公开(公告)号：US20140268924A1

公开(公告)日：2014-09-18

申请号：US13928974

申请日：2013-06-27

Applicant: Richtek Technology Corporation

Inventor： Chien-Fu TANG ,  Isaac Y. CHEN

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M2001/0025

Abstract: A control circuit of a flyback power converter includes a first reference signal generating circuit for generating a first reference signal; a reference signal adjusting circuit for generating an adjustment signal according to the first reference signal and a test signal corresponding to an output voltage signal of the flyback power converter, and to generate a second reference signal according to the adjustment signal and the first reference signal; an error detection circuit for generating an error signal according to the second reference signal and a feedback signal; and a control signal generating circuit for generating a control signal according to the error signal to control operations of a power switch to thereby adjust the test signal. The feedback signal corresponds to a current flowing through a primary side coil of the power converter or a sensing voltage of an inductive coil of the power converter.

Abstract translation: 回扫功率转换器的控制电路包括：第一参考信号发生电路，用于产生第一参考信号; 参考信号调整电路，用于根据第一参考信号产生调整信号和对应于回扫功率转换器的输出电压信号的测试信号，并根据调整信号和第一参考信号产生第二参考信号; 误差检测电路，用于根据第二参考信号和反馈信号产生误差信号; 以及控制信号发生电路，用于根据误差信号产生控制信号，以控制电源开关的操作，从而调整测试信号。 反馈信号对应于流过功率转换器的初级侧线圈的电流或功率转换器的感应线圈的感测电压。

公开(公告)号：US20140022010A1

公开(公告)日：2014-01-23

申请号：US14032959

申请日：2013-09-20

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chih LAI ,  Isaac Y. CHEN ,  Chien-Fu TANG ,  Jiun-Hung PAN

IPC: G05B21/02

CPC classification number: G05B21/02 ,  H02M3/156 ,  H02M2001/0003

Abstract: A control circuit for a power converter includes a shared pin, a driving circuit, a current source, a sampling circuit, and a signal processing circuit. The shared pin is coupled with an output end of the power converter through a resistor. The driving circuit conducts a switch of the power converter. The current source provides a current to the resistor through the shared pin. The sampling circuit samples the signal on the shared pin for generating a first sampling value and a second sampling value. The signal processing circuit calculates a first difference between the first sampling value and a first reference value, and a second difference between the second sampling value and a second reference value. When the difference between the first difference and the second difference is less than a predetermined value, the signal processing circuit may therefore configure the conduction time or frequency of the switch.

Abstract translation: 用于功率转换器的控制电路包括共享引脚，驱动电路，电流源，采样电路和信号处理电路。 共享引脚通过电阻与功率转换器的输出端耦合。 驱动电路进行功率转换器的开关。 电流源通过共享引脚向电阻提供电流。 采样电路对共享引脚上的信号进行采样，以产生第一采样值和第二采样值。 信号处理电路计算第一采样值和第一参考值之间的第一差值，以及第二采样值和第二参考值之间的第二差值。 当第一差异和第二差异之间的差小于预定值时，信号处理电路可以配置开关的导通时间或频率。

公开(公告)号：US20130342127A1

公开(公告)日：2013-12-26

申请号：US13926538

申请日：2013-06-25

Applicant: Richtek Technology Corporation

Inventor： Jiun-Hung PAN ,  Chien-Fu TANG ,  Isaac Y. CHEN ,  Tsung-Hsi YANG

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827

Abstract: An LED control device for configuring a phase-cut dimming system includes an LED and a switch. The LED control device configures the conduction status of the switch so as to supply power to the LED according to an input signal. The LED control device further detects whether the input signal is phase-cut. When the input signal is phase-cut, the LED control device stores the signal values of the internal circuits. Afterward, when the input signal is not phase-cut, the LED control device restores the stored signal values so that the internal circuits may resume to the previous operation status rapidly.

Abstract translation: 用于配置相位调光系统的LED控制装置包括LED和开关。 LED控制装置配置开关的导通状态，以根据输入信号向LED供电。 LED控制装置还检测输入信号是否被切断。 当输入信号为相位切断时，LED控制装置存储内部电路的信号值。 之后，当输入信号不是相位切断时，LED控制装置恢复存储的信号值，使得内部电路可以快速恢复到先前的操作状态。

公开(公告)号：US20130234790A1

公开(公告)日：2013-09-12

申请号：US13796547

申请日：2013-03-12

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yung-Chih LAI ,  Isaac Y. CHEN ,  Chien-Fu TANG ,  Jiun-Hung PAN

IPC: G05B21/02

CPC classification number: G05B21/02 ,  H02M3/156 ,  H02M2001/0003

Abstract: A control circuit for a power converter is disclosed, having a shared pin, a driving circuit, a current source, a sampling circuit, and a signal processing circuit. The shared pin is used for coupling with an output end of the power converter through a resistor. The driving circuit is used for conducting a switch of the power converter. The current source provides a current to the resistor through the shared pin. The sampling circuit samples the signal on the shared pin for generating a first sampling value and a second sampling value. When the difference between the first sampling value and the second sampling value is less than a predetermined value, the signal processing circuit configures the driving circuit to adjust at least one of the conduction time and the conduction frequency of the switch according to an output signal of the power converter received from the shared pin.

Abstract translation: 公开了一种用于功率转换器的控制电路，其具有共享引脚，驱动电路，电流源，采样电路和信号处理电路。 共享引脚用于通过电阻与功率转换器的输出端耦合。 驱动电路用于导通电源转换器的开关。 电流源通过共享引脚向电阻提供电流。 采样电路对共享引脚上的信号进行采样，以产生第一采样值和第二采样值。 当第一采样值和第二采样值之间的差小于预定值时，信号处理电路将驱动电路配置为根据输入信号的输入信号调整开关的导通时间和导通频率中的至少一个 从共享引脚接收功率转换器。

公开(公告)号：US20130176758A1

公开(公告)日：2013-07-11

申请号：US13735652

申请日：2013-01-07

Applicant: Richtek Technology Corporation

Inventor： Pei-Kai TSENG ,  Jyun-Che HO ,  Chien-Fu TANG ,  Isaac Y. CHEN

IPC: H02M7/219

CPC classification number: H02M7/219 ,  H02M2007/2195 ,  Y02B70/1408

Abstract: A bridge rectifier is established by MOSFETs instead of diodes. The MOSFET bridge rectifier includes a voltage detector to detect the voltages of two AC input terminals of the MOSFET bridge rectifier, for identifying the positive and negative half cycles of an AC voltage input to the MOSFET bridge rectifier, thereby accurately controlling the MOSFETs.

Abstract translation: 由MOSFET代替二极管建立桥式整流器。 MOSFET桥式整流器包括用于检测MOSFET桥式整流器的两个AC输入端子的电压的电压检测器，用于识别输入到MOSFET桥式整流器的AC电压的正半周期和负半周期，从而精确地控制MOSFET。

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.

公开(公告)号：US20160308449A1

公开(公告)日：2016-10-20

申请号：US15192187

申请日：2016-06-24

Applicant: Richtek Technology Corporation

Inventor： Jiun-Hung PAN ,  Chien-Fu TANG ,  Jyun-Che HO ,  Isaac Y. CHEN ,  Yu-Chang CHEN ,  Jung-Pei CHENG

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/156 ,  H02M3/157 ,  H02M3/33515 ,  H02M3/33523 ,  H02M7/217 ,  H02M2001/0009

Abstract: An AC-to-DC power converter with a BJT as a power switch can set a base current of the BJT by a current setting resistor which is in the outside of a control integrated circuit. Since an output current and a recovery current of the BJT are injected into a sensing resistor, the AC-to-DC power converter can correctly detect an inductor current thereof from the sensing resistor.

Abstract translation: 具有BJT作为电源开关的AC至DC电力转换器可以通过位于控制集成电路外部的电流设定电阻来设定BJT的基极电流。 由于BJT的输出电流和恢复电流被注入到感测电阻器中，所以AC到DC功率转换器可以从感测电阻器正确地检测其电感电流。

公开(公告)号：US20140117947A1

公开(公告)日：2014-05-01

申请号：US14061317

申请日：2013-10-23

Applicant: Richtek Technology Corporation

Inventor： Yung-Chih LAI ,  Jyun-Che HO ,  Isaac Y. CHEN

IPC: H02M1/42 ,  H03K23/00

CPC classification number: H02M1/42 ,  H02M1/4225 ,  H03K21/38 ,  H03K23/00 ,  Y02B70/12 ,  Y02B70/126 ,  Y02P80/112

Abstract: A control integrated circuit for a power factor correction converter has a pin for detecting an alternating-current information and a direct-current information of an input signal. The control integrated circuit comprises a signal peak detector for detecting a peak value of the input signal to the pin to obtain the direct-current information of the input signal. Since the alternating-current information and the direct-current information of the input signal can be obtained through the same pin, the pin count of the control integrated circuit can be decreased.

Abstract translation: 用于功率因数校正转换器的控制集成电路具有用于检测交流信息和输入信号的直流信息的引脚。 控制集成电路包括信号峰值检测器，用于检测针对输入信号的峰值，以获得输入信号的直流信息。 由于可以通过相同的引脚获得输入信号的交流信息和直流信息，所以可以减小控制集成电路的引脚数。

公开(公告)号：US20160353534A1

公开(公告)日：2016-12-01

申请号：US15155857

申请日：2016-05-16

Applicant: Richtek Technology Corporation

Inventor： Jiun-Hung PAN ,  Tong-Cheng JAO ,  Yi-Wei LEE ,  Isaac Y. CHEN

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0842 ,  H05B33/0845

Abstract: A driver circuit of a LED luminance device includes: a signal pin; a determining circuit for determining the magnitude of an input signal; an indication signal generating circuit for outputting an indication signal to the signal pin according to the determining result of the determining circuit; an alignment signal generating circuit for generating an alignment signal when triggered by a predetermined edge of a signal at the signal pin; an indication signal detecting circuit for detecting the signal at the signal pin to generate a detection signal; and a control signal generating circuit for generating multiple control signals according to the detection signal to respectively control multiple switching elements in parallel connection with multiple LED devices when triggered by the alignment signal.

Abstract translation: LED亮度装置的驱动电路包括：信号引脚; 用于确定输入信号的大小的确定电路; 指示信号发生电路，用于根据确定电路的确定结果向信号引脚输出指示信号; 对准信号发生电路，用于当由信号引脚上的信号的预定边沿触发时产生对准信号; 指示信号检测电路，用于检测信号引脚处的信号以产生检测信号; 以及控制信号发生电路，用于根据检测信号产生多个控制信号，以在由对准信号触发时分别控制与多个LED器件并联连接的多个开关元件。

公开(公告)号：US20160242245A1

公开(公告)日：2016-08-18

申请号：US15018309

申请日：2016-02-08

Applicant: Richtek Technology Corporation

Inventor： Tong-Cheng JAO ,  Yi-Wei LEE ,  Jiun-Hung PAN ,  Isaac Y. CHEN

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/083

Abstract: A linear LED driver includes a voltage supply terminal providing a driving voltage, at least one first transistor, each of which has an input terminal coupled to a respective LED, and a bleeder circuit. When the voltage of the output terminal of each of the at least one first transistor is lower than a first threshold and a power voltage is higher than a second threshold, the bleeder circuit will generate a bleeder current to discharge the voltage supply terminal so as to prevent the LEDs from flickering. The bleeder circuit detects the voltage of the output terminal of each of the at least one first transistor. Therefore, whether the LEDs are lighted up can be confirmed so that the bleeder current can be provided at properly time point.

Abstract translation: 线性LED驱动器包括提供驱动电压的电压供应端子，至少一个第一晶体管，每个第一晶体管具有耦合到相应LED的输入端子和泄放电路。 当所述至少一个第一晶体管中的每一个的输出端子的电压低于第一阈值并且电源电压高于第二阈值时，所述泄放电路将产生泄放电流以对所述电压供应端子进行放电，以便 防止LED闪烁。 泄放电路检测至少一个第一晶体管中的每一个的输出端子的电压。 因此，可以确认LED是否点亮，从而可以在正确的时间点设置泄放电流。