公开(公告)号：US20110050308A1

公开(公告)日：2011-03-03

申请号：US12553398

申请日：2009-09-03

申请人： Jun-Shiung Huang ,  Chern-Lin Chen ,  Chang-Ling Sha ,  Ko-Yen Lee

发明人： Jun-Shiung Huang ,  Chern-Lin Chen ,  Chang-Ling Sha ,  Ko-Yen Lee

IPC分类号： H03K3/02

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

摘要： The present invention discloses a standby power reduction method and apparatus for switching power applications, the method comprising the steps of: performing a hysteresis comparison on a supply voltage to generate a selecting signal having a first state and a second state, wherein the hysteresis comparison has a high threshold voltage compared to the supply voltage when the selecting signal is at the first state, and the hysteresis comparison has a low threshold voltage compared to the supply voltage when the selecting signal is at the second state; and determining a UVLO_ON voltage according to the selecting signal, wherein the UVLO_ON voltage is equal to a first level when the selecting signal is at the first state, and the UVLO_ON voltage is equal to a second level when the selecting signal is at the second state.

摘要翻译： 本发明公开了一种用于切换电源应用的待机功率降低方法和装置，所述方法包括以下步骤：对电源电压执行滞后比较，以产生具有第一状态和第二状态的选择信号，其中滞后比较 当选择信号处于第一状态时与电源电压相比高的阈值电压，并且与选择信号处于第二状态时的电源电压相比，滞后比较具有低阈值电压; 以及根据选择信号确定UVLO_ON电压，其中当选择信号处于第一状态时，UVLO_ON电压等于第一电平，并且当选择信号处于第二状态时，UVLO_ON电压等于第二电平 。

公开(公告)号：US06853563B1

公开(公告)日：2005-02-08

申请号：US10629103

申请日：2003-07-28

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

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

IPC分类号： H02M3/335 ,  H02M7/00

CPC分类号： H02M3/33507 ,  H02M1/32 ,  H02M2001/0006 ,  H02M2001/0032 ,  H02M2001/0041 ,  Y02B70/16

摘要： 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.

摘要翻译： 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：US20050024898A1

公开(公告)日：2005-02-03

申请号：US10629103

申请日：2003-07-28

申请人： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

发明人： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

IPC分类号： H02M3/335 ,  H02M7/00

CPC分类号： H02M3/33507 ,  H02M1/32 ,  H02M2001/0006 ,  H02M2001/0032 ,  H02M2001/0041 ,  Y02B70/16

摘要： 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.

摘要翻译： 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：US06721192B1

公开(公告)日：2004-04-13

申请号：US10249214

申请日：2003-03-24

申请人： Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin ,  Yi-Hsin Leu

发明人： Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin ,  Yi-Hsin Leu

IPC分类号： H02M3335

CPC分类号： H02M3/33507 ,  H01F2038/026 ,  H02M2001/0025

摘要： A PWM controller according to the present invention provides a technique to control the output voltage and output current of the power supply without the feedback control circuit in the secondary side of the transformer. In order to achieve better regulation, an adaptive load and a feedback synthesizer are equipped into the PWM controller, which associated with the auxiliary winding of the transformer regulate the output voltage of the power supply as a constant. Furthermore, a programmable power limiter in the PWM controller controls the power that is delivered from the primary side to the output of the power supply. The threshold of the power limit is varied in accordance with the change of output voltage. Because the output power is the function of the output voltage of the power supply, a constant current output is realized when the output current of the power supply is greater than a maximum value.

摘要翻译： 根据本发明的PWM控制器提供了在变压器的次级侧没有反馈控制电路来控制电源的输出电压和输出电流的技术。 为了实现更好的调节，PWM控制器配备了自适应负载和反馈合成器，该控制器与变压器的辅助绕组相关联，将电源的输出电压调节为常数。 此外，PWM控制器中的可编程功率限制器控制从初级侧输出到电源输出的功率。 功率限制的阈值根据输出电压的变化而变化。 由于输出功率是电源输出电压的函数，当电源的输出电流大于最大值时，可实现恒流输出。

公开(公告)号：US20120194900A1

公开(公告)日：2012-08-02

申请号：US13218462

申请日：2011-08-26

申请人： Jiun-Wei LIOU ,  Jun-Ying LI ,  Chih-Ming LAI ,  Chern-Lin CHEN ,  Way-Seen WANG ,  Lung-Han PENG

发明人： Jiun-Wei LIOU ,  Jun-Ying LI ,  Chih-Ming LAI ,  Chern-Lin CHEN ,  Way-Seen WANG ,  Lung-Han PENG

IPC分类号： G02F1/37

CPC分类号： G02F1/37 ,  G02F1/3558 ,  G02F1/3775

摘要： A second-harmonic generation nonlinear frequency converter includes a nonlinear optical crystal. The nonlinear optical crystal includes a plurality of sections. The sections connect to each other in sequence, and each section has a phase different from others. Each of the phases includes a positive domain and a negative domain. Each of the sections includes a plurality of quasi-phase-matching structures. The quasi-phase-matching structures connect to each other in sequence and have the same phase in one section.

摘要翻译： 二次谐波发生非线性频率转换器包括非线性光学晶体。 非线性光学晶体包括多个部分。 这些部分依次相互连接，每个部分的阶段与其他部分不同。 每个相包括正域和负域。 每个部分包括多个准相位匹配结构。 准相位匹配结构依次相互连接，在一个部分中具有相同的相位。

公开(公告)号：US06954367B2

公开(公告)日：2005-10-11

申请号：US10248219

申请日：2002-12-29

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

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

IPC分类号： H02M3/335 ,  H02M3/337 ,  H02M3/24

CPC分类号： H02M3/3376 ,  H02M3/33569 ,  H02M2001/0048 ,  Y02B70/1491

摘要： A pulse width modulated soft-switching power converter has a transformer with a primary winding and a secondary winding, a secondary circuit coupled to the secondary winding, and a pair of main switches and a pair of auxiliary switches coupled to the primary winding. The main switches and auxiliary switches intermittently conduct an input voltage source to the primary winding of the transformer to operate the soft-switching power converter in four operation stages in each switching cycle. The main switches conduct the input voltage source to the transformer in a first operation stage. In a second operation stage, the conduction is cut off. The transformer operates as an inductor with the auxiliary switches switched on under zero-voltage or zero-current switching mode in a third operation stage. In the fourth operation stage, auxiliary switches are switched off to achieve zero-voltage transition.

摘要翻译： 脉冲宽度调制软开关功率转换器具有一个具有初级绕组和次级绕组的变压器，耦合到次级绕组的次级电路以及耦合到初级绕组的一对主开关和一对辅助开关。 主开关和辅助开关间歇地将一个输入电压源传送到变压器的初级绕组，以在每个开关周期的四个运行阶段中操作软开关功率转换器。 在第一个操作阶段，主开关将输入电压源传导到变压器。 在第二操作阶段，导通被切断。 变压器作为电感器工作，辅助开关在第三个运行阶段以零电压或零电流开关模式接通。 在第四个运行阶段，辅助开关被关闭以实现零电压转换。

公开(公告)号：US06900623B2

公开(公告)日：2005-05-31

申请号：US10617515

申请日：2003-07-10

申请人： Ta-yung Yang ,  Yi-Hsin Leu ,  Chern-Lin Chen ,  Jenn-yu G. Lin

发明人： Ta-yung Yang ,  Yi-Hsin Leu ,  Chern-Lin Chen ,  Jenn-yu G. Lin

IPC分类号： G05F1/40 ,  G05F1/56 ,  H02M1/00 ,  H02M1/42 ,  H02M7/00

CPC分类号： H02M1/4225 ,  H02M2001/4275 ,  Y02B70/126

摘要： A regulated power supply having power factor correction control includes a multi-vector error amplifier. The multi-vector error amplifier provides an error signal that is used to regulate a switching mechanism of the power supply. The multi-vector error amplifier acts to provide a low distortion error signal during steady-state operation, while responding rapidly and smoothly to sudden load changes.

摘要翻译： 具有功率因数校正控制的稳压电源包括多向量误差放大器。 多向量误差放大器提供了用于调节电源开关机构的误差信号。 多向量误差放大器用于在稳态运行期间提供低失真误差信号，同时快速平稳地响应突然的负载变化。

公开(公告)号：US20050057234A1

公开(公告)日：2005-03-17

申请号：US10666803

申请日：2003-09-17

申请人： Ta-Yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen

发明人： Ta-Yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen

IPC分类号： G05F1/575 ,  G05F3/26 ,  G05F1/40

CPC分类号： G05F1/575 ,  G05F3/262

摘要： A method and apparatus to dynamically modify the internal compensation of a low drop-out (LDO) 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 the DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response.

摘要翻译： 提出了一种动态修改低压差（LDO）稳压器内部补偿的方法和装置。 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。 如果需要，这允许输出电容的ESR减小到零，以改善瞬态响应。

公开(公告)号：US20050007088A1

公开(公告)日：2005-01-13

申请号：US10617516

申请日：2003-07-10

申请人： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

发明人： Ta-Yung Yang ,  Jenn-Yu Lin ,  Chern-Lin Chen

IPC分类号： H02M1/00 ,  H02M1/42 ,  G05F1/40

CPC分类号： H02M1/4225 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/16

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06768657B1

公开(公告)日：2004-07-27

申请号：US10249141

申请日：2003-03-19

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

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

IPC分类号： H02M114

CPC分类号： H02M3/33507

摘要： Incorporating the PWM function with the power saving means develops the PWM controller in which the switching frequency is decreased in response to the decrease of the load. Further, the current-driven design minimizes the circuitry and reduces the cost of the PWM controller. Since most of the control signals are operated in current mode, the die size of integrated circuit of the PWM controller is greatly reduced. An off-time modulator is provided for power saving in which the discharge current of the oscillator is modulated. Keeping the maximum on-time of the PWM signal as a constant and increasing the off-time of the PWM signal extends the switching period in light load conditions. The off-time modulation is the function of a feedback current, which is derived from the feedback loop. An array of current operation is designed to generate the feedback voltage for the PWM control and meanwhile produces a modulated discharge current for power saving. A minimum discharge current is limited to prevent the switching frequency from flowing into the audio-band. Moreover, the minimum discharge current is switched on/off in response to the state of the supply voltage in which the minimum discharge current is disabled when the supply voltage is high, and enabled once the supply voltage is lower than a threshold voltage; thereby preventing insufficient power from being supplied from the auxiliary bias winding for the PWM controller.

摘要翻译： 将PWM功能与省电装置相结合，开发出响应于负载减小而开关频率降低的PWM控制器。 此外，电流驱动设计可最大限度地减少电路并降低PWM控制器的成本。 由于大多数控制信号以电流模式工作，PWM控制器的集成电路的管芯尺寸大大降低。 提供了一种关断时间调制器用于节能，其中调制振荡器的放电电流。 将PWM信号的最大导通时间保持为常数，并增加PWM信号的关断时间在轻负载条件下延长了开关周期。 关断时间调制是反馈电流的函数，反馈电流是从反馈回路得到的。 设计了一个电流运算阵列，用于产生PWM控制的反馈电压，同时产生调制放电电流，实现省电。 限制最小放电电流以防止开关频率流入音频带。 此外，当电源电压高时，响应于最小放电电流被禁止的电源电压的状态，最小放电电流被接通/断开，并且一旦电源电压低于阈值电压就启动; 从而防止从用于PWM控制器的辅助偏置绕组提供不足的功率。