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：US06768655B1

公开(公告)日：2004-07-27

申请号：US10357842

申请日：2003-02-03

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： H02M3335

CPC分类号： H02M1/4225 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16 ,  Y02P80/112

摘要： The present invention discloses a ZCS discontinuous mode PFC controller having a power saving modulator. The controller turns on through the feedback resistor and the parasitic diode of the controller, thus eliminating the need for a startup resistor. To achieve ZCS, the inductor current is released to zero, while the switching signal is off, before the next switching cycle starts. In order to decrease the switching frequency for light load conditions, an off-time delay is inserted right before the start of every switching cycle. The off-time delay is modulated to be the function of the feedback voltage and supply voltage. When the supply voltage is lower than the limit voltage, the off-time delay will decrease to inhibit the decrease of a switching frequency therefore prevents a low supply voltage. The switching frequency is decreased in accordance with the decrease of the load. Consequently, the switching losses and power consumption for light load and no load conditions are reduced.

摘要翻译： 本发明公开了一种具有省电调制器的ZCS不连续模式PFC控制器。 控制器通过反馈电阻和控制器的寄生二极管接通，因此无需启动电阻。 为了实现ZCS，在下一个开关周期开始之前，电感电流释放为零，而开关信号关闭。 为了降低轻负载条件的开关频率，在每个开关周期开始之前插入关断时间延迟。 关断时间延迟被调制为反馈电压和电源电压的函数。 当电源电压低于极限电压时，关断时间延迟将降低，以抑制开关频率的降低，从而防止低电源电压。 开关频率根据负载的减小而减小。 因此，减轻了轻负载和无负载条件下的开关损耗和功耗。

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。

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：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。

公开(公告)号：US06744649B1

公开(公告)日：2004-06-01

申请号：US10248206

申请日：2002-12-27

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： H02M324

CPC分类号： H02M3/3376

摘要： A pulse width modulated soft-switching power converter, having a pair of main switches and a pair of auxiliary switches coupled to the primary winding of the transformer. The main switches and auxiliary switches intermittently conduct an input voltage source to the primary winding 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, the auxiliary switches are switched off, whereby the flyback energy achieves the zero-voltage transition. A zero-voltage-detection is employed to optimize the zero-voltage switching. The switching frequency is decreased in response to the decrease of the load. Furthermore, the auxiliary switching is restricted in accordance with the decrease of the load. Therefore reducing the power consumption in the light load and no load conditions.

摘要翻译： 一种脉宽调制软开关功率转换器，具有一对主开关和一对耦合到变压器初级绕组的辅助开关。 主开关和辅助开关间歇地将一个输入电压源传导到初级绕组，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。 在第四运行阶段，辅助开关被切断，由此回扫能量实现零电压转换。 采用零电压检测来优化零电压开关。 响应于负载的减小，开关频率降低。 此外，根据负载的减少来限制辅助开关。 因此降低轻载和无负载条件下的功耗。

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：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：USRE40656E1

公开(公告)日：2009-03-10

申请号：US11411208

申请日：2006-04-24

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

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。