利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.036 秒)

    Methods and Circuits for LED Drivers and for PWM Dimming Controls
    3.
    发明申请
    Methods and Circuits for LED Drivers and for PWM Dimming Controls 失效
    LED驱动器和PWM调光控制的方法和电路

    公开(公告)号：US20100289424A1

    公开(公告)日：2010-11-18

    申请号：US12620589

    申请日：2009-11-17

    申请人： Ronald Chang ,  Chin-Chi Chang ,  Chung-Kuang Huang

    发明人： Ronald Chang ,  Chin-Chi Chang ,  Chung-Kuang Huang

    IPC分类号： H05B37/02 ,  G05F1/46

    CPC分类号： H05B33/0818 ,  G09G3/3413 ,  G09G3/342 ,  G09G2310/024 ,  G09G2320/064 ,  G09G2320/0693 ,  G09G2330/021 ,  H05B33/0827

    摘要： The present invention relates to methods for LED driver applications, comprising the steps: providing an input voltage, Vin; generating an output voltage, Vout, for driving a plurality of LED channels, wherein a boost converter is used to convert the input voltage Vin to the output voltage Vout; determining a lowest voltage, VLVS, from the LED channels; generating a comparator voltage, Vcomp, by comparing the lowest voltage of the channels, VLVS, with a feedback reference voltage, VFBREF, wherein the feedback reference voltage, VFBREF, and a LED current, ILED, for the LED channels are determined by a current ISET; generating a summed voltage, Vsum, for stabilizing the output voltage, Vout; and generating a PWM voltage, VPWM, as a function of the Vcomp and the Vsum to control the output voltage, Vout.

    摘要翻译： 本发明涉及LED驱动器应用的方法，包括以下步骤：提供输入电压Vin; 产生用于驱动多个LED通道的输出电压Vout，其中使用升压转换器将输入电压Vin转换为输出电压Vout; 从LED通道确定最低电压VLVS; 通过将通道的最低电压VLVS与反馈参考电压VFBREF进行比较来产生比较器电压Vcomp，其中用于LED通道的反馈参考电压VFBREF和LED电流ILED由电流确定 我设置; 产生用于稳定输出电压Vout的总和电压Vsum; 并产生作为V comp和Vsum的函数的PWM电压VPWM，以控制输出电压Vout。

    Methods and circuits for LED drivers and for PWM dimming controls
    4.
    发明授权
    Methods and circuits for LED drivers and for PWM dimming controls 失效
    LED驱动器和PWM调光控制的方法和电路

    公开(公告)号：US08390262B2

    公开(公告)日：2013-03-05

    申请号：US12620589

    申请日：2009-11-17

    申请人： Ronald Chang ,  Chin-Chi Chang ,  Chung-Kuang Huang

    发明人： Ronald Chang ,  Chin-Chi Chang ,  Chung-Kuang Huang

    IPC分类号： G05F1/00

    CPC分类号： H05B33/0818 ,  G09G3/3413 ,  G09G3/342 ,  G09G2310/024 ,  G09G2320/064 ,  G09G2320/0693 ,  G09G2330/021 ,  H05B33/0827

    摘要： The present invention relates to methods for LED driver applications, comprising the steps: providing an input voltage, Vin; generating an output voltage, Vout, for driving a plurality of LED channels, wherein a boost converter is used to convert the input voltage Vin to the output voltage Vout; determining a lowest voltage, VLVS, from the LED channels; generating a comparator voltage, Vcomp, by comparing the lowest voltage of the channels, VLVS, with a feedback reference voltage, VFBREF, wherein the feedback reference voltage, VFBREF, and a LED current, ILED, for the LED channels are determined by a current ISET; generating a summed voltage, Vsum, for stabilizing the output voltage, Vout; and generating a PWM voltage, VPWM, as a function of the Vcomp and the Vsum to control the output voltage, Vout.

    摘要翻译： 本发明涉及LED驱动器应用的方法，包括以下步骤：提供输入电压Vin; 产生用于驱动多个LED通道的输出电压Vout，其中使用升压转换器将输入电压Vin转换为输出电压Vout; 从LED通道确定最低电压VLVS; 通过将通道的最低电压VLVS与反馈参考电压VFBREF进行比较来产生比较器电压Vcomp，其中用于LED通道的反馈参考电压VFBREF和LED电流ILED由电流确定 我设置; 产生用于稳定输出电压Vout的总和电压Vsum; 并产生作为V comp和Vsum的函数的PWM电压VPWM，以控制输出电压Vout。