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1. 发明授权

US08432109B2 Method and apparatus for a LED driver with high power factor 有权
标题翻译：具有高功率因数的LED驱动器的方法和装置
公开(公告)号：US08432109B2
公开(公告)日：2013-04-30
申请号：US13073095
申请日：2011-03-28
申请人： Ta-Yung Yang , Li Lin , Chih-Hsien Hsieh , Chuh-Ching Li , Chi-Yin Lo , Kuo-Hsiem Huang
发明人： Ta-Yung Yang , Li Lin , Chih-Hsien Hsieh , Chuh-Ching Li , Chi-Yin Lo , Kuo-Hsiem Huang
IPC分类号： H05B37/02
CPC分类号： H05B33/0815
摘要： A control circuit of a LED driver according to the present invention comprises an output circuit, an input circuit and an input-voltage detection circuit. The output circuit generates a switching signal to produce an output current for driving at least one LED in response to a feedback signal. The switching signal is coupled to switch a transformer. The input circuit samples an input signal for generating the feedback signal. The input signal is correlated to the output current of the LED driver. The input-voltage detection circuit generates an input-voltage signal in response to an input voltage of the LED driver. The input circuit will not sample the input signal when the input-voltage signal is lower than a threshold. The control circuit can eliminate the need of the input capacitor for improving the reliability of the LED driver.
摘要翻译：根据本发明的LED驱动器的控制电路包括输出电路，输入电路和输入电压检测电路。输出电路产生开关信号以产生用于响应于反馈信号驱动至少一个LED的输出电流。开关信号被耦合以切换变压器。输入电路对输入信号进行采样以产生反馈信号。输入信号与LED驱动器的输出电流相关。输入电压检测电路根据LED驱动器的输入电压产生输入电压信号。当输入电压信号低于阈值时，输入电路不会对输入信号进行采样。控制电路可以消除输入电容器的需要，提高LED驱动器的可靠性。

2. 发明授权

US07965528B2 Method and apparatus for measuring the switching current of power converter operated at continuous current mode 有权
标题翻译：用于测量在连续电流模式下工作的功率转换器的开关电流的方法和装置
公开(公告)号：US07965528B2
公开(公告)日：2011-06-21
申请号：US12255089
申请日：2008-10-21
申请人： Ta-Yung Yang , Chuh-Ching Li , Sheng-Fu Hsu , Li Lin , Jung-Sheng Chen
发明人： Ta-Yung Yang , Chuh-Ching Li , Sheng-Fu Hsu , Li Lin , Jung-Sheng Chen
IPC分类号： H02M3/24 , H02M3/335 , H02M7/44
CPC分类号： H02M3/33507 , G01R19/0092 , G01R31/40
摘要： An apparatus for detecting a switching current of the power converter, wherein the apparatus includes a signal generation circuit, a sample-and-hold circuit, and a calculating circuit. The signal generation circuit generates a sample signal in accordance with the pulse width of a switching signal. The sample-and-hold circuit is coupled to receive the sample signal and switching current signal for generating a first current signal and a second current signal. The calculating circuit is coupled to receive the first current signal and the second current signal for generating output signals. The switching signal is used for switching the magnetic device of the power converter, and the switching current signal is correlated to the switching current of the power converter; the output signals are correlated to the value of the switching current of the power converter.
摘要翻译：一种用于检测功率转换器的开关电流的装置，其中所述装置包括信号产生电路，采样保持电路和计算电路。信号生成电路根据切换信号的脉冲宽度生成采样信号。采样和保持电路被耦合以接收采样信号和开关电流信号，用于产生第一电流信号和第二电流信号。计算电路被耦合以接收第一电流信号和第二电流信号以产生输出信号。开关信号用于切换功率转换器的磁性装置，开关电流信号与功率转换器的开关电流相关; 输出信号与功率转换器的开关电流的值相关。

3. 发明申请

US20110255309A1 High-Speed Reflected Signal Detection for Primary-Side Controlled Power Converters 有权
标题翻译：一次侧控制电源转换器的高速反射信号检测
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。

4. 发明授权

US08854841B2 High-speed reflected signal detection for primary-side controlled power converters 有权
标题翻译：用于初级侧受控电源转换器的高速反射信号检测
公开(公告)号：US08854841B2
公开(公告)日：2014-10-07
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。

5. 发明授权

US08643297B2 Control circuit and control method for dimming LED lighting circuit 有权
标题翻译： LED照明电路调光控制电路及控制方法
公开(公告)号：US08643297B2
公开(公告)日：2014-02-04
申请号：US13223660
申请日：2011-09-01
申请人： Ta-Yung Yang , Li Lin , Chi-Yin Lo , Kuo-Hsien Huang , Hung-Chun Chen
发明人： Ta-Yung Yang , Li Lin , Chi-Yin Lo , Kuo-Hsien Huang , Hung-Chun Chen
IPC分类号： H05B37/02
CPC分类号： H05B33/0815
摘要： The present invention provides a control circuit for dimming LED lighting. The control circuit comprises a voltage divider, a controller and an adaptive bleeder. The voltage divider receives an input voltage from an input terminal to generate a dimming signal. The controller generates a switching signal in response to the dimming signal. The controller further generates a control signal in response to the input voltage. The adaptive bleeder receives the control signal and draws a bleeder current from the input terminal in response to the control signal.
摘要翻译：本发明提供一种用于调光LED照明的控制电路。控制电路包括分压器，控制器和自适应泄放器。分压器从输入端接收输入电压以产生调光信号。控制器响应于调光信号产生开关信号。控制器还响应于输入电压产生控制信号。自适应泄放器响应于控制信号接收控制信号并从输入端抽取泄放电流。

6. 发明申请

US20120242252A1 CONTROL CIRCUIT AND CONTROL METHOD FOR DIMMING LED LIGHTING CIRCUIT 有权
标题翻译： LED照明电路调光控制电路及控制方法
公开(公告)号：US20120242252A1
公开(公告)日：2012-09-27
申请号：US13223660
申请日：2011-09-01
申请人： Ta-Yung Yang , Li Lin , Chi-Yin Lo , Kuo-Hsien Huang , Hung-Chun Chen
发明人： Ta-Yung Yang , Li Lin , Chi-Yin Lo , Kuo-Hsien Huang , Hung-Chun Chen
IPC分类号： H05B37/02
CPC分类号： H05B33/0815
摘要： The present invention provides a control circuit for dimming LED lighting. The control circuit comprises a voltage divider, a controller and an adaptive bleeder. The voltage divider receives an input voltage from an input terminal to generate a dimming signal. The controller generates a switching signal in response to the dimming signal. The controller further generates a control signal in response to the input voltage. The adaptive bleeder receives the control signal and draws a bleeder current from the input terminal in response to the control signal.
摘要翻译：本发明提供一种用于调光LED照明的控制电路。控制电路包括分压器，控制器和自适应泄放器。分压器从输入端接收输入电压以产生调光信号。控制器响应于调光信号产生开关信号。控制器还响应于输入电压产生控制信号。自适应泄放器响应于控制信号接收控制信号并从输入端吸取泄放电流。

7. 发明授权

US08664998B2 Adaptive filter circuit for sampling a reflected voltage of transformer in a power converter and method thereof 有权
标题翻译：用于对功率转换器中的变压器的反射电压进行采样的自适应滤波器电路及其方法
公开(公告)号：US08664998B2
公开(公告)日：2014-03-04
申请号：US13336141
申请日：2011-12-23
申请人： Ta-Yung Yang , Li Lin , Jung-Sheng Chen , Chih-Hsien Hsieh , Yue-Hong Tang
发明人： Ta-Yung Yang , Li Lin , Jung-Sheng Chen , Chih-Hsien Hsieh , Yue-Hong Tang
IPC分类号： H03K5/00
CPC分类号： H02M1/34 , H02M2001/344
摘要： An adaptive filter circuit for sampling a reflected voltage of a transformer of a power converter includes a first switch for receiving the reflected voltage, a resistor having a first terminal and a second terminal, the first terminal of the resistor being coupled to the first switch, a capacitor coupled to the second terminal of the resistor for holding the reflected voltage, and a second switch coupled to the resistor in parallel, wherein the resistor and the capacitor develop a filter for sampling the reflected voltage which is sampled without filtering by the filter in a first period during a disable period of a switching signal and also sampled with filtering by the filter in a second period during the disable period of the switching signal.
摘要翻译：用于对功率转换器的变压器的反射电压进行采样的自适应滤波器电路包括用于接收反射电压的第一开关，具有第一端子和第二端子的电阻器，电阻器的第一端子耦合到第一开关，耦合到所述电阻器的所述第二端子以保持所述反射电压的电容器，以及并联耦合到所述电阻器的第二开关，其中所述电阻器和所述电容器形成滤波器，用于对所述滤波器进行采样而不被所述滤波器滤波在开关信号的禁止期间内的第一期间，并且在开关信号的禁止期间内，在第二期间通过滤波器进行滤波而进行采样。

8. 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。

9. 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。

10. 发明授权

US08559196B2 Output voltage control circuit of power converter for light-load power saving 有权
标题翻译：电源转换器输出电压控制电路，轻载省电
公开(公告)号：US08559196B2
公开(公告)日：2013-10-15
申请号：US12720096
申请日：2010-03-09
申请人： Ta-Yung Yang , Wei-Hsuan Huang , Chuh-Ching Li , Rui-Hong Lu , Jenn-Yu G. Lin
发明人： Ta-Yung Yang , Wei-Hsuan Huang , Chuh-Ching Li , Rui-Hong Lu , Jenn-Yu G. Lin
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A control circuit of a power converter for light-load power saving according to the present invention comprises a first feedback circuit coupled to an output voltage of the power converter to receive a first feedback signal. A second feedback circuit is coupled to the output voltage to receive a second feedback signal. A control circuit generates a switching signal for switching a transformer of the power converter and regulating the output voltage of the power converter in response to the first feedback signal and the second feedback signal. The switching signal is generated in accordance with the first feedback signal when an output load is high. The switching signal is generated in accordance with the second feedback signal during a light-load condition.
摘要翻译：根据本发明的用于轻载省电的功率转换器的控制电路包括耦合到功率转换器的输出电压的第一反馈电路以接收第一反馈信号。第二反馈电路耦合到输出电压以接收第二反馈信号。控制电路响应于第一反馈信号和第二反馈信号产生用于切换功率转换器的变压器的开关信号并调节功率转换器的输出电压。当输出负载高时，根据第一反馈信号产生开关信号。在轻负载状态期间根据第二反馈信号产生开关信号。

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