公开(公告)号：US20060056204A1

公开(公告)日：2006-03-16

申请号：US10943318

申请日：2004-09-16

申请人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Shao-Wei Chiu

发明人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Shao-Wei Chiu

IPC分类号： H02M5/27

CPC分类号： H02M3/33507

摘要： The present invention discloses a switching control circuit for a primary-side controlled power converter. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by measuring a primary-side switching current. An integrator generates a current-feedback signal by integrating the current-waveform signal with the discharge time. A time constant of the integrator is correlated with the switching frequency, thus the current-feedback signal is proportional to an output current of the power converter. A PWM circuit controls the pulse width of the switching signal in response to the outputs of a voltage-loop error amplifier and a current-loop error amplifier. The output voltage and the maximum output current of the power converter are therefore regulated.

摘要翻译： 本发明公开了一种用于初级侧受控电力转换器的开关控制电路。 电压波形检测器产生电压反馈信号和放电时间信号。 电流波形检测器通过测量初级侧开关电流产生电流波形信号。 积分器通过将电流波形信号与放电时间进行积分来产生电流反馈信号。 积分器的时间常数与开关频率相关，因此电流反馈信号与功率转换器的输出电流成比例。 PWM电路响应于电压环路误差放大器和电流环路误差放大器的输出来控制开关信号的脉冲宽度。 因此调节功率转换器的输出电压和最大输出电流。

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。

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。

公开(公告)号：US07492613B2

公开(公告)日：2009-02-17

申请号：US11288726

申请日：2005-11-28

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng Cheng Tsao

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Feng Cheng Tsao

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H01F27/38

摘要： A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the reflected voltage detection. Furthermore, a blanking circuit ensures a minimum pulse width of the reflected voltage.

摘要翻译： 提供了用于检测变压器的反射电压的控制电路。 开发了用于对反射电压进行采样的检测电路。 因为反射电压的脉冲宽度在轻负载时较窄，因此偏置电路用于产生偏置信号以帮助反射电压检测。 此外，消隐电路确保反射电压的最小脉冲宽度。

公开(公告)号：US20080309380A1

公开(公告)日：2008-12-18

申请号：US11763138

申请日：2007-06-14

申请人： Ta-yung Yang ,  Chuh-Ching Li

发明人： Ta-yung Yang ,  Chuh-Ching Li

IPC分类号： H03K5/01

CPC分类号： H02M3/33507 ,  G01R19/0092 ,  H02M2001/0009

摘要： The present invention provides a method and apparatus for detecting a continuous current of a switching current. A current signal is produced in response to a switching current of the magnetic device. By sampling the waveform of the current signal in response to the enabling of a switching signal, a first current signal and a second current signal are generated. A continuous current signal is produced according to the first current signal and the second current signal. The continuous current signal is corrected to the continuous current of the switching current.

摘要翻译： 本发明提供一种用于检测开关电流的连续电流的方法和装置。 响应于磁性装置的开关电流产生电流信号。 通过响应于使能切换信号对当前信号的波形进行采样，产生第一电流信号和第二电流信号。 根据第一电流信号和第二电流信号产生连续电流信号。 连续电流信号被校正为开关电流的连续电流。

公开(公告)号：US07405595B2

公开(公告)日：2008-07-29

申请号：US11281685

申请日：2005-11-16

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

IPC分类号： H03K19/094 ,  H03K19/0175

CPC分类号： H03K17/04123

摘要： A high-side transistor driver including a driver circuit for generating a driving signal to drive a high-side transistor is provided. A floating supply terminal provides a supply voltage to the driver circuit. A floating ground terminal is connected to a source of the high-side transistor. A bootstrap diode is coupled between the floating supply terminal and a voltage source. A capacitor is connected to the bootstrap diode and is coupled between the floating supply terminal and the floating ground terminal. A high-voltage transistor is used for switching off the driving signal and the high-side transistor in response to an input signal. A speed-up capacitor is coupled to the driver circuit for speeding up the driving signal. Furthermore, the positive feedback circuits in the driver circuit further accelerate the driving signal and save power for the driver circuit.

摘要翻译： 提供了包括用于产生用于驱动高侧晶体管的驱动信号的驱动电路的高侧晶体管驱动器。 浮动电源端子向驱动器电路提供电源电压。 浮动接地端子连接到高侧晶体管的源极。 自举二极管耦合在浮动电源端子和电压源之间。 电容器连接到自举二极管并耦合在浮动电源端子和浮动接地端子之间。 高压晶体管用于响应于输入信号来关断驱动信号和高侧晶体管。 加速电容器耦合到驱动器电路以加速驱动信号。 此外，驱动电路中的正反馈电路进一步加速驱动信号并节省驱动电路的功率。

公开(公告)号：US07362593B2

公开(公告)日：2008-04-22

申请号：US10943668

申请日：2004-09-16

申请人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu G. Lin ,  Chuh-Ching Li ,  Feng Cheng Tsao

发明人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu G. Lin ,  Chuh-Ching Li ,  Feng Cheng Tsao

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifier amplifies the voltage-feedback signal and generates a control signal. An off-time modulator correspondingly generates a discharge-current signal and a standby signal in response to the control signal and an under-voltage signal. The under-voltage signal indicates a low supply voltage of the controller. An oscillator produces a pulse signal in response to the discharge-current signal. The pulse signal determines the off-time of the switching signal. A PWM circuit generates the switching signal in response to the pulse signal and the standby signal. The standby signal further controls the off-time of the switching signal and maintains a minimum switching frequency. The switching signal is used for regulating the output of the power supply.

摘要翻译： 电压波形检测器通过对变压器的电压信号进行多次采样来产生电压反馈信号和放电时间信号。 放电时间信号表示次级侧开关电流的放电时间。 电压环路误差放大器放大电压反馈信号并产生控制信号。 关断时间调制器相应地根据控制信号和欠压信号产生放电电流信号和待机信号。 欠压信号表示控制器的低电源电压。 振荡器响应于放电电流信号产生脉冲信号。 脉冲信号确定开关信号的关断时间。 PWM电路响应于脉冲信号和待机信号产生开关信号。 待机信号进一步控制开关信号的关断时间并保持最小开关频率。 开关信号用于调节电源的输出。

公开(公告)号：US20080012547A1

公开(公告)日：2008-01-17

申请号：US11456573

申请日：2006-07-11

申请人： Chuh-Ching Li ,  Ta-yung Yang

发明人： Chuh-Ching Li ,  Ta-yung Yang

IPC分类号： G01R31/02

CPC分类号： G01R15/183

摘要： A circuit for detecting an input voltage of a transformer is provided. The circuit includes a current source circuit coupled to a winding of a transformer. A current-to-voltage circuit is coupled to the current source circuit to generate a first voltage in response to a current outputted from the current source circuit. A sample-and-hold circuit generates an output voltage by sampling the first voltage. The transformer is coupled to the input voltage, and the output voltage is correlated to the input voltage of the transformer.

摘要翻译： 提供了用于检测变压器的输入电压的电路。 电路包括耦合到变压器绕组的电流源电路。 电流 - 电压电路耦合到电流源电路以响应于从电流源电路输出的电流产生第一电压。 采样保持电路通过对第一电压进行采样来产生输出电压。 变压器耦合到输入电压，输出电压与变压器的输入电压相关。

公开(公告)号：US20070109820A1

公开(公告)日：2007-05-17

申请号：US11274125

申请日：2005-11-16

申请人： Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Tso-Min Chen

发明人： Ta-Yung Yang ,  Rui-Hong Lu ,  Chuh-Ching Li ,  Feng-Cheng Tsao ,  Tso-Min Chen

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  Y02B70/1433

摘要： The present invention provides a power converter having a phase lock circuit for quasi-resonant soft switching. The power converter includes a first circuit coupled to the feedback signal to generate a switching signal for switching a switching device and regulating the output of the power converter. A second circuit is coupled to an auxiliary winding of the transformer for generating a voltage signal in response to the voltage of the transformer. A phase lock circuit generates a control signal to enable the switching signal in accordance with the voltage 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用于准谐振软开关的锁相电路的功率转换器。 功率转换器包括耦合到反馈信号的第一电路以产生用于切换开关装置并调节功率转换器的输出的开关信号。 第二电路耦合到变压器的辅助绕组，以响应于变压器的电压产生电压信号。 锁相电路根据电压信号产生控制信号以使能切换信号。 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。

公开(公告)号：US20070109020A1

公开(公告)日：2007-05-17

申请号：US11281685

申请日：2005-11-16

申请人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

发明人： Ta-yung Yang ,  Chuh-Ching Li ,  Yu-Min Chen

IPC分类号： H03K19/094

CPC分类号： H03K17/04123

摘要： A high-side transistor driver including a driver circuit for generating a driving signal to drive a high-side transistor is provided. A floating supply terminal provides a supply voltage to the driver circuit. A floating ground terminal is connected to a source of the high-side transistor. A bootstrap diode is coupled between the floating supply terminal and a voltage source. A capacitor is connected to the bootstrap diode and is coupled between the floating supply terminal and the floating ground terminal. A high-voltage transistor is used for switching off the driving signal and the high-side transistor in response to an input signal. A speed-up capacitor is coupled to the driver circuit for speeding up the driving signal. Furthermore, the positive feedback circuits in the driver circuit further accelerate the driving signal and save power for the driver circuit.

摘要翻译： 提供了包括用于产生用于驱动高侧晶体管的驱动信号的驱动电路的高侧晶体管驱动器。 浮动电源端子向驱动器电路提供电源电压。 浮动接地端子连接到高侧晶体管的源极。 自举二极管耦合在浮动电源端子和电压源之间。 电容器连接到自举二极管并耦合在浮动电源端子和浮动接地端子之间。 高压晶体管用于响应于输入信号来关断驱动信号和高侧晶体管。 加速电容器耦合到驱动器电路以加速驱动信号。 此外，驱动电路中的正反馈电路进一步加速驱动信号并节省驱动电路的功率。