung Yang , Jhih-Da Hsu , Ying-Chieh Su , Li Lin
发明人： Ta-Yung Yang , Jhih-Da Hsu , Ying-Chieh Su , Li Lin
IPC分类号： H02M3/335
CPC分类号： H02M1/4258 , H02M2001/0006 , Y02B70/126
摘要： An exemplary embodiment of a power converter is provided. The power converter includes a transformer, a power device, a switching controller, and a capacitor. The power device is coupled to the transformer for switching the transformer to product output of the power converter. The switching controller receives a feedback signal for generating a switching signal coupled to drive the power device. An input circuit of the switching controller is coupled to the transformer to sample an input signal for generating the feedback signal, and the input signal is correlated to the output of the power converter. The capacitor is coupled to the switching controller to provide frequency compensation for a feedback loop of the power converter. Input of the power converter is without an electrolytic capacitor, and a maximum output current of the power converter is a constant current.
摘要翻译：提供了功率转换器的示例性实施例。功率转换器包括变压器，功率器件，开关控制器和电容器。功率器件耦合到变压器，用于将变压器切换到功率转换器的产品输出。开关控制器接收用于产生耦合以驱动功率器件的开关信号的反馈信号。开关控制器的输入电路耦合到变压器以对输入信号进行采样以产生反馈信号，并且输入信号与功率转换器的输出相关。电容器耦合到开关控制器以为功率转换器的反馈回路提供频率补偿。功率转换器的输入没有电解电容器，功率转换器的最大输出电流为恒定电流。

7. 发明授权

US08451632B2 Dual-Switches flyback power converter with self-excited supply to power the high-side driver 有权
标题翻译：双开关反激式电源转换器，具有自激电源为高端驱动器供电
公开(公告)号：US08451632B2
公开(公告)日：2013-05-28
申请号：US12624565
申请日：2009-11-24
申请人： Ta-Yung Yang , Ying-Chieh Su , Jhih-Da Hsu
发明人： Ta-Yung Yang , Ying-Chieh Su , Jhih-Da Hsu
IPC分类号： H02M3/335 , H02M7/537
CPC分类号： H02M3/33569 , H02M2001/0006
摘要： An exemplary embodiment of a flyback power converter includes a transformer for power transfer, a high-side transistor, a low-side transistor, two diodes, a control circuit, and a high-side drive circuit. The high-side transistor and the low-side transistor are coupled to switch the transformer. The two diodes are coupled to said transformer to circulate energy of leakage inductance of the transformer to an input power rail of the power converter. The control circuit generates a switching signal coupled to control the high-side transistor and the low-side transistor. The high-side drive circuit is coupled to receive the switching signal for driving the high-side transistor. The transformer has an auxiliary winding generating a floating power to provide power supply for said high-side drive circuit.
摘要翻译：反激式功率转换器的示例性实施例包括用于功率传输的变压器，高侧晶体管，低侧晶体管，两个二极管，控制电路和高侧驱动电路。高侧晶体管和低侧晶体管被耦合以切换变压器。两个二极管耦合到所述变压器，以将变压器的漏电感的能量循环到功率转换器的输入电源轨。控制电路产生耦合以控制高侧晶体管和低侧晶体管的开关信号。高侧驱动电路被耦合以接收用于驱动高侧晶体管的开关信号。变压器具有产生浮动功率的辅助绕组，以为所述高侧驱动电路提供电源。

8. 发明申请

US20100124079A1 OFFLINE SYNCHRONOUS RECTIFIER WITH CAUSAL CIRCUIT FOR RESONANT SWITCHING POWER CONVERTER 有权
标题翻译：用于谐振开关电源转换器的离线同步整流器
公开(公告)号：US20100124079A1
公开(公告)日：2010-05-20
申请号：US12275174
申请日：2008-11-20
申请人： Ta-Yung Yang , Ying-Chieh Su , Chou-Sheng Wang , Tien-Chi Lin , Jhih-Da Hsu
发明人： Ta-Yung Yang , Ying-Chieh Su , Chou-Sheng Wang , Tien-Chi Lin , Jhih-Da Hsu
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： A synchronous rectifier of a resonant switching power converter is provided to improve efficiency. The synchronous rectifier includes a power transistor and a diode connected to a transformer and an output of the resonant switching power converter for ratifications. A controller generates a drive signal to control the power transistor in response to an on signal and an off signal. A causal circuit is developed to generate the off signal in accordance with the on signal. The on signal is enabled once the diode is forward biased. The on signal is coupled to enable the drive signal for switching on the power transistor. The off signal is coupled to disable the drive signal for switching off the power transistor. The off signal is enabled before the on signal is disabled.
摘要翻译：提供谐振开关电源转换器的同步整流器以提高效率。同步整流器包括功率晶体管和连接到变压器的二极管以及用于批准的谐振开关功率转换器的输出。控制器响应于导通信号和关闭信号产生驱动信号以控制功率晶体管。开发因果电路以根据导通信号产生关断信号。二极管正向偏置后，导通信号使能。接通信号被耦合以使驱动信号能够接通功率晶体管。关断信号被耦合以禁用用于关断功率晶体管的驱动信号。关闭信号在禁用接通信号之前被使能。

9. 发明申请

US20120170330A1 SINGLE-STAGE PFC CONVERTER WITH CONSTANT VOLTAGE AND CONSTANT CURRENT 有权
标题翻译：具有恒定电压和恒定电流的单级PFC转换器
公开(公告)号：US20120170330A1
公开(公告)日：2012-07-05
申请号：US13182291
申请日：2011-07-13
申请人： Ta-Yung Yang , Jhih-Da Hsu , Ying-Chieh Su , Li Lin
发明人： Ta-Yung Yang , Jhih-Da Hsu , Ying-Chieh Su , Li Lin
IPC分类号： H02M7/04
CPC分类号： H02M1/4258 , H02M2001/0006 , Y02B70/126
摘要： An exemplary embodiment of a power converter is provided. The power converter includes a transformer, a power device, a switching controller, and a capacitor. The power device is coupled to the transformer for switching the transformer to product output of the power converter. The switching controller receives a feedback signal for generating a switching signal coupled to drive the power device. An input circuit of the switching controller is coupled to the transformer to sample an input signal for generating the feedback signal, and the input signal is correlated to the output of the power converter. The capacitor is coupled to the switching controller to provide frequency compensation for a feedback loop of the power converter. Input of the power converter is without an electrolytic capacitor, and a maximum output current of the power converter is a constant current.
摘要翻译：提供了功率转换器的示例性实施例。功率转换器包括变压器，功率器件，开关控制器和电容器。功率器件耦合到变压器，用于将变压器切换到功率转换器的产品输出。开关控制器接收用于产生耦合以驱动功率器件的开关信号的反馈信号。开关控制器的输入电路耦合到变压器以对输入信号进行采样以产生反馈信号，并且输入信号与功率转换器的输出相关。电容器耦合到开关控制器以为功率转换器的反馈回路提供频率补偿。功率转换器的输入没有电解电容器，功率转换器的最大输出电流为恒定电流。

10. 发明授权

US08767417B2 Dual switches flyback power converter with wide input voltage range 有权
标题翻译：双开关反激式电源转换器，输入电压范围宽
公开(公告)号：US08767417B2
公开(公告)日：2014-07-01
申请号：US13099595
申请日：2011-05-03
申请人： Chao-Chih Lin , Ta-Yung Yang , Ying-Chieh Su
发明人： Chao-Chih Lin , Ta-Yung Yang , Ying-Chieh Su
IPC分类号： H02M3/335
CPC分类号： H02M3/3353
摘要： A dual switches Flyback power converter with a wide input voltage range according to the present invention comprises an input diode and an energy-storage capacitor. The input diode can prevent the reflected voltage from the power transformer of the power converter to charge the electrolytic capacitor of the power converter. The energy-storage capacitor will store the reflected voltage and the energy of the leakage inductor of the power transformer. The energy stored in the energy-storage capacitor will be recycled to the output voltage of the power converter. Further, the input diode can be replaced by an input transistor to prevent the reflected voltage from the power transformer to charge the electrolytic capacitor.
摘要翻译：根据本发明的具有宽输入电压范围的双重开关反激式功率转换器包括输入二极管和储能电容器。输入二极管可以防止功率转换器的电源变压器的反射电压对功率转换器的电解电容器充电。储能电容器将存储电力变压器的反射电压和漏电感器的能量。存储在储能电容器中的能量将被再循环到功率转换器的输出电压。此外，输入二极管可以由输入晶体管代替，以防止来自电力变压器的反射电压对电解电容器充电。

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