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。

公开(公告)号：US20060031689A1

公开(公告)日：2006-02-09

申请号：US10914820

申请日：2004-08-09

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： G06F1/26

CPC分类号： G06F1/26

摘要： A switching frequency jitter having output ripple cancel includes a pattern generator generating a pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal in response to the variation of the pattern code. An attenuator is connected to a voltage feedback loop for attenuating a feedback signal. The feedback signal is utilized to control the pulse width of the switching signal. A programmable resistor is connected to the attenuator for programming an attenuation rate of the attenuator in response to the pattern code. The attenuation rate is increased whenever 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 of the power supply constant.

摘要翻译： 具有输出波纹消除的开关频率抖动包括响应于时钟信号产生模式代码的模式发生器。 振荡器响应于模式代码的变化产生用于确定开关信号的开关频率的振荡信号。 衰减器连接到用于衰减反馈信号的电压反馈环路。 反馈信号用于控制开关信号的脉冲宽度。 可编程电阻器连接到衰减器，用于响应于图案代码编程衰减器的衰减率。 每当开关频率增加时，衰减率就会增加。 因此，开关信号的脉冲宽度减小，这补偿了开关周期的减小，并保持电源的输出功率和输出电压恒定。

公开(公告)号：US20060017426A1

公开(公告)日：2006-01-26

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： G05F1/40

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。

公开(公告)号：US20070139980A1

公开(公告)日：2007-06-21

申请号：US11679729

申请日：2007-02-27

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。

公开(公告)号：US07184283B2

公开(公告)日：2007-02-27

申请号：US10914820

申请日：2004-08-09

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： G06F1/26

摘要： A switching frequency jitter having output ripple cancel includes a pattern generator generating a pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal in response to the variation of the pattern code. An attenuator is connected to a voltage feedback loop for attenuating a feedback signal. The feedback signal is utilized to control the pulse width of the switching signal. A programmable resistor is connected to the attenuator for programming an attenuation rate of the attenuator in response to the pattern code. The attenuation rate is increased whenever 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 of the power supply constant.

摘要翻译： 具有输出波纹消除的开关频率抖动包括响应于时钟信号产生模式代码的模式发生器。 振荡器响应于模式代码的变化产生用于确定开关信号的开关频率的振荡信号。 衰减器连接到用于衰减反馈信号的电压反馈环路。 反馈信号用于控制开关信号的脉冲宽度。 可编程电阻器连接到衰减器，用于响应于图案代码编程衰减器的衰减率。 每当开关频率增加时，衰减率就会增加。 因此，开关信号的脉冲宽度减小，这补偿了开关周期的减小，并保持电源的输出功率和输出电压恒定。

公开(公告)号：US07026851B2

公开(公告)日：2006-04-11

申请号：US10844677

申请日：2004-05-12

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： H03K3/017

CPC分类号： H03K3/0231 ,  H02M3/33507 ,  H03K7/08 ,  H04B15/04 ,  H04B2215/064 ,  H04B2215/067

摘要： A PWM controller having frequency jitter includes a modulator for generating a first jitter current and a second jitter current. An oscillator generates a pulse signal for producing a switching frequency in response to the modulation of the first jitter current. An attenuator is connected in a voltage feedback loop for attenuating a feedback signal to an attenuated feedback signal, in which the attenuated feedback signal is utilized to control an on-time of a switching signal. A variable-resistance circuit is connected with the attenuator for programming an attenuation rate of the attenuator in response to the modulation of the second jitter current. The switching frequency increases whenever the first jitter current increases. Meanwhile, the impedance of the attenuator will decreases and the attenuation rate will increase whenever the second jitter current increase. The on-time of the switching signal is thus immediately reduced, which compensates the decrease of the switching period and keeps the output power as a constant.

摘要翻译： 具有频率抖动的PWM控制器包括用于产生第一抖动电流和第二抖动电流的调制器。 振荡器响应于第一抖动电流的调制产生用于产生开关频率的脉冲信号。 衰减器连接在电压反馈环路中，用于将反馈信号衰减到衰减的反馈信号，其中衰减的反馈信号用于控制开关信号的接通时间。 可变电阻电路与衰减器连接，用于响应于第二抖动电流的调制来编程衰减器的衰减率。 每当第一个抖动电流增加时，开关频率就会增加。 同时，当第二个抖动电流增加时，衰减器的阻抗将降低，衰减率将增加。 开关信号的导通时间因此立即减小，这补偿了开关周期的减小并将输出功率保持为常数。

公开(公告)号：US20050253636A1

公开(公告)日：2005-11-17

申请号：US10844677

申请日：2004-05-12

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： H02M3/335 ,  H03K3/017 ,  H03K3/0231 ,  H03K7/08 ,  H04B15/04

CPC分类号： H03K3/0231 ,  H02M3/33507 ,  H03K7/08 ,  H04B15/04 ,  H04B2215/064 ,  H04B2215/067

摘要： A PWM controller having frequency jitter includes a modulator for generating a first jitter current and a second jitter current. An oscillator generates a pulse signal for producing a switching frequency in response to the modulation of the first jitter current. An attenuator is connected in a voltage feedback loop for attenuating a feedback signal to an attenuated feedback signal, in which the attenuated feedback signal is utilized to control an on-time of a switching signal. A variable-resistance circuit is connected with the attenuator for programming an attenuation rate of the attenuator in response to the modulation of the second jitter current. The switching frequency increases whenever the first jitter current increases. Meanwhile, the impedance of the attenuator will decreases and the attenuation rate will increase whenever the second jitter current increase. The on-time of the switching signal is thus immediately reduced, which compensates the decrease of the switching period and keeps the output power as a constant.

摘要翻译： 具有频率抖动的PWM控制器包括用于产生第一抖动电流和第二抖动电流的调制器。 振荡器响应于第一抖动电流的调制产生用于产生开关频率的脉冲信号。 衰减器连接在电压反馈环路中，用于将反馈信号衰减到衰减的反馈信号，其中衰减的反馈信号用于控制开关信号的接通时间。 可变电阻电路与衰减器连接，用于响应于第二抖动电流的调制来编程衰减器的衰减率。 每当第一个抖动电流增加时，开关频率就会增加。 同时，当第二个抖动电流增加时，衰减器的阻抗将降低，衰减率将增加。 开关信号的导通时间因此立即减小，这补偿了开关周期的减小并将输出功率保持为常数。

公开(公告)号：US07391628B2

公开(公告)日：2008-06-24

申请号：US11679729

申请日：2007-02-27

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。

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：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。