公开(公告)号：US20090315473A1

公开(公告)日：2009-12-24

申请号：US12238455

申请日：2008-09-26

申请人： Ming-Heng Tsai ,  Yi-Chung Chou

发明人： Ming-Heng Tsai ,  Yi-Chung Chou

IPC分类号： H05B41/36 ,  H05B37/02

CPC分类号： H05B33/0815

摘要： A light-emitting device driving circuit and a method thereof are provided. A terminal of a light-emitting device is coupled to a supply voltage and a cathode of a diode via an inductor, and the other terminal is coupled to an anode of the diode. The light-emitting device driving circuit includes a switch, a current-sensing circuit, and a switch control circuit. The current-sensing circuit is coupled to the anode of the diode via the switch to determine whether or not to generate a turning-off control signal according to a conducting-current value of the switch. The switch control circuit controls an on/off state of the switch, and turns off the switch according to the turning-off control signal. Besides, the switch control circuit compares the conducting-current value with a reference-current value to generate a comparing result to dynamically adjust a time length of turning off the switch accordingly.

摘要翻译： 提供一种发光器件驱动电路及其方法。 发光器件的端子通过电感器耦合到二极管的电源电压和阴极，而另一个端子耦合到二极管的阳极。 发光装置驱动电路包括开关，电流检测电路和开关控制电路。 电流检测电路经由开关耦合到二极管的阳极，以根据开关的导通电流值来确定是否产生关断控制信号。 开关控制电路控制开关的接通/断开状态，并根据关断控制信号关断开关。 此外，开关控制电路将导通电流值与基准电流值进行比较，以产生比较结果，以动态地调整关断开关的时间长度。

公开(公告)号：US08098027B2

公开(公告)日：2012-01-17

申请号：US12238455

申请日：2008-09-26

申请人： Ming-Heng Tsai ,  Yi-Chung Chou

发明人： Ming-Heng Tsai ,  Yi-Chung Chou

IPC分类号： G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B37/00 ,  H05B39/00 ,  H05B39/02 ,  H05B41/00

CPC分类号： H05B33/0815

摘要： A light-emitting device driving circuit and a method thereof are provided. A terminal of a light-emitting device is coupled to a supply voltage and a cathode of a diode via an inductor, and the other terminal is coupled to an anode of the diode. The light-emitting device driving circuit includes a switch, a current-sensing circuit, and a switch control circuit. The current-sensing circuit is coupled to the anode of the diode via the switch to determine whether or not to generate a turning-off control signal according to a conducting-current value of the switch. The switch control circuit controls an on/off state of the switch, and turns off the switch according to the turning-off control signal. Besides, the switch control circuit compares the conducting-current value with a reference-current value to generate a comparing result to dynamically adjust a time length of turning off the switch accordingly.

摘要翻译： 提供一种发光器件驱动电路及其方法。 发光器件的端子通过电感器耦合到二极管的电源电压和阴极，而另一个端子耦合到二极管的阳极。 发光器件驱动电路包括开关，电流检测电路和开关控制电路。 电流感测电路经由开关耦合到二极管的阳极，以根据开关的导通电流值来确定是否产生关断控制信号。 开关控制电路控制开关的开/关状态，并根据关断控制信号关断开关。 此外，开关控制电路将导通电流值与基准电流值进行比较，生成比较结果，动态地调整关断开关的时间长度。

公开(公告)号：US20110127985A1

公开(公告)日：2011-06-02

申请号：US12725465

申请日：2010-03-17

申请人： Ming-Heng Tsai ,  Yi-Chung Chou

发明人： Ming-Heng Tsai ,  Yi-Chung Chou

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M1/44

摘要： A voltage converting apparatus is disclosed. The voltage converting apparatus mentioned above includes an error comparator. The error comparator receives a feedback voltage and a reference voltage and generates a control signal according to the feedback voltage and the reference voltage. Moreover, the error comparator includes a differential pair, a first current source, and an offset voltage controlling circuit. The offset voltage controlling circuit receives a ramp enabling signal and adjusts a bias current flowing through at least one of a first and a second output terminal of the differential pair according to the ramp enabling signal.

摘要翻译： 公开了电压转换装置。 上述电压转换装置包括误差比较器。 误差比较器接收反馈电压和参考电压，并根据反馈电压和参考电压产生控制信号。 此外，误差比较器包括差分对，第一电流源和偏移电压控制电路。 偏移电压控制电路接收斜坡使能信号并且根据斜坡使能信号来调节流过差分对的第一和第二输出端中的至少一个的偏置电流。