公开(公告)号：US09520767B2

公开(公告)日：2016-12-13

申请号：US13606025

申请日：2012-09-07

Applicant: Ta-Yung Yang

Inventor： Ta-Yung Yang

IPC: H02H7/122 ,  H02M1/32 ,  H02M3/335 ,  H02H7/12

CPC classification number: H02M1/32 ,  H02H7/1216 ,  H02M3/33523

Abstract: A protection circuit of a power converter without an input capacitor is disclosed. The protection circuit comprises a high voltage switch, a detection circuit and a control circuit. The switch senses an input voltage of the power converter via a resistor for generating a first signal. The detection circuit coupled to a transformer senses the input voltage of the power converter for generating a second signal. The control circuit controls a switching signal in response to the first signal and the second signal. The switching signal is utilized to switching the transformer for regulating the power converter; and the level of the first signal and the second signal is correlated a level of the input voltage of the power converter.

Abstract translation: 公开了一种没有输入电容器的电源转换器的保护电路。 保护电路包括高压开关，检测电路和控制电路。 开关通过用于产生第一信号的电阻感测功率转换器的输入电压。 耦合到变压器的检测电路感测功率转换器的输入电压以产生第二信号。 控制电路响应于第一信号和第二信号控制开关信号。 切换信号用于切换用于调节功率转换器的变压器; 并且第一信号和第二信号的电平与功率转换器的输入电压的电平相关。

公开(公告)号：US09148060B2

公开(公告)日：2015-09-29

申请号：US12356592

申请日：2009-01-21

Applicant: Ta-Yung Yang

Inventor： Ta-Yung Yang

IPC: H02M1/00 ,  H02M3/335 ,  H02M3/157 ,  H02M3/156 ,  H02M1/44

CPC classification number: H02M3/33507 ,  H02M1/44 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0032 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A switching controller of power converter according to the present invention comprises a PWM circuit and a burst-mode management circuit to reduce the power loss and the acoustic noise of the power converter at light-load. The PWM circuit generates a PWM signal. The burst-mode management circuit receives the PWM signal to generate a switching signal for generating a switching current and regulating the output of the power converter. The burst-mode management circuit further generates a current-limit signal in response to the output of the power converter to limit the switching current for reducing the power loss and the acoustic noise of the power converter when the power converter is at light-load.

Abstract translation: 根据本发明的电力转换器的开关控制器包括PWM电路和突发模式管理电路，以减轻功率转换器在轻载时的功率损耗和声学噪声。 PWM电路产生PWM信号。 突发模式管理电路接收PWM信号以产生用于产生开关电流并调节功率转换器的输出的开关信号。 突发模式管理电路还响应于功率转换器的输出而产生限流信号，以限制开关电流，以在功率转换器处于轻负载时降低功率转换器的功率损耗和声学噪声。

公开(公告)号：US09007786B2

公开(公告)日：2015-04-14

申请号：US13348963

申请日：2012-01-12

Applicant: Ta-Yung Yang ,  Li Lin ,  Chao-Chih Lin

Inventor： Ta-Yung Yang ,  Li Lin ,  Chao-Chih Lin

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M2001/0022

Abstract: The present invention proposes a switching controller of a flyback power converter. The switching controller includes a switching circuit, a sample-and-hold circuit, a voltage detection circuit, an oscillation circuit, and a comparator. The voltage detection circuit generates a holding signal when a level of an input voltage of the flyback power converter is lower than a low-threshold. The oscillation circuit limits the maximum frequency of switching signal. The maximum frequency is increased in response to a decrement of a modulation signal. The modulation signal correlated with a level of the input voltage is used to generate a control signal when the level of the input voltage is lower than an ultra-low-threshold. The control signal is enabled to operate the flyback power converter in continuous current mode operation. Therefore, an input capacitor can be eliminated and manufacturing cost is saved.

Abstract translation: 本发明提出了一种反激式功率转换器的开关控制器。 开关控制器包括开关电路，采样保持电路，电压检测电路，振荡电路和比较器。 当反激式功率转换器的输入电压的电平低于低阈值时，电压检测电路产生保持信号。 振荡电路限制开关信号的最大频率。 响应于调制信号的减少，最大频率增加。 当输入电压的电平低于超低阈值时，与输入电压的电平相关的调制信号用于产生控制信号。 控制信号使能在连续电流模式下操作反激式功率转换器。 因此，可以消除输入电容器并节省制造成本。

公开(公告)号：US08934266B2

公开(公告)日：2015-01-13

申请号：US13591207

申请日：2012-08-21

Applicant: Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

Inventor： Ta-Yung Yang ,  Li Lin ,  Yue-Hong Tang

IPC: H02M3/335

CPC classification number: H02M3/335 ,  H02M2001/0022 ,  H02M2001/0025

Abstract: A method for controlling a power converter is provided. The method includes the following steps. A switching signal coupled to switch a transformer for regulating the output of the power converter is generated in accordance with a feedback signal and a ramp signal. The ramp signal is generated in accordance with a switching current signal and a slope compensation signal. The slope compensation signal is generated in response to an input voltage signal. The input voltage signal is generated in response to the level of the input voltage of the power converter. The feedback signal is generated in accordance with the output of the power converter, and the switching current signal is correlated with a switching current of the transformer.

Abstract translation: 提供一种用于控制功率转换器的方法。 该方法包括以下步骤。 根据反馈信号和斜坡信号产生耦合以切换用于调节功率转换器的输出的变压器的开关信号。 斜坡信号根据开关电流信号和斜率补偿信号产生。 斜坡补偿信号是根据输入电压信号产生的。 响应于功率转换器的输入电压的电平而产生输入电压信号。 反馈信号根据功率转换器的输出产生，开关电流信号与变压器的开关电流相关。

公开(公告)号：US08767417B2

公开(公告)日：2014-07-01

申请号：US13099595

申请日：2011-05-03

Applicant: Chao-Chih Lin ,  Ta-Yung Yang ,  Ying-Chieh Su

Inventor： Chao-Chih Lin ,  Ta-Yung Yang ,  Ying-Chieh Su

IPC: H02M3/335

CPC classification number: H02M3/3353

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08749999B2

公开(公告)日：2014-06-10

申请号：US13344134

申请日：2012-01-05

Applicant: Ta-Yung Yang ,  Keun-Eul Hong ,  Jung-Sheng Chen ,  Ju-hyun Kim

Inventor： Ta-Yung Yang ,  Keun-Eul Hong ,  Jung-Sheng Chen ,  Ju-hyun Kim

IPC: H02M3/335 ,  H02H7/122

CPC classification number: H02M3/33523 ,  H02M1/32 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A controller of a power converter is provided. The controller includes a feedback circuit, an output circuit, and a clamping circuit. The feedback circuit generates a feedback signal in accordance with output of the power converter. The output circuit generates a switching signal in accordance with the feedback signal for regulating the output of the power converter. The clamping circuit limits the feedback signal under a first level for a first load condition and limits the feedback signal under a second level for a second load condition. The clamping circuit includes a timer circuit. The timer circuit determines a slew rate of the feedback signal for increasing the feedback signal from the first level to the second level, and the second level is higher than the first level.

Abstract translation: 提供电源转换器的控制器。 控制器包括反馈电路，输出电路和钳位电路。 反馈电路根据功率转换器的输出产生反馈信号。 输出电路根据用于调节功率转换器的输出的反馈信号产生开关信号。 钳位电路将反馈信号限制在第一级的第一负载条件下，并将反馈信号限制在第二级的第二负载条件。 钳位电路包括定时器电路。 定时器电路确定用于将反馈信号从第一电平增加到第二电平的反馈信号的转换速率，并且第二电平高于第一电平。

公开(公告)号：US20140126250A1

公开(公告)日：2014-05-08

申请号：US14069380

申请日：2013-11-01

Applicant: Chien-Tung Lan ,  Ta-Yung Yang

Inventor： Chien-Tung Lan ,  Ta-Yung Yang

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M2001/327

Abstract: A control circuit of a power converter and a method for controlling the power converter are provided. The control circuit of the power converter comprises a switching circuit and a temperature-sensing device. The switching circuit generates a switching signal in response to a feedback signal, and the switching circuit generates a current-sensing signal for regulating an output of the power converter. The temperature-sensing device generates a temperature signal in response to temperature of the temperature-sensing device.

Abstract translation: 提供了功率转换器的控制电路和用于控制功率转换器的方法。 功率转换器的控制电路包括开关电路和温度感测装置。 开关电路响应于反馈信号产生开关信号，并且开关电路产生用于调节功率转换器的输出的电流感测信号。 温度感测装置响应于温度感测装置的温度产生温度信号。

公开(公告)号：US08605462B2

公开(公告)日：2013-12-10

申请号：US12546801

申请日：2009-08-25

Applicant: Ta-Yung Yang

Inventor： Ta-Yung Yang

IPC: H02M3/335

CPC classification number: H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: The present invention provides a switching circuit to regulate an output voltage and a maximum output current at the primary side of a resonant power converter. The switching circuit includes a pair of switching devices and a controller. The controller is coupled to a transformer to sample a voltage signal thereof and generates switching signals to control the switching devices. The switching frequency of the switching signals is increased in response to the decrease of the output voltage. The increase of the switching frequency of the switching signals decreases the power delivered to the output of the resonant power converter. The output current is therefore regulated.

Abstract translation: 本发明提供了一种用于调节在谐振功率转换器初级侧的输出电压和最大输出电流的开关电路。 开关电路包括一对开关装置和控制器。 控制器耦合到变压器以对其电压信号进行采样，并产生开关信号以控制开关装置。 响应于输出电压的降低，开关信号的开关频率增加。 开关信号的开关频率的增加降低了输送到谐振功率转换器的输出端的功率。 因此输出电流被调节。

公开(公告)号：US08525554B2

公开(公告)日：2013-09-03

申请号：US13338305

申请日：2011-12-28

Applicant: Ta-Yung Yang ,  Kai-Fang Wei ,  Yen-Ting Chen

Inventor： Ta-Yung Yang ,  Kai-Fang Wei ,  Yen-Ting Chen

IPC: G01R19/00

CPC classification number: G01R19/0092

Abstract: The present invention provides a high-side signal sensing circuit. The high-side signal sensing circuit comprises a signal-to-current converter, a second transistor and a resistor. The signal-to-current converter has a first transistor generating a mirror current in response to an input signal. The second transistor cascaded with the first transistor is coupled to receive the mirror current. The resistor generates an output signal in response to the mirror current. Wherein, the level of the output signal is corrected to the level of the input signal.

Abstract translation: 本发明提供一种高侧信号感测电路。 高侧信号感测电路包括信号到电流转换器，第二晶体管和电阻器。 信号到电流转换器具有响应于输入信号产生反射镜电流的第一晶体管。 与第一晶体管级联的第二晶体管被耦合以接收镜电流。 电阻响应于镜电流而产生输出信号。 其中，输出信号的电平被校正到输入信号的电平。

公开(公告)号：US08432109B2

公开(公告)日：2013-04-30

申请号：US13073095

申请日：2011-03-28

Applicant: Ta-Yung Yang ,  Li Lin ,  Chih-Hsien Hsieh ,  Chuh-Ching Li ,  Chi-Yin Lo ,  Kuo-Hsiem Huang

Inventor： Ta-Yung Yang ,  Li Lin ,  Chih-Hsien Hsieh ,  Chuh-Ching Li ,  Chi-Yin Lo ,  Kuo-Hsiem Huang

IPC: H05B37/02

CPC classification number: H05B33/0815

Abstract: 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.

Abstract translation: 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。