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1. 发明授权

US08072787B2 Synchronous rectifying for soft switching power converters 有权
标题翻译：软开关电源转换器的同步整流
公开(公告)号：US08072787B2
公开(公告)日：2011-12-06
申请号：US11924761
申请日：2007-10-26
申请人： Ta-Yung Yang , Wei-Li Hsu , Chou-Sheng Wang
发明人： Ta-Yung Yang , Wei-Li Hsu , Chou-Sheng Wang
IPC分类号： H02M7/217
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： An synchronous rectifying apparatus or synchronous rectifying circuit of a soft switching power converter is provided to improve the efficiency. The integrated synchronous rectifying circuit includes: a power transistor connected from a transformer to the output of the power converter for rectifying; a controller having a latch circuit generates a drive signal to control the power transistor in response to a switching signal generated by a winding of the transformer in response to the switching of the transformer. The controller turns off the power transistor when the switching signal is lower than a low-threshold. The power transistor is turned on when the switching signal is higher than a high-threshold. Furthermore, a maximum-on-time circuit provided in the controller is applied to generate a maximum-on-time signal for limiting the maximum on time of the power transistor.
摘要翻译：提供了一种软开关电源转换器的同步整流装置或同步整流电路，以提高效率。集成同步整流电路包括：从变压器连接到功率转换器的输出端的功率晶体管，用于整流; 具有锁存电路的控制器响应于变压器的绕组响应于变压器的切换而产生的开关信号而产生驱动信号以控制功率晶体管。当开关信号低于低阈值时，控制器关闭功率晶体管。当开关信号高于高阈值时，功率晶体管导通。此外，施加设置在控制器中的最大导通时间电路以产生用于限制功率晶体管的最大导通时间的最大导通时间信号。

2. 发明授权

US08004862B2 Offline synchronous rectifying circuit with current transformer for soft switching power converters 有权
标题翻译：带电流互感器的离线同步整流电路，用于软开关电源转换器
公开(公告)号：US08004862B2
公开(公告)日：2011-08-23
申请号：US12036997
申请日：2008-02-25
申请人： Ta-Yung Yang , Chou Sheng Wang , Wei Li Hsu
发明人： Ta-Yung Yang , Chou Sheng Wang , Wei Li Hsu
IPC分类号： H02M3/335 , H02M5/42
CPC分类号： H02M3/33592 , Y02B70/1433 , Y02B70/1475
摘要： A synchronous rectifying circuit of soft switching power converter is provided to improve the efficiency. The integrated synchronous rectifier includes a power transistor connected from a transformer to the output of the power converter for rectifying. A controller having a latch circuit generates a drive signal to control the power transistor in response to a switching-current signal. A current transformer generates the switching-current signal in response to the switching current of the transformer. The controller turns off the power transistor when the switching-current signal is lower than a second threshold. The power transistor is turned on once the switching-current signal is higher than a first threshold. Furthermore, a pulse-width detection circuit generates a pulse signal coupled to disable the drive signal and turn off the power transistor.
摘要翻译：提供了软开关电源转换器的同步整流电路，以提高效率。集成同步整流器包括从变压器连接到功率转换器的输出端的功率晶体管，用于整流。具有锁存电路的控制器产生驱动信号以响应于开关电流信号来控制功率晶体管。电流互感器响应于变压器的开关电流产生开关电流信号。当开关电流信号低于第二阈值时，控制器关闭功率晶体管。一旦开关电流信号高于第一阈值，功率晶体管就导通。此外，脉冲宽度检测电路产生耦合以禁用驱动信号并关断功率晶体管的脉冲信号。

3. 发明授权

US08154888B2 Offline synchronous rectifier circuit with turned-on arbiter and phase-lock for switching power converters 有权
标题翻译：具有开启电源转换器的开启仲裁器和相位锁定的离线同步整流电路
公开(公告)号：US08154888B2
公开(公告)日：2012-04-10
申请号：US12348335
申请日：2009-01-05
申请人： Ta-Yung Yang , Chou-Sheng Wang , Pei-Sheng Tsu
发明人： Ta-Yung Yang , Chou-Sheng Wang , Pei-Sheng Tsu
IPC分类号： H02M3/335 , H02H7/122
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： A synchronous rectifier circuit of a switching power converter is provided and includes first and second power transistors and first and second diodes connected to a transformer and an output of the power converter for rectifying. An arbiter circuit generates a lock signal to prevent the second power transistor from being turned on when the first power transistor is turned on. A controller generates a drive signal to control the first power transistor according to an on signal and an off signal. A phase-lock circuit generates the off signal according to the on signal. The on signal is enabled once the first diode is forward biased. The one signal enables the drive signal for turning on the first power transistor. The off signal disables the drive signal for turning off the first power transistor. The off signal is enabled before the disabling of the on signal.
摘要翻译：提供了一种开关电源转换器的同步整流电路，包括第一和第二功率晶体管以及连接到变压器的第一和第二二极管以及用于整流的功率转换器的输出。仲裁器电路产生锁定信号，以防止当第一功率晶体管导通时第二功率晶体管导通。控制器根据接通信号和截止信号产生驱动信号以控制第一功率晶体管。锁相电路根据接通信号产生关断信号。第一个二极管正向偏置后，导通信号被使能。一个信号使得驱动信号能够接通第一功率晶体管。关闭信号禁用用于关闭第一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

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。

5. 发明授权

US09077258B2 Regulation circuit associated with synchronous rectifier providing cable compensation for the power converter and method thereof 有权
标题翻译：与同步整流器相关联的调节电路为功率转换器提供电缆补偿及其方法
公开(公告)号：US09077258B2
公开(公告)日：2015-07-07
申请号：US13551705
申请日：2012-07-18
申请人： Ta-Yung Yang , Chou-Sheng Wang
发明人： Ta-Yung Yang , Chou-Sheng Wang
IPC分类号： H02M3/335 , H02M1/00
CPC分类号： G05F1/575 , H02M3/33592 , H02M2001/0025 , Y02B70/1475
摘要： A regulation circuit of a power converter for cable compensation according to the present invention comprises a signal generator generating a compensation signal in accordance with a synchronous rectifying signal. An error amplifier has a reference signal for generating a feedback signal in accordance with an output voltage of the power converter. The compensation signal is coupled to program the reference signal. The feedback signal is coupled to generate a switching signal for regulating an output of the power converter. The regulation circuit of the present invention compensates the output voltage without a shunt resistor to sense the output current of the power converter for reducing power loss.
摘要翻译：根据本发明的用于电缆补偿的功率转换器的调节电路包括根据同步整流信号产生补偿信号的信号发生器。误差放大器具有用于根据功率转换器的输出电压产生反馈信号的参考信号。该补偿信号被耦合以对参考信号进行编程。反馈信号被耦合以产生用于调节功率转换器的输出的开关信号。本发明的调节电路在没有分流电阻的情况下补偿输出电压，以感测功率转换器的输出电流以降低功率损耗。

6. 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。

7. 发明授权

US08649191B2 Synchronous rectifier having phase lock circuit coupled to feedback loop for resonant power converters 有权
标题翻译：同步整流器具有耦合到用于谐振功率转换器的反馈回路的锁相电路
公开(公告)号：US08649191B2
公开(公告)日：2014-02-11
申请号：US12579462
申请日：2009-10-15
申请人： Ta-Yung Yang , Chou-Sheng Wang , Rui-Hong Lu
发明人： Ta-Yung Yang , Chou-Sheng Wang , Rui-Hong Lu
IPC分类号： H02M3/335
CPC分类号： H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A synchronous rectifier for a switching power converter is provided and includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for the rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a phase-lock circuit. The phase-lock circuit generates an off signal to switch off the power transistor in response to a pulse width of the drive signal. The pulse width of the drive signal is shorter than a turned-on period of the diode. The phase-lock circuit further reduces the pulse width of the drive signal in response to a feedback signal. The feedback signal is correlated to an output load of the power converter.
摘要翻译：提供了一种用于开关功率转换器的同步整流器，其包括功率晶体管，二极管和控制电路。功率晶体管和二极管耦合到变压器和用于整流的功率转换器的输出端。一旦二极管正向偏置，控制电路产生驱动信号来接通功率晶体管。控制电路包括锁相电路。锁相电路响应于驱动信号的脉冲宽度产生截止信号以关断功率晶体管。驱动信号的脉冲宽度比二极管的导通时间短。相位锁定电路还响应于反馈信号进一步减小驱动信号的脉冲宽度。反馈信号与功率转换器的输出负载相关。

8. 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。

9. 发明申请

US20100201334A1 SYNCHRONOUS RECTIFIER HAVING PHASE LOCK CIRCUIT COUPLED TO FEEDBACK LOOP FOR RESONANT POWER CONVERTERS 有权
标题翻译：具有相位锁定电路的同步整流器与谐波电源转换器的反馈环路耦合
公开(公告)号：US20100201334A1
公开(公告)日：2010-08-12
申请号：US12579462
申请日：2009-10-15
申请人： Ta-Yung Yang , Chou-Sheng Wang , Rui-Hong Lu
发明人： Ta-Yung Yang , Chou-Sheng Wang , Rui-Hong Lu
IPC分类号： G05F1/10
CPC分类号： H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A synchronous rectifier for a switching power converter is provided and includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for the rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a phase-lock circuit. The phase-lock circuit generates an off signal to switch off the power transistor in response to a pulse width of the drive signal. The pulse width of the drive signal is shorter than a turned-on period of the diode. The phase-lock circuit further reduces the pulse width of the drive signal in response to a feedback signal. The feedback signal is correlated to an output load of the power converter.
摘要翻译：提供了一种用于开关功率转换器的同步整流器，其包括功率晶体管，二极管和控制电路。功率晶体管和二极管耦合到变压器和用于整流的功率转换器的输出端。一旦二极管正向偏置，控制电路产生驱动信号来接通功率晶体管。控制电路包括锁相电路。锁相电路响应于驱动信号的脉冲宽度产生截止信号以关断功率晶体管。驱动信号的脉冲宽度比二极管的导通时间短。相位锁定电路还响应于反馈信号进一步减小驱动信号的脉冲宽度。反馈信号与功率转换器的输出负载相关。

10. 发明授权

US09093918B2 Control circuit for offline power converter without input capacitor 有权
标题翻译：无输入电容的离线电源转换器的控制电路
公开(公告)号：US09093918B2
公开(公告)日：2015-07-28
申请号：US13604339
申请日：2012-09-05
申请人： Ta-Yung Yang , Chih-Hsien Hsieh , Jung-Sheng Chen
发明人： Ta-Yung Yang , Chih-Hsien Hsieh , Jung-Sheng Chen
IPC分类号： H02M1/42 , H02M3/335
CPC分类号： H02M1/4258 , H02M3/33507 , Y02B70/126
摘要： The present invention provides a control circuit for a power converter. The control circuit includes a switching circuit, an input-voltage detection circuit and a current-limit threshold. The switching circuit generates a switching signal coupled to switch a transformer of the power converter for regulating an output of the power converter in response to a feedback signal. The input-voltage detection circuit generates a control signal when an input voltage of the power converter is lower than a low-input threshold. The feedback signal is generated in response to the output of the power converter. A maximum duty of the switching signal is increased in response to the control signal. The current-limit threshold is for limiting a maximum value of a switching current flowing through the transformer. The current-limit threshold is increased in response to the control signal. An input of the power converter doesn't connect with electrolytic bulk capacitors.
摘要翻译：本发明提供了一种用于功率转换器的控制电路。控制电路包括开关电路，输入电压检测电路和限流阈值。开关电路产生耦合以切换功率转换器的变压器的开关信号，用于响应于反馈信号调节功率转换器的输出。当电力转换器的输入电压低于低输入阈值时，输入电压检测电路产生控制信号。响应于功率转换器的输出产生反馈信号。开关信号的最大占空比响应于控制信号而增加。限流阈值用于限制流过变压器的开关电流的最大值。响应于控制信号增加限流阈值。电源转换器的输入不与电解大容量电容器连接。

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