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：US07362592B2

公开(公告)日：2008-04-22

申请号：US10943318

申请日：2004-09-16

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

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

IPC分类号： H02M3/335

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正比。 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：US07061780B2

公开(公告)日：2006-06-13

申请号：US10938463

申请日：2004-09-09

申请人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu G. Lin ,  Feng Cheng Tsao ,  Chiu Shao Wei

发明人： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu G. Lin ,  Feng Cheng Tsao ,  Chiu Shao 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.

公开(公告)号：US07054170B2

公开(公告)日：2006-05-30

申请号：US10752363

申请日：2004-01-05

申请人： Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin ,  Guo-Kiang Hung

发明人： Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin ,  Guo-Kiang Hung

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H01F2038/026

摘要： A power-mode controlled power converter is capable of supplying a constant output voltage and output current. A PWM controller generates a PWM signal in response to a voltage sampled from a transformer auxiliary winding. A programmable current-sink and a detection resistor compensate for a voltage drop of an output rectifier. A low-pass filter integrates a switching-current voltage to an average-current signal. An attenuator produces an input-voltage signal from a line-voltage input signal. The PWM controller multiplies the average-current signal with the input-voltage signal to generate a power-control signal. An error-amplifier compares the power-control signal with a power-reference voltage to generate a limit voltage. The limit voltage controls the power delivered from a primary-side circuit to a secondary-side circuit of the power-mode controlled power converter. Since the power-reference voltage varies in proportional to output voltage variations, a constant output current is therefore achieved.

摘要翻译： 功率模式控制功率转换器能够提供恒定的输出电压和输出电流。 PWM控制器响应于从变压器辅助绕组采样的电压产生PWM信号。 可编程电流吸收器和检测电阻器补偿输出整流器的电压降。 低通滤波器将开关电流电压集成到平均电流信号。 衰减器从线电压输入信号产生输入电压信号。 PWM控制器将平均电流信号与输入电压信号相乘以产生功率控制信号。 误差放大器将功率控制信号与功率参考电压进行比较，以产生极限电压。 极限电压控制从功率模式受控功率转换器的初级侧电路到次级侧电路的功率。 由于功率参考电压与输出电压变化成比例变化，因此实现恒定的输出电流。

公开(公告)号：US07016204B2

公开(公告)日：2006-03-21

申请号：US10917106

申请日：2004-08-12

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 ,  H02M2001/0006 ,  H02M2001/0009

摘要： A close-loop PWM controller for a primary-side controlled power converter is provided. 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 signal. A time constant of the integrator is correlated with a switching period of the switching signal, therefore the current-feedback signal is proportional to the output current of the power converter. The close-loop PWM controller further including a voltage-loop error amplifier and a current-loop error amplifier. A PWM circuit and comparators control the pulse width of the switching signal in response to the outputs of the voltage-loop error amplifier and the current-loop error amplifier. The output voltage and the maximum output current of the power converter are therefore regulated.

摘要翻译： 提供了一个用于初级侧受控电源转换器的闭环PWM控制器。 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信号进行积分而产生电流反馈信号。 积分器的时间常数与开关信号的开关周期相关，因此电流反馈信号与功率转换器的输出电流成正比。 闭环PWM控制器还包括电压环路误差放大器和电流环路误差放大器。 PWM电路和比较器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：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。

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。

公开(公告)号：US07355250B2

公开(公告)日：2008-04-08

申请号：US11222707

申请日：2005-09-08

申请人： Chih-Feng Huang ,  Ta-yung Yang ,  Jenn-yu G. Lin ,  Tuo-Hsin Chien

发明人： Chih-Feng Huang ,  Ta-yung Yang ,  Jenn-yu G. Lin ,  Tuo-Hsin Chien

IPC分类号： H01L23/62 ,  H01L29/76 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113

CPC分类号： H01L27/0262

摘要： An electrostatic discharge (ESD) device with a parasitic silicon controlled rectifier (SCR) structure and controllable holding current is provided. A first distance is kept between a first N+ doped region and a first P+ doped region, and a second distance is kept between a second P+ doped region and a third N+ doped region. In addition, the holding current of the ESD device can be set to a specific value by modulating the first distance and the second distance. The holding current is in inverse proportion to the first distance and the second distance.

摘要翻译： 提供具有寄生可控硅整流器（SCR）结构和可控保持电流的静电放电（ESD）器件。 在第一N +掺杂区域和第一P +掺杂区域之间保持第一距离，并且在第二P +掺杂区域和第三N +掺杂区域之间保持第二距离。 此外，通过调制第一距离和第二距离，可以将ESD装置的保持电流设定为特定值。 保持电流与第一距离和第二距离成反比。

公开(公告)号：US06903421B1

公开(公告)日：2005-06-07

申请号：US10758919

申请日：2004-01-16

申请人： Chih-Feng Huang ,  Ta-yung Yang ,  Jenn-yu G. Lin ,  Tuo-Hsin Chien

发明人： Chih-Feng Huang ,  Ta-yung Yang ,  Jenn-yu G. Lin ,  Tuo-Hsin Chien

IPC分类号： H01L23/62 ,  H01L27/088 ,  H01L29/06 ,  H01L29/08 ,  H01L29/76 ,  H01L29/78 ,  H01L29/94

CPC分类号： H01L29/0634 ,  H01L29/0696 ,  H01L29/0886 ,  H01L29/42368 ,  H01L29/7816 ,  H01L2924/0002 ,  H01L2924/00

摘要： The isolated high-voltage LDMOS transistor according to the present invention includes a split N-well and P-well in the extended drain region. The P-well is split in the extended drain region of the N-well to form a split junction-field in the N-well. The split N-well and P-well deplete the drift region, which shifts the electric field maximum into the bulk of the N-well. This achieves a higher breakdown voltage and allows the N-well to have a higher doping density. Furthermore, the LDMOS transistor according to the present invention includes a N-well embedded beneath the source diffusion region. This creates a low-impedance path for the source region, which restricts the transistor current flow between the drain region and the source region.

摘要翻译： 根据本发明的隔离的高电压LDMOS晶体管在扩展漏极区域中包括分裂的N阱和P阱。 P阱在N阱的扩展漏极区域中分裂，以在N阱中形成分离的连接场。 分裂的N阱和P阱消耗了漂移区域，其将电场最大值移动到N阱的大部分中。 这实现了更高的击穿电压并且允许N阱具有更高的掺杂密度。 此外，根据本发明的LDMOS晶体管包括嵌入在源极扩散区之下的N阱。 这为源极区域产生低阻抗路径，这限制了漏极区域和源极区域之间的晶体管电流。

公开(公告)号：US06765374B1

公开(公告)日：2004-07-20

申请号：US10617951

申请日：2003-07-10

申请人： Ta-yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen ,  Jenn-yu G. Lin

发明人： Ta-yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen ,  Jenn-yu G. Lin

IPC分类号： G05F156

CPC分类号： G05F1/575

摘要： A method an apparatus to dynamically modify the internal compensation of a low drop-out (LDO) linear voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response. The zero induced by the ESR of the internal circuit is frequency compensated, so that it tracks the position of the output pole as the load varies.

摘要翻译： 提出了一种动态修改低压降（LDO）线性稳压器的内部补偿的装置的方法。 该过程涉及从内部电路产生额外的等效串联电阻（ESR）。 内部电路的额外ESR足以确保直流输出稳定性。 如果需要，这允许输出电容的ESR减小到零，以改善瞬态响应。 由内部电路的ESR引起的零频率被补偿，从而当负载变化时跟踪输出极的位置。