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    ADAPTIVE BUCK CONVERTER WITH MONITOR CIRCUIT AND CHARGING CABLE USING THE SAME
    2.
    发明申请
    ADAPTIVE BUCK CONVERTER WITH MONITOR CIRCUIT AND CHARGING CABLE USING THE SAME 审中-公开

    公开(公告)号：US20180233937A1

    公开(公告)日：2018-08-16

    申请号：US15951759

    申请日：2018-04-12

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Ta-Yung YANG ,  Jing-Meng LIU ,  Isaac Y. CHEN ,  Tzu-Chen LIN

    IPC: H02J7/00 ,  H02M3/158

    CPC classification number: H02J7/0052 ,  H02J7/0068 ,  H02J7/0091 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02M3/1582

    Abstract: An adaptive buck converter of a charging cable includes: a power receiving interface for receiving a DC voltage and a cable current from a cable; a terminal communication interface for transmitting a charging voltage and a charging current to a connection terminal of the charging cable and for receiving a communication signal generated by a mobile device from the connection terminal; a power converting circuit for receiving the DC voltage and the cable current from the power receiving interface and for generating the charging voltage and the charging current; a monitor circuit arranged to operably detect the DC voltage or the cable current; and a data processing circuit configured for controlling the power converting circuit according to the communication signal. The data processing circuit further communicates with the mobile device through the terminal communication interface and the connection terminal in response to a detection result of the monitor circuit.

    AC-TO-DC POWER CONVERTER AND RELATED CONTROL CIRCUITS
    6.
    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

    Applicant: Richtek Technology Corporation

    Inventor： Chang-Yu WU ,  Tzu-Chen LIN

    IPC: H02M3/335

    CPC classification number: H02M3/33569 ,  H02M1/15 ,  H02M3/005 ,  H02M3/1582 ,  H02M3/3353 ,  H02M7/04 ,  H02M2001/007

    Abstract: 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.

    ADAPTIVE BUCK CONVERTER AND CHARGING CABLE USING THE SAME
    7.
    发明申请
    ADAPTIVE BUCK CONVERTER AND CHARGING CABLE USING THE SAME 有权

    公开(公告)号：US20170201107A1

    公开(公告)日：2017-07-13

    申请号：US15013459

    申请日：2016-02-02

    Applicant: Richtek Technology Corporation

    Inventor： Ta-Yung YANG ,  Jing-Meng LIU ,  Isaac Y. CHEN ,  Tzu-Chen LIN

    IPC: H02J7/00

    CPC classification number: H02J7/0044 ,  G06F1/266 ,  H02J7/0042 ,  H02J7/0052 ,  H02J7/0055 ,  H02J7/007 ,  H02J7/0072 ,  H02J2007/0059 ,  H02J2007/0062

    Abstract: An adaptive buck converter of a charging cable includes: a power receiving interface for receiving a DC voltage and a cable current from a cable; a terminal communication interface for transmitting a charging voltage and a charging current to a connection terminal of the charging cable and for receiving a communication signal generated by the mobile device from the connection terminal; a power converting circuit for receiving the DC voltage and the cable current from the power receiving interface and for generating the charging voltage and the charging current, wherein the charging voltage is lower than the DC voltage while the charging current is greater than the cable current; and a data processing circuit coupled with the power converting circuit and configured for controlling the power converting circuit according to the communication signal.

    POWER FACTOR CORRECTION CIRCUIT OF POWER CONVERTER
    8.
    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

    Applicant: Richtek Technology Corporation

    Inventor： Chang-Yu WU ,  Tzu-Chen LIN

    IPC: H02M1/42 ,  H02M3/335

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

    Abstract: 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.

    Abstract translation: 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。

    ACTIVE POWER FACTOR CORRECTION CIRCUIT AND RELATED PFC CONTROLLER
    9.
    发明申请
    ACTIVE POWER FACTOR CORRECTION CIRCUIT AND RELATED PFC CONTROLLER 有权
    有功功率因数校正电路及相关PFC控制器

    公开(公告)号：US20130121047A1

    公开(公告)日：2013-05-16

    申请号：US13661892

    申请日：2012-10-26

    Applicant: RICHTEK TECHNOLOGY CORPORATION

    Inventor： Tzu-Chen LIN

    IPC: H02M7/04

    CPC classification number: H02M1/4225 ,  H02M2001/0022 ,  H02M2001/0025 ,  Y02B70/126 ,  Y02P80/112

    Abstract: An active power factor correction (PFC) circuit for calibrating a power factor of an AC-to-DC converter when the active PFC circuit is coupled with the AC-to-DC converter is disclosed including: a piecewise linear gain circuit, an error amplifier, a PWM controller, and a PWM signal generator. The piecewise linear gain circuit is for receiving a feed forward signal and generating a corresponding gain signal, wherein the gain signal and the feed forward signal have a broken line relation with respect to magnitude. The error amplifier is for generating an error signal according to an output voltage of the AC-to-DC converter. The PWM controller is for generating a control signal according to the gain signal and the error signal. The PWM signal generator is for generating a PWM signal for controlling a power switch of the AC-to-DC converter according to the control signal.

    Abstract translation: 公开了一种用于在有源PFC电路与AC-DC转换器耦合时校准AC-DC转换器的功率因数的有功功率因数校正（PFC）电路，包括：分段线性增益电路，误差放大器 ，PWM控制器和PWM信号发生器。 分段线性增益电路用于接收前馈信号并产生相应的增益信号，其中增益信号和前馈信号相对于幅度具有虚线关系。 误差放大器用于根据AC-DC转换器的输出电压产生误差信号。 PWM控制器用于根据增益信号和误差信号产生控制信号。 PWM信号发生器用于根据控制信号产生用于控制AC-DC转换器的电源开关的PWM信号。

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