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：US20100039839A1

公开(公告)日：2010-02-18

申请号：US12603119

申请日：2009-10-21

Applicant: Kuo-Fan LIN

Inventor： Kuo-Fan LIN

IPC: H02H7/122

CPC classification number: H03K7/08 ,  H02M3/156 ,  H02M3/33507 ,  H02M2001/0016

Abstract: A cycle modulation circuit for limiting voltage peak value of a power supply employed an active clamp. The power supply receives an input power which is modulated through a power driving unit to become a driving power transformed through a transformer to be output. The cycle modulation circuit includes a comparison unit and a linear voltage generation unit. The comparison unit receives the input power to generate a level signal which is used as a base value to compare level with an oscillation signal generated by the linear voltage generation unit, thereby to modulate and output a pulse width limit signal with a composite cycle consisting of a high level and a low level. The pulse width limit signal is input to the power driving unit to limit the peak value of the driving power modulated by the power driving unit.

Abstract translation: 一种用于限制使用有源钳位电源的电压峰值的循环调制电路。 电源接收通过电力驱动单元调制的输入功率，成为通过变压器变换的驱动功率输出。 循环调制电路包括比较单元和线性电压产生单元。 比较单元接收输入功率以产生用作基准值的电平信号，以将电平与线性电压产生单元产生的振荡信号进行比较，从而调制和输出具有复合周期的脉冲宽度限制信号，复合周期由 高水平和低水平。 脉冲宽度限制信号被输入到电力驱动单元，以限制由电力驱动单元调制的驱动功率的峰值。

公开(公告)号：US20110156481A1

公开(公告)日：2011-06-30

申请号：US12648831

申请日：2009-12-29

Applicant: Kuo-Fan LIN ,  Hua-Ming Lu

Inventor： Kuo-Fan LIN ,  Hua-Ming Lu

IPC: H02M3/335

CPC classification number: H02M3/33561 ,  Y10T307/406

Abstract: A post regulation control circuit aims to monitor ancillary output power generated from a power supply. The power supply includes at least one primary output circuit to provide a primary output power. A post regulation circuit obtains the primary output power and regulate to an ancillary output power. The monitor circuit sets an abnormal level and obtains a detection power from the post regulation circuit to compare with the abnormal level. Determining whether to output a driving pulse wave according to the detection power is over the abnormal level or not, or stop outputting the driving pulse wave.

Abstract translation: 后期调节控制电路旨在监测从电源产生的辅助输出功率。 电源包括至少一个主输出电路以提供初级输出功率。 后调节电路获得主输出功率并调节到辅助输出功率。 监视电路设置异常电平，并从后置调整电路获取检测电力，以与异常电平进行比较。 根据检测功率确定是否输出驱动脉搏波是否超过异常水平，否则停止输出驱动脉冲波。