公开(公告)号：US20060197153A1

公开(公告)日：2006-09-07

申请号：US11065497

申请日：2005-02-23

Applicant: Chih-Feng Huang ,  Tuo-Hsin Chien ,  Jenn-yu Lin ,  Ta-yung Yang

Inventor： Chih-Feng Huang ,  Tuo-Hsin Chien ,  Jenn-yu Lin ,  Ta-yung Yang

IPC: H01L29/76 ,  H01L29/94 ,  H01L31/00

CPC classification number: H01L29/7811 ,  H01L29/0615 ,  H01L29/0696 ,  H01L29/1095

Abstract: A structure of a vertical transistor with field region is provided. The vertical transistor comprises a field-doping region formed in a substrate next to a core region of the vertical transistor. By modulating the doping density, length, and geometrical pattern of the field region, and by connecting the field region to respective well of rim core regions of the vertical transistor, the present invention realizes a stable breakdown voltage with short length of the field region. Therefore, the device area and the manufacturing cost can be reduced.

Abstract translation: 提供具有场区域的垂直晶体管的结构。 垂直晶体管包括形成在垂直晶体管的芯区域旁边的衬底中的场掺杂区域。 通过调制场区域的掺杂密度，长度和几何图案，并且通过将场区域连接到垂直晶体管的边缘芯区域的相应阱，本发明实现了场区域的短长度的稳定的击穿电压。 因此，可以减少设备面积和制造成本。

公开(公告)号：US20060034102A1

公开(公告)日：2006-02-16

申请号：US10917106

申请日：2004-08-12

Applicant: Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

Inventor： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M2001/0006 ,  H02M2001/0009

Abstract: 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 comprises 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.

Abstract translation: 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：US20050024898A1

公开(公告)日：2005-02-03

申请号：US10629103

申请日：2003-07-28

Applicant: Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

Inventor： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

IPC: H02M3/335 ,  H02M7/00

CPC classification number: H02M3/33507 ,  H02M1/32 ,  H02M2001/0006 ,  H02M2001/0032 ,  H02M2001/0041 ,  Y02B70/16

Abstract: The present invention provides a primary-side flyback power converter that supplies a constant voltage output and a constant current output. To generate a well-regulated output voltage under varying load conditions, a PWM controller is included in the power converter in order to generate a PWM signal controlling a switching transistor in response to a flyback voltage sampled from a first primary winding of the power supply transformer. Several improvements are included in this present invention to overcome the disadvantages of prior-art flyback power converters. Firstly, the flyback energy of the first primary winding is used as a DC power source for the PWM controller in order to reduce power consumption. A double sample amplifier samples the flyback voltage just before the transformer current drops to zero. Moreover, an offset current is pulled from a detection input of the double sample amplifier in order to generate a more accurate DC output voltage. The offset current is generated in response to the temperature in order to compensate for temperature-induced voltage fluctuations across the output rectifier. Ultimately, in order to maintain a constant output current, the PWM controller modulates the switching frequency in response to the output voltage.

Abstract translation: 本发明提供了提供恒定电压输出和恒定电流输出的初级侧反激式功率转换器。 为了在变化的负载条件下产生良好调节的输出电压，PWM控制器被包括在功率转换器中，以便响应于从电源变压器的第一初级绕组采样的回扫电压产生控制开关晶体管的PWM信号 。 在本发明中包括若干改进以克服现有技术的反激式功率转换器的缺点。 首先，为了降低功耗，首先将初级绕组的回扫能量用作PWM控制器的直流电源。 双倍采样放大器在变压器电流下降到零之前对反激电压进行采样。 此外，从双倍放大器的检测输入端拉出偏移电流，以产生更精确的直流输出电压。 偏移电流响应于温度而产生，以便补偿输出整流器两端的温度感应电压波动。 最终，为了保持恒定的输出电流，PWM控制器响应于输出电压来调制开关频率。

公开(公告)号：US20060133118A1

公开(公告)日：2006-06-22

申请号：US11022167

申请日：2004-12-21

Applicant: Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

Inventor： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M2001/0009

Abstract: 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.

公开(公告)号：US20060055433A1

公开(公告)日：2006-03-16

申请号：US10943668

申请日：2004-09-16

Applicant: Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Feng Tsao

Inventor： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Chuh-Ching Li ,  Feng Tsao

IPC: G01R25/00

CPC classification number: H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

Abstract: 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.

Abstract translation: 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：US20060050539A1

公开(公告)日：2006-03-09

申请号：US10938463

申请日：2004-09-09

Applicant: Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Feng Tsao ,  Chiu Wei

Inventor： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin ,  Feng Tsao ,  Chiu Wei

IPC: H02M3/335

CPC classification number: H02M1/44 ,  H02M3/33523

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20050285587A1

公开(公告)日：2005-12-29

申请号：US10881202

申请日：2004-06-29

Applicant: Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

Inventor： Ta-yung Yang ,  Guo-Kiang Hung ,  Jenn-yu Lin

IPC: H02M3/335 ,  H02M7/00

CPC classification number: H02M3/33507 ,  H02M2001/0009

Abstract: 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.

Abstract translation: 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：US20050242796A1

公开(公告)日：2005-11-03

申请号：US10838925

申请日：2004-05-03

Applicant: Ta-yung Yang ,  Jenn-yu Lin ,  Chien-Liang Chen

Inventor： Ta-yung Yang ,  Jenn-yu Lin ,  Chien-Liang Chen

IPC: G05F1/40 ,  G05F1/575 ,  H02M3/00

CPC classification number: G05F1/575

Abstract: A method and apparatus to dynamically modify internal compensation of a low dropout (LDO) voltage regulator is provided. The LDO voltage regulator includes an output pass transistor, an error amplifier, a bias transistor and a compensation network. The compensation network is connected between a gate and a drain of the output pass transistor to compensate for the feedback loop. The compensation network and the bias transistor generate pole-zero pairs to perform a maximum 45 degrees phase shift before reaching the crossover frequency in the LDO voltage regulator. Therefore a minimum 45 degrees phase margin is provided for the feedback loop in various load conditions. Furthermore, the pole-zero pairs produced in the LDO voltage regulator are adaptively adjusted according to load conditions, so that the bandwidth is optimized and faster transient response is achieved.

Abstract translation: 提供了一种用于动态修改低压差（LDO）电压调节器的内部补偿的方法和装置。 LDO稳压器包括输出传输晶体管，误差放大器，偏置晶体管和补偿网络。 补偿网络连接在输出传输晶体管的栅极和漏极之间，以补偿反馈环路。 补偿网络和偏置晶体管产生极点对，以在LDO稳压器达到交越频率之前执行最大45度相移。 因此，在各种负载条件下，为反馈回路提供最小45度的相位裕度。 此外，LDO稳压器中产生的极点对根据负载条件进行自适应调整，从而实现带宽优化，实现更快的瞬态响应。

公开(公告)号：US20050007088A1

公开(公告)日：2005-01-13

申请号：US10617516

申请日：2003-07-10

Applicant: Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

Inventor： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

IPC: H02M1/00 ,  H02M1/42 ,  G05F1/40

CPC classification number: H02M1/4225 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/16

Abstract: A PFC-PWM controller with a power saving means is disclosed. A built-in current synthesizer generates a bias current in response to feedback voltages sampled from the PWM circuit and the PFC circuit. The bias current modulates the oscillation frequency to further reduce the switching frequencies of the PWM signal and the PFC signal under light-load and zero-load conditions. Thus, power consumption is greatly reduced. The PFC and the PWM switching signals interleave each other, so that power can be transferred more smoothly from the PFC circuit to the PWM circuit. The saturation of the switching components can be avoided by limiting the maximum on-time of the PWM signal. Further, an external resistor is used to start up the PFC-PWM controller and to provide an AC template signal for PFC control.

Abstract translation: 公开了具有省电装置的PFC-PWM控制器。 内置电流合成器响应于从PWM电路和PFC电路采样的反馈电压产生偏置电流。 偏置电流调制振荡频率，以进一步降低轻载和零负载条件下PWM信号和PFC信号的开关频率。 因此，功耗大大降低。 PFC和PWM开关信号彼此交错，使得功率可以从PFC电路更平稳地传输到PWM电路。 通过限制PWM信号的最大导通时间可以避免开关元件的饱和。 此外，外部电阻用于启动PFC-PWM控制器，并提供用于PFC控制的AC模板信号。