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6 条记录 (耗时 0.012 秒)

    DRIVING CIRCUIT FOR DRIVING A LED ARRAY
    3.
    发明申请
    DRIVING CIRCUIT FOR DRIVING A LED ARRAY 有权
    驱动电路驱动LED阵列

    公开(公告)号：US20160278172A1

    公开(公告)日：2016-09-22

    申请号：US15047154

    申请日：2016-02-18

    申请人： Richtek Technology Corporation

    发明人： Chang-Yu WU ,  Wei-Ming CHIU

    IPC分类号： H05B33/08

    CPC分类号： H05B33/0815 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0842 ,  H05B33/0857 ,  H05B33/0887 ,  Y02B20/341

    摘要： A control chip of a driving circuit for driving a LED array shares a ground terminal with the LED array so that, without an additional winding, the driving circuit can provide a supply voltage for the control chip, implement a zero-current switching function, and implement an over-voltage protection function. Since no additional windings are needed, the related costs and the size of the driving circuit are decreased.

    摘要翻译： 用于驱动LED阵列的驱动电路的控制芯片与LED阵列共享接地端子，使得在没有附加绕组的情况下，驱动电路可以为控制芯片提供电源电压，实现零电流切换功能，以及 实现过电压保护功能。 由于不需要额外的绕组，相关成本和驱动电路的尺寸减小。

    AC-TO-DC POWER CONVERTER AND RELATED CONTROL CIRCUITS
    5.
    发明申请
    AC-TO-DC POWER CONVERTER AND RELATED CONTROL CIRCUITS 审中-公开

    公开(公告)号：US20170222566A1

    公开(公告)日：2017-08-03

    申请号：US15415360

    申请日：2017-01-25

    申请人： Richtek Technology Corporation

    发明人： Chang-Yu WU ,  Tzu-Chen LIN

    IPC分类号： H02M3/335

    CPC分类号： H02M3/33569 ,  H02M1/15 ,  H02M3/005 ,  H02M3/1582 ,  H02M3/3353 ,  H02M7/04 ,  H02M2001/007

    摘要： An AC-to-DC power converter includes a rectifier for generating a rectified voltage based on an AC voltage; an input capacitor coupled between the rectifier and a fixed-voltage terminal; a first inductive element; a first auxiliary capacitor; a first switch coupled between the input capacitor and the first inductive element; a second switch coupled between the first inductive element and the fixed-voltage terminal; a circuitry node; an auxiliary switch for coupling between the circuitry node and the first auxiliary capacitor or between the first auxiliary capacitor and the fixed-voltage terminal; a first diode; a second diode; a control signal generating circuit for controlling the first switch and the second switch; and an auxiliary switch control circuit for controlling the auxiliary switch.

    POWER FACTOR CORRECTION CIRCUIT OF POWER CONVERTER
    6.
    发明申请
    POWER FACTOR CORRECTION CIRCUIT OF POWER CONVERTER 有权
    功率转换器功率因数校正电路

    公开(公告)号：US20150162821A1

    公开(公告)日：2015-06-11

    申请号：US14547870

    申请日：2014-11-19

    申请人： Richtek Technology Corporation

    发明人： Chang-Yu WU ,  Tzu-Chen LIN

    IPC分类号： H02M1/42 ,  H02M3/335

    CPC分类号： H02M3/33507 ,  H02M1/083 ,  H02M1/12 ,  H02M1/42 ,  H02M1/4225 ,  H02M1/4258 ,  H02M2001/0009 ,  Y02B70/126 ,  Y02P80/112

    摘要： A power factor correction (PFC) circuit of a power converter is disclosed. The power converter includes a primary side coil, a secondary side coil, an inductive coil, and a power switch. The PFC circuit includes a zero current detection circuit for detecting an inductive signal of the inductive coil to generate a detection signal; an error detection circuit for generating an error signal corresponding to an output voltage signal or an output current signal according to a reference signal; a ramp signal generating circuit for generating a ramp signal; a comparison circuit for comparing the ramp signal with the error signal to generate a comparison signal; and a trigger circuit for generating a control signal to control the power switch and for controlling the ramp signal generating circuit to adjust a slope of the ramp signal according to the detection signal and the comparison signal.

    摘要翻译： 公开了功率转换器的功率因数校正（PFC）电路。 功率转换器包括初级侧线圈，次级侧线圈，感应线圈和电源开关。 PFC电路包括用于检测感应线圈的感应信号以产生检测信号的零电流检测电路; 误差检测电路，用于根据参考信号产生对应于输出电压信号或输出电流信号的误差信号; 用于产生斜坡信号的斜坡信号发生电路; 比较电路，用于将斜坡信号与误差信号进行比较以产生比较信号; 以及触发电路，用于产生控制信号以控制电源开关并控制斜坡信号发生电路，以根据检测信号和比较信号调整斜坡信号的斜率。