公开(公告)号：US07391626B1

公开(公告)日：2008-06-24

申请号：US11808411

申请日：2007-06-08

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M3/22

CPC classification number: H02M3/33561

Abstract: A chop-wave control circuit includes a feedback unit, a ramp generation unit, a latchup unit and a voltage transformation unit that is used on a forward transformation circuit which includes at least a main output unit and at least one auxiliary output unit. The feedback unit captures a feedback signal from an output end of the auxiliary output unit to generate a slope regulation signal. The ramp generation unit alters the trigger time sequence of the latchup unit through the slope regulation signal to set an auxiliary flywheel switch ON or OFF. The voltage transformation unit detects potential variations of the latchup unit to set a chop-wave switch ON or OFF. By controlling the auxiliary flywheel switch and the chop-wave switch a power output cycle of the auxiliary output unit can be formed.

Abstract translation: 斩波控制电路包括反馈单元，斜坡发生单元，闭锁单元和电压变换单元，其用于至少包括主输出单元和至少一个辅助输出单元的正向变换电路。 反馈单元从辅助输出单元的输出端捕获反馈信号以产生斜率调节信号。 斜坡发生单元通过斜坡调节信号改变闭锁单元的触发时间顺序，以设置辅助飞轮开关的ON或OFF。 电压变换单元检测闭锁单元的电位变化以将斩波开关设定为ON或OFF。 通过控制辅助飞轮开关和斩波开关，可以形成辅助输出单元的功率输出周期。

公开(公告)号：US20080111602A1

公开(公告)日：2008-05-15

申请号：US11599290

申请日：2006-11-15

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H03K3/017 ,  H03K3/00

CPC classification number: H03K7/08

Abstract: A cycle modulation circuit capable of limiting peak voltage to provide a pulse width control signal to a rear end power driving unit includes a comparison unit, an input voltage source and a linear voltage generation unit. The comparison unit compares an oscillation waveform signal generated by the linear voltage generation unit against a base value of a waveform signal level generated by the input voltage source to modulate and output the pulse width control signal of a combined cycle consisting of a high level and a low level. The pulse width control signal is input to the rear end power driving unit to limit the power driving unit in an equal restricted voltage peak value zone and determine the allowable duty cycle according to the level waveform signal.

Abstract translation: 能够限制峰值电压以向后端功率驱动单元提供脉冲宽度控制信号的周期调制电路包括比较单元，输入电压源和线性电压产生单元。 比较单元将由线性电压产生单元产生的振荡波形信号与由输入电压源产生的波形信号电平的基值进行比较，以调制和输出由高电平和 低级。 脉冲宽度控制信号被输入到后端电力驱动单元，以将功率驱动单元限制在相等的限制电压峰值区域，并根据电平波形信号确定允许占空比。

公开(公告)号：US20080031016A1

公开(公告)日：2008-02-07

申请号：US11498180

申请日：2006-08-03

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M3/335

CPC classification number: H02M1/4225 ,  H02M1/34 ,  H02M2001/346 ,  Y02B70/126 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A simple zero current switch circuit includes a first coil set and a second coil set that are wound at a selected coil ratio and bridge electrically an energy storing inductor, an output diode and a conduction switch of a power-factor corrector. The leaking inductance of the first coil set generates a back electromotive force to make the conduction switch in a zero current switching condition. An energy conversion circuit is provided to store reverse energy according to the coil ratio of the second coil set and the first coil set and reclaims the energy to an output capacitor of the power-factor corrector while the output diode generates a reverse recovery condition. Thereby reverse recovery time of the output diode can be shortened.

Abstract translation: 简单的零电流开关电路包括以选定的线圈比率卷绕的第一线圈组和第二线圈组，并将功率因数校正器的能量存储电感器，输出二极管和导通开关电桥连接。 第一线圈组的漏电感产生反电动势，使导通开关处于零电流开关状态。 提供能量转换电路，用于根据第二线圈组和第一线圈组的线圈比来存储反向能量，并且在输出二极管产生反向恢复条件时将功率回收到功率因数校正器的输出电容器。 从而可以缩短输出二极管的反向恢复时间。

公开(公告)号：US07310247B1

公开(公告)日：2007-12-18

申请号：US11605234

申请日：2006-11-29

Applicant: Kuo-Fan Lin ,  Chien-Li Tsai

Inventor： Kuo-Fan Lin ,  Chien-Li Tsai

IPC: H02M3/22 ,  H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: The present invention discloses a method for controlling transformer excitation cycles and a circuit for controlling the same, wherein the excitation cycle and the demagnetization cycle, which determine the rise and fall of the excitation current, are modified to prevent the coil from being saturated. In the present invention, a sense current is acquired from the excitation current of the transformer coil, and a demagnetization reference value is set. The sense current is used to determine whether the excitation current is lowered to the demagnetization reference value in the demagnetization cycle. A cycle modifying circuit is used to modify the duty cycle signal output by a pulse control unit until the excitation current is lowered to a preset level.

Abstract translation: 本发明公开了一种用于控制变压器励磁周期的方法和用于控制变压器励磁循环的电路，其中确定励磁电流的上升和下降的励磁周期和去磁循环被修改以防止线圈饱和。 在本发明中，从变压器线圈的励磁电流获取感测电流，设定退磁基准值。 感测电流用于确定在去磁循环中励磁电流是否降低到去磁参考值。 循环修改电路用于修改由脉冲控制单元输出的占空比信号，直到激励电流降低到预设电平。

公开(公告)号：US20120243275A1

公开(公告)日：2012-09-27

申请号：US13198710

申请日：2011-08-04

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M7/04

CPC classification number: H02M1/4208 ,  Y02B70/126 ,  Y02P80/112

Abstract: A switch control circuit for controlling a first switch element and a second switch element within a bridgeless switching circuit is provided. The bridgeless switching circuit generates an output signal according to an alternating current signal. The switch control circuit includes a current generating element and a phase generating element. The current generating element is for sensing a first current flowing through the first switch element and a second current flowing through the second switch element, and generating a phase comparison result according to the first and the second currents. The phase generating element generates a first control signal and a second control signal according to a power factor correction signal and the phase comparison result to control conducting status of the first and the second switch elements, respectively.

Abstract translation: 提供了一种用于控制无桥开关电路内的第一开关元件和第二开关元件的开关控制电路。 无桥开关电路根据交流信号产生输出信号。 开关控制电路包括电流产生元件和相位产生元件。 电流产生元件用于感测流过第一开关元件的第一电流和流过第二开关元件的第二电流，并且根据第一和第二电流产生相位比较结果。 相位产生元件根据功率因数校正信号和相位比较结果产生第一控制信号和第二控制信号，以分别控制第一和第二开关元件的导通状态。

公开(公告)号：US07907426B2

公开(公告)日：2011-03-15

申请号：US12189419

申请日：2008-08-11

Applicant: Kuo-Fan Lin ,  Chien-Li Tsai

Inventor： Kuo-Fan Lin ,  Chien-Li Tsai

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: A flyback circuit providing synchronized control includes a pulse width modulation (PWM) unit, a synchronized control unit and an ON period limiting unit. The PWM unit generates a driving signal to control a switch ON period of a primary winding and provides a synchronized signal prior to the generation of the driving signal that has output time series ahead the driving signal. The synchronized control unit receives the synchronized signal through an induction winding to set off a synchronized commutation switch. The ON period limiting unit starts a period limiting time series after the synchronized commutation switch has been set on. After the synchronized commutation switch is set off by the synchronized signal the ON period limiting unit is reset to an initial condition. The synchronized commutation switch maintains an ON condition until the period limiting time series end, then the ON period limiting unit generates a forced ending signal to set off the synchronized commutation switch so that the flyback circuit maintains operation at a minimum duty frequency.

Abstract translation: 提供同步控制的反激电路包括脉冲宽度调制（PWM）单元，同步控制单元和导通周期限制单元。 PWM单元产生驱动信号以控制初级绕组的开关导通周期，并且在产生具有在驱动信号之前具有输出时间序列的驱动信号之前提供同步信号。 同步控制单元通过感应线圈接收同步信号，以便设置同步换向开关。 ON周期限制单元在同步换向开关置位之后开始周期限制时间序列。 在通过同步信号设定同步换向开关之后，将ON周期限制单元复位到初始状态。 同步换向开关保持ON状态，直到周期限制时间序列结束为止，则ON周期限制单元产生强制结束信号，以使同步换向开关断开，使得回扫电路以最小占空比维持运行。

公开(公告)号：US07764522B2

公开(公告)日：2010-07-27

申请号：US11812208

申请日：2007-06-15

Applicant: Kuo-Fan Lin

Inventor： Kuo-Fan Lin

IPC: H02M7/5375

CPC classification number: H02M1/36 ,  H02M1/4225 ,  H02M3/33507 ,  Y02B70/126 ,  Y10S323/901

Abstract: The present invention discloses a method and a circuit for controlling a start-up cycle of an integrated circuit in a circuit system. The method and circuit determine whether or not an input power of the circuit system and a bias voltage power of the integrated circuit have reached a normal operating voltage range to control the bias voltage power to produce a start-up cycle of the integrated circuit. The method and circuit also provides a protection mechanism for an overload of the circuit system overload, so that the integrated circuit can moderate surges and prevent damages.

Abstract translation: 本发明公开了一种用于控制电路系统中的集成电路的启动周期的方法和电路。 该方法和电路确定电路系统的输入功率和集成电路的偏置电压功率是否已经达到正常工作电压范围，以控制偏置电压功率以产生集成电路的启动周期。 该方法和电路还为电路系统过载的过载提供保护机制，使集成电路可以缓和浪涌并防止损坏。

公开(公告)号：US20100033995A1

公开(公告)日：2010-02-11

申请号：US12189419

申请日：2008-08-11

Applicant: Kuo-Fan LIN ,  Chien-Li TSAI

Inventor： Kuo-Fan LIN ,  Chien-Li TSAI

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: A flyback circuit providing synchronized control includes a pulse width modulation (PWM) unit, a synchronized control unit and an ON period limiting unit. The PWM unit generates a driving signal to control a switch ON period of a primary winding and provides a synchronized signal prior to the generation of the driving signal that has output time series ahead the driving signal. The synchronized control unit receives the synchronized signal through an induction winding to set off a synchronized commutation switch. The ON period limiting unit starts a period limiting time series after the synchronized commutation switch has been set on. After the synchronized commutation switch is set off by the synchronized signal the ON period limiting unit is reset to an initial condition. The synchronized commutation switch maintains an ON condition until the period limiting time series end, then the ON period limiting unit generates a forced ending signal to set off the synchronized commutation switch so that the flyback circuit maintains operation at a minimum duty frequency.

Abstract translation: 提供同步控制的反激电路包括脉冲宽度调制（PWM）单元，同步控制单元和导通周期限制单元。 PWM单元产生驱动信号以控制初级绕组的开关导通周期，并且在产生具有在驱动信号之前具有输出时间序列的驱动信号之前提供同步信号。 同步控制单元通过感应线圈接收同步信号，以便设置同步换向开关。 ON周期限制单元在同步换向开关置位之后开始周期限制时间序列。 在通过同步信号设定同步换向开关之后，将ON周期限制单元复位到初始状态。 同步换向开关保持ON状态，直到周期限制时间序列结束为止，则ON周期限制单元产生强制结束信号，以使同步换向开关断开，使得回扫电路以最小占空比维持运行。

公开(公告)号：US20090268489A1

公开(公告)日：2009-10-29

申请号：US12110928

申请日：2008-04-28

Applicant: Kuo-Fan Lin ,  Chien-Li Tsui

Inventor： Kuo-Fan Lin ,  Chien-Li Tsui

IPC: H02H7/10

CPC classification number: H02M3/33507 ,  H02M1/34 ,  H02M2001/342 ,  Y02B70/1491

Abstract: A flyback converter having an active snubber includes a transformer to receive input power. The transformer has a primary winding at a first side. The active snubber is coupled in parallel with two ends of the primary winding and has a first circumferential circuit coupling in parallel with the primary winding, a second circumferential circuit and a zero voltage switch unit. The second circumferential circuit is controlled by the zero voltage switch unit and incorporated with the first circumferential circuit to form double damping paths to reduce current and prevent resonance that might otherwise occur to a single circumferential circuit and the secondary side of the transformer.

Abstract translation: 具有主动缓冲器的反激式转换器包括用于接收输入功率的变压器。 变压器在第一侧具有初级绕组。 有源缓冲器与初级绕组的两端并联耦合，并具有与初级绕组并联的第一圆周电路，第二圆周电路和零电压开关单元。 第二圆周电路由零电压开关单元控制并且与第一周向电路结合以形成双重阻尼路径，以减少电流并防止另外可能在变压器的单个周向电路和次级侧发生的共振。

公开(公告)号：US20090028273A1

公开(公告)日：2009-01-29

申请号：US11878886

申请日：2007-07-27

Applicant: Kuo-Fan Lin ,  Chien-Li Tsai

Inventor： Kuo-Fan Lin ,  Chien-Li Tsai

IPC: H04L27/00

CPC classification number: H04L25/4902

Abstract: The present invention discloses a variable-frequency circuit with a compensation mechanism, which comprises: a load sensing/decision unit, a frequency-division unit and a level modulation unit. The present invention applies to a power supply having a frequency-division mode. The power supply has a feedback unit generating a feedback signal. The load sensing/decision unit determines the operational mode according to the feedback signal. The frequency-division unit generates a reference frequency signal. The level modulation unit generates a reference level signal. During frequency variation, the level modulation unit generates a compensation current to modulate the reference level signal. Thereby, the PWM unit of the power supply can adjust the working cycle of the power supply according to the reference frequency signal, the reference level signal and the feedback signal.

Abstract translation: 本发明公开了一种具有补偿机制的可变频率电路，包括：负载感测/判定单元，分频单元和电平调制单元。 本发明适用于具有分频模式的电源。 电源具有产生反馈信号的反馈单元。 负载感测/判定单元根据反馈信号确定操作模式。 分频单元产生参考频率信号。 电平调制单元产生参考电平信号。 在频率变化期间，电平调制单元产生补偿电流以调制参考电平信号。 因此，电源的PWM单元可以根据参考频率信号，参考电平信号和反馈信号来调节电源的工作周期。