公开(公告)号：US08717091B2

公开(公告)日：2014-05-06

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: G05F1/10

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：US08704590B2

公开(公告)日：2014-04-22

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: G05F1/10

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：US10291137B2

公开(公告)日：2019-05-14

申请号：US16040501

申请日：2018-07-19

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chien-Fu Tang ,  Isaac Y. Chen ,  Tzu-Chen Lin ,  Kun-Yu Lin ,  Li-Yang Hsiao ,  Yung-Chih Lai

IPC: H02M3/335 ,  H02M1/36 ,  H02M1/08

Abstract: A flyback power converter includes a transformer having an auxiliary winding for generating an auxiliary voltage and providing a supply voltage on a supply node; a primary side controller circuit which is powered by the supply voltage from the supply node; and a high voltage (HV) start-up circuit. The HV start-up circuit is coupled to an high voltage signal through a HV input terminal and generates the supply voltage through a supply output terminal, wherein when the supply voltage does not exceed a start-up voltage threshold, a HV start-up switch conducts the HV input terminal and the supply output terminal to provide the supply voltage, and when the supply voltage exceeds a start-up voltage threshold, the HV start-up switch is OFF. The HV start-up circuit and the primary side controller circuit are packaged in two separate integrated circuit packages respectively.

公开(公告)号：US20190028033A1

公开(公告)日：2019-01-24

申请号：US16040501

申请日：2018-07-19

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Chien-Fu Tang ,  Isaac Y. Chen ,  Tzu-Chen Lin ,  Kun-Yu Lin ,  Li-Yang Hsiao ,  Yung-Chih Lai

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/36

Abstract: A flyback power converter includes a transformer having an auxiliary winding for generating an auxiliary voltage and providing a supply voltage on a supply node; a primary side controller circuit which is powered by the supply voltage from the supply node; and a high voltage (HV) start-up circuit. The HV start-up circuit is coupled to an high voltage signal through a HV input terminal and generates the supply voltage through a supply output terminal, wherein when the supply voltage does not exceed a start-up voltage threshold, a HV start-up switch conducts the HV input terminal and the supply output terminal to provide the supply voltage, and when the supply voltage exceeds a start-up voltage threshold, the HV start-up switch is OFF. The HV start-up circuit and the primary side controller circuit are packaged in two separate integrated circuit packages respectively.

公开(公告)号：US09257900B2

公开(公告)日：2016-02-09

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: H03M1/00 ,  H02M1/42 ,  H03K23/00 ,  H03K21/38

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。