公开(公告)号：US20080122551A1

公开(公告)日：2008-05-29

申请号：US11609908

申请日：2006-12-13

申请人： Li-Min Lee ,  Chung-Che Yu ,  Chih-Shun Lee

发明人： Li-Min Lee ,  Chung-Che Yu ,  Chih-Shun Lee

IPC分类号： H03K7/08

CPC分类号： H03K7/08 ,  H02M3/156 ,  H03F2200/351

摘要： An apparatus for generating a pulse width modulated (PWM) signal to control a transforming circuit to drive a loading is provided. The apparatus includes an error signal generator, a control circuit and a comparator. The error signal generator includes a first input terminal for receiving a reference voltage, a second input terminal for receiving a feedback signal generated based on an operating state of the loading respectively, and an output terminal for outputting an error status signal. The comparator includes a first input terminal for receiving the error status signal, a second input terminal for receiving a compare signal, and an output terminal for generating the PWM signal. The control circuit determines whether to provide a setting signal coupled to the output terminal of the error signal generator based on at least one control signal.

摘要翻译： 提供一种用于产生脉宽调制（PWM）信号以控制变换电路以驱动负载的装置。 该装置包括误差信号发生器，控制电路和比较器。 误差信号发生器包括用于接收参考电压的第一输入端子，用于分别接收基于负载运行状态产生的反馈信号的第二输入端子和用于输出错误状态信号的输出端子。 比较器包括用于接收误差状态信号的第一输入端子，用于接收比较信号的第二输入端子和用于产生PWM信号的输出端子。 控制电路基于至少一个控制信号来确定是否提供耦合到误差信号发生器的输出端的设置信号。

公开(公告)号：US20080048581A1

公开(公告)日：2008-02-28

申请号：US11625995

申请日：2007-01-23

申请人： Chih-Shun Lee

发明人： Chih-Shun Lee

IPC分类号： H05B41/36

CPC分类号： H05B41/2981

摘要： An electronic ballast comprising a pulse width modulation (PWM) unit and a power-converting unit is provided. The PWM unit is used for generating a PWM signal to the power-converting unit so that the power-converting unit can generate a driving signal to drive and light up the fluorescent lamp according to the PWM signal. Specially, the duty cycle of the PWM signal is varied with time in a pre-heating period of the fluorescent lamp. In addition, the present invention further includes a detecting module for detecting a working voltage and a working current of the fluorescent lamp to determine whether the fluorescent lamp works normally. When the fluorescent lamp cannot work normally, the PWM signal generated by the PWM unit is disabled through the detecting module.

摘要翻译： 提供了包括脉宽调制（PWM）单元和功率转换单元的电子镇流器。 PWM单元用于向功率转换单元产生PWM信号，使得功率转换单元可以产生驱动信号，以根据PWM信号驱动和点亮荧光灯。 特别地，在荧光灯的预热期间，PWM信号的占空比随时间而变化。 此外，本发明还包括检测模块，用于检测荧光灯的工作电压和工作电流，以确定荧光灯是否正常工作。 当荧光灯不能正常工作时，通过检测模块禁止PWM单元产生的PWM信号。

公开(公告)号：US20080061751A1

公开(公告)日：2008-03-13

申请号：US11623175

申请日：2007-01-15

申请人： Chin-Fa Kao ,  Chih-Shun Lee

发明人： Chin-Fa Kao ,  Chih-Shun Lee

IPC分类号： G05F1/00

CPC分类号： H03K17/6871 ,  H02M1/08 ,  H03K17/145 ,  H03K17/6872 ,  H03K17/6874

摘要： A selection device for selecting an output state of a switch device is disclosed. The selection device includes a power source, a rectification element, a driving unit, and a control unit. The switch device includes an upper-arm switch and a lower-arm switch. The power source provides a power signal. The rectification element is coupled to the power source. The driving unit includes a totem circuit coupled to the upper-arm switch and a storage element coupled to the rectification element. The control unit transmits the power signal to the driving unit by the rectification element according to a control signal. The upper-arm switch is driven by the totem circuit to select the output state when the power signal is received by the driving unit.

摘要翻译： 公开了一种用于选择开关装置的输出状态的选择装置。 选择装置包括电源，整流元件，驱动单元和控制单元。 开关装置包括上臂开关和下臂开关。 电源提供电源信号。 整流元件耦合到电源。 驱动单元包括连接到上臂开关的图腾电路和耦合到整流元件的存储元件。 控制单元根据控制信号通过整流元件将功率信号发送到驱动单元。 上臂开关由图腾电路驱动，当驱动单元接收到电源信号时选择输出状态。

公开(公告)号：US20090009152A1

公开(公告)日：2009-01-08

申请号：US12055304

申请日：2008-03-25

申请人： Leaf Chen ,  Chih-Shun Lee

发明人： Leaf Chen ,  Chih-Shun Lee

IPC分类号： G05F3/16

CPC分类号： G05F3/205

摘要： A bias supply, a start-up circuit, and a start-up method for a bias circuit are provided. The bias supply includes the bias circuit, a first switch, a second switch, and a charge storage unit. The first switch is coupled between a first voltage and a node. The first switch determines whether or not to be turned on according to a feedback voltage from the bias circuit. The charge storage unit is coupled between the node and a second voltage. The second switch determines whether or not to output a start-up voltage to the bias circuit according to the voltage of the node. In other words, the present invention utilizes charge/discharge properties of the charge storage unit and the feedback voltage from the bias circuit for controlling whether the second switch outputs a start-up voltage to the bias circuit or not. Therefore, the power consumption of the start-up circuit is decreased.

摘要翻译： 提供偏置电源，启动电路和偏置电路的启动方法。 偏置电源包括偏置电路，第一开关，第二开关和电荷存储单元。 第一开关耦合在第一电压和节点之间。 第一开关根据来自偏置电路的反馈电压来确定是否被接通。 电荷存储单元耦合在节点和第二电压之间。 第二开关根据节点的电压决定是否向偏置电路输出启动电压。 换句话说，本发明利用电荷存储单元的充电/放电特性和来自偏置电路的反馈电压来控制第二开关是否向起动电压输出启动电压。 因此，启动电路的功耗降低。

公开(公告)号：US20090002061A1

公开(公告)日：2009-01-01

申请号：US12052739

申请日：2008-03-21

申请人： Leaf Chen ,  Chih-Shun Lee

发明人： Leaf Chen ,  Chih-Shun Lee

IPC分类号： G05F3/26

CPC分类号： G05F3/205

摘要： A bias supply, a start-up circuit, and a start-up method for a bias circuit are provided. The bias supply includes the bias circuit, an impedance unit, a charge storage unit, and a switch. The impedance unit is coupled between a first voltage and a node. The charge storage unit is coupled between the node and a second voltage. The switch decides whether or not to output a start-up voltage to the bias circuit according to the voltage of the node. In other words, charge/discharge properties of the charge storage unit are utilized for controlling whether the switch outputs a start-up voltage to the bias circuit or not. Therefore, the power consumption of the start-up circuit is decreased.

摘要翻译： 提供偏置电源，启动电路和偏置电路的启动方法。 偏置电源包括偏置电路，阻抗单元，电荷存储单元和开关。 阻抗单元耦合在第一电压和节点之间。 电荷存储单元耦合在节点和第二电压之间。 开关根据节点的电压决定是否向偏置电路输出启动电压。 换句话说，电荷存储单元的充电/放电特性用于控制开关是否向偏置电路输出启动电压。 因此，启动电路的功耗降低。

公开(公告)号：US20080315690A1

公开(公告)日：2008-12-25

申请号：US12040931

申请日：2008-03-03

申请人： Leaf Chen ,  Chih-Shun Lee ,  Chia-Hsin Chen

发明人： Leaf Chen ,  Chih-Shun Lee ,  Chia-Hsin Chen

IPC分类号： H01H47/00

CPC分类号： H03K17/6872 ,  H03K19/0016 ,  H03K2217/0036 ,  Y10T307/76

摘要： An initial circuit is provided. The initial circuit receives a plurality of input signals and controls an initial status of a switching circuit with a plurality of switches. The initial circuit includes a judgment circuit for generating an enable signal according to one of the input signals, and a control circuit for generating a plurality of control signals according to the enable signal and the input signals. The switches are turned off by the control circuit according to the control signals when the switching circuit is in an initial status, and the switches are controlled by the control circuit according to the control signals when the switching circuit is in an operating status.

摘要翻译： 提供初始电路。 初始电路接收多个输入信号，并利用多个开关控制开关电路的初始状态。 初始电路包括用于根据输入信号之一产生使能信号的判断电路，以及根据使能信号和输入信号产生多个控制信号的控制电路。 当开关电路处于初始状态时，开关由控制电路根据控制信号关断，开关由切换电路处于运行状态时根据控制信号由控制电路控制。