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1. 发明授权

US07362593B2 Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply 有权
标题翻译：具有关断时间调制的开关控制电路，以提高初级侧受控电源的效率
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。

2. 发明授权

US07151681B2 Multiple-sampling circuit for measuring reflected voltage and discharge time of a transformer 有权
标题翻译：用于测量变压器反射电压和放电时间的多重采样电路
公开(公告)号：US07151681B2
公开(公告)日：2006-12-19
申请号：US11022167
申请日：2004-12-21
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu G. Lin
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu G. Lin
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0009
摘要： A multiple-sampling circuit is proposed for measuring a voltage signal and a discharge time of a transformer. Sampling signals are used for generating hold voltages by alternately sampling the reflected voltage from the transformer. A buffer amplifier generates a buffer voltage from the higher voltage of hold voltages. A sampling switch periodically conducts the buffer voltage to produce a voltage-feedback signal. The voltage-feedback signal is proportional to an output voltage of the switching circuit. A threshold signal added to the reflected voltage signal produces a level-shift reflected signal. A discharge-time signal is generated as the switching signal is disabled. The discharge-time signal is disabled once the level-shift signal is lower than the voltage-feedback signal. The pulse width of the discharge-time signal is therefore correlated to the discharge time of the transformer. The sampling signals are enabled to generate hold voltages only when the discharge-time signal is enabled.
摘要翻译：提出了一种多采样电路，用于测量变压器的电压信号和放电时间。采样信号用于通过交替采样来自变压器的反射电压来产生保持电压。缓冲放大器从保持电压的较高电压产生缓冲电压。采样开关周期性地进行缓冲电压以产生电压反馈信号。电压反馈信号与开关电路的输出电压成比例。添加到反射电压信号的阈值信号产生电平移位反射信号。随着切换信号被禁止，产生放电时间信号。一旦电平移位信号低于电压反馈信号，放电时间信号被禁止。因此，放电时间信号的脉冲宽度与变压器的放电时间相关。采样信号仅在放电时间信号使能时才能产生保持电压。

3. 发明授权

US07088598B2 Power-mode control circuitry for power converters 有权
标题翻译：电源转换器的功率模式控制电路
公开(公告)号：US07088598B2
公开(公告)日：2006-08-08
申请号：US10817775
申请日：2004-04-02
申请人： Ta-yung Yang , Guo-Kiang Hung , Chiu Shao Wei
发明人： Ta-yung Yang , Guo-Kiang Hung , Chiu Shao Wei
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0009 , H02M2001/0019
摘要： A power-mode control circuitry is presented for power converters to precisely control a maximum of the output power. The power-mode control circuitry includes a filter to convert a switching current into an average-current signal. A voltage divider attenuates an input voltage of the power converter to an average-voltage signal. A multiplier produces a power signal by multiplying the average-current signal with the average-voltage signal. An error amplifier generates a programming signal by comparing the power signal with a power-level threshold. The programming signal further controls the switching signal for achieving power-mode control.
摘要翻译：为功率转换器提供功率模式控制电路，以精确控制输出功率的最大值。功率模式控制电路包括将开关电流转换为平均电流信号的滤波器。分压器将功率转换器的输入电压衰减为平均电压信号。乘法器通过将平均电流信号与平均电压信号相乘来产生功率信号。误差放大器通过将功率信号与功率电平阈值进行比较来产生编程信号。编程信号进一步控制切换信号以实现功率模式控制。

4. 发明申请

US20060133118A1 Multiple-sampling circuit for measuring reflected voltage and discharge time of a transformer 有权
公开(公告)号：US20060133118A1
公开(公告)日：2006-06-22
申请号：US11022167
申请日：2004-12-21
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0009
摘要： A multiple-sampling circuit is proposed for measuring a voltage signal and a discharge time of a transformer. Sampling signals are used for generating hold voltages by alternately sampling the reflected voltage from the transformer. A buffer amplifier generates a buffer voltage from the higher voltage of hold voltages. A sampling switch periodically conducts the buffer voltage to produce a voltage-feedback signal. The voltage-feedback signal is proportional to an output voltage of the switching circuit. A threshold signal added to the reflected voltage signal produces a level-shift reflected signal. A discharge-time signal is generated as the switching signal is disabled. The discharge-time signal is disabled once the level-shift signal is lower than the voltage-feedback signal. The pulse width of the discharge-time signal is therefore correlated to the discharge time of the transformer. The sampling signals are enabled to generate hold voltages only when the discharge-time signal is enabled.

5. 发明授权

US07061225B2 Apparatus and method thereof for measuring output current from primary side of power converter 有权
标题翻译：用于测量功率转换器初级侧的输出电流的装置及方法
公开(公告)号：US07061225B2
公开(公告)日：2006-06-13
申请号：US10881202
申请日：2004-06-29
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu G. Lin
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu G. Lin
IPC分类号： G01R19/30 , H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0009
摘要： An apparatus and method thereof for measuring an output current from a primary side of a power converter are provided. A peak detector is designed to sample a peak value of a converted voltage of a primary-side switching current. A zero-current detector detects a discharge-time of a secondary-side switching current through an auxiliary winding of a transformer. An oscillator generates a switching signal for switching the power converter. An integrator generates an integrated signal by integrating the converted voltage of the primary-side switching peak current with the discharge-time. The time constant of the integrator is correlated with the switching period of the switching signal. The integrated signal is thus proportional to the output current of the power converter.
摘要翻译：提供了一种用于测量来自功率转换器的初级侧的输出电流的装置和方法。峰值检测器被设计为对初级侧开关电流的转换电压的峰值进行采样。零电流检测器检测通过变压器的辅助绕组的次级侧开关电流的放电时间。振荡器产生用于切换功率转换器的开关信号。积分器通过将初级侧开关峰值电流的转换电压与放电时间进行积分来生成积分信号。积分器的时间常数与开关信号的开关周期相关。因此，积分信号与功率转换器的输出电流成比例。

6. 发明申请

US20060055433A1 Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply 有权
标题翻译：具有关断时间调制的开关控制电路，以提高初级侧受控电源的效率
公开(公告)号：US20060055433A1
公开(公告)日：2006-03-16
申请号：US10943668
申请日：2004-09-16
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Chuh-Ching Li , Feng Tsao
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Chuh-Ching Li , Feng Tsao
IPC分类号： G01R25/00
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。

7. 发明申请

US20060050539A1 Switching control circuit with variable switching frequency for primary-side-controlled power converters 有权
标题翻译：具有可变开关频率的开关控制电路，用于初级侧面电源转换器
公开(公告)号：US20060050539A1
公开(公告)日：2006-03-09
申请号：US10938463
申请日：2004-09-09
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Feng Tsao , Chiu Wei
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Feng Tsao , Chiu Wei
IPC分类号： H02M3/335
CPC分类号： H02M1/44 , H02M3/33523
摘要： The invention presents a switching control circuit for a primary-side-controlled power converter. A pattern generator produces a digital pattern to control a programmable capacitor that is connected to an oscillator, which produces frequency hopping to reduce the EMI. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. A current-waveform detector and an integrator generate a feedback signal. The integration of a current-waveform signal with a timing signal generates the average-current signal. Time constant of the integrator is correlated to the switching frequency. The oscillator generates the timing signal and a pulse signal in response to the output of a current-loop error amplifier. A PWM circuit generates the switching signal in response to the pulse signal and the output of a voltage-loop error amplifier for switching the switching device and regulating the output of the power converter.
摘要翻译：本发明提出了一种用于初级侧控制功率转换器的开关控制电路。模式发生器产生数字模式以控制连接到振荡器的可编程电容器，其产生跳频以减少EMI。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。电流波形检测器和积分器产生反馈信号。电流波形信号与定时信号的积分产生平均电流信号。积分器的时间常数与开关频率相关。振荡器响应于电流环路误差放大器的输出产生定时信号和脉冲信号。 PWM电路响应于脉冲信号和用于切换开关装置的电压环路误差放大器的输出并且调节功率转换器的输出而产生开关信号。

8. 发明申请

US20050285587A1 Apparatus and method thereof for measuring output current from primary side of power converter 有权
标题翻译：用于测量功率转换器初级侧的输出电流的装置及方法
公开(公告)号：US20050285587A1
公开(公告)日：2005-12-29
申请号：US10881202
申请日：2004-06-29
申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin
发明人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin
IPC分类号： H02M3/335 , H02M7/00
CPC分类号： H02M3/33507 , H02M2001/0009
摘要： An apparatus and method thereof for measuring an output current from a primary side of a power converter are provided. A peak detector is designed to sample a peak value of a converted voltage of a primary-side switching current. A zero-current detector detects a discharge-time of a secondary-side switching current through an auxiliary winding of a transformer. An oscillator generates a switching signal for switching the power converter. An integrator generates an integrated signal by integrating the converted voltage of the primary-side switching peak current with the discharge-time. The time constant of the integrator is correlated with the switching period of the switching signal. The integrated signal is thus proportional to the output current of the power converter.
摘要翻译：提供了一种用于测量来自功率转换器的初级侧的输出电流的装置和方法。峰值检测器被设计为对初级侧开关电流的转换电压的峰值进行采样。零电流检测器检测通过变压器的辅助绕组的次级侧开关电流的放电时间。振荡器产生用于切换功率转换器的开关信号。积分器通过将初级侧开关峰值电流的转换电压与放电时间进行积分来生成积分信号。积分器的时间常数与开关信号的开关周期相关。因此，积分信号与功率转换器的输出电流成比例。

9. 发明授权

US07203079B2 Switching controller having frequency hopping for power supplies 有权
标题翻译：开关控制器具有电源跳频功能
公开(公告)号：US07203079B2
公开(公告)日：2007-04-10
申请号：US10898389
申请日：2004-07-23
申请人： Ta-yung Yang , Guo-Kiang Hung , Song-Yi Lin
发明人： Ta-yung Yang , Guo-Kiang Hung , Song-Yi Lin
IPC分类号： H02M1/12
CPC分类号： H02M3/33523 , H02M1/44
摘要： A switching controller having frequency hopping is used for reducing the EMI of a power supply. A pattern generator generates a digital pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal. A programmable capacitor coupled to the oscillator modulates the switching frequency in response to the variation of the digital pattern code. An attenuator connected to a voltage feedback loop attenuates a feedback signal. The feedback signal controls the pulse width of the switching signal. A programmable resistor coupled to the attenuator determines an attenuation rate of the attenuator in response to the digital pattern code. The attenuation rate is increased as the switching frequency increases. The pulse width of the switching signal is thus reduced, which compensates the decrease of the switching period and keeps the output power and the output voltage constant.
摘要翻译：具有跳频的开关控制器用于降低电源的EMI。模式发生器响应于时钟信号产生数字模式码。振荡器产生用于确定开关信号的开关频率的振荡信号。耦合到振荡器的可编程电容器响应于数字图形码的变化来调制开关频率。连接到电压反馈环路的衰减器衰减反馈信号。反馈信号控制开关信号的脉冲宽度。耦合到衰减器的可编程电阻器响应于数字图案码确定衰减器的衰减率。衰减率随着开关频率的增加而增加。因此，开关信号的脉冲宽度被减小，这补偿了开关周期的减小并保持输出功率和输出电压恒定。

10. 发明申请

US20060056204A1 Switching control circuit for primary-side controlled power converters 有权
标题翻译：初级侧电源转换器的开关控制电路
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。

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