公开(公告)号：US20160069938A1

公开(公告)日：2016-03-10

申请号：US14822382

申请日：2015-08-10

Applicant: Richtek Technology Corporation

Inventor： Hsin-Yi WU ,  Chien-Fu TANG ,  Isaac Y. CHEN

IPC: G01R19/165 ,  H02H3/087 ,  H02M1/32

CPC classification number: G01R19/165 ,  H02M1/32 ,  H02M1/4258 ,  H02M3/33507 ,  H02M7/217 ,  Y02B70/126

Abstract: A parameter setting and circuit protecting method applied in a power converter are disclosed. An input voltage of the power converter is detected to generate a first detecting signal related to the input voltage. The first detecting signal will be thence compared with a threshold so as to generate a protecting signal for protecting the power converter. When a parameter setting signal is triggered, a current is provided so as to make the first detecting signal to generate a variation, thereby setting a parameter in accordance with the variation.

Abstract translation: 公开了一种应用在功率转换器中的参数设置和电路保护方法。 检测功率转换器的输入电压以产生与输入电压相关的第一检测信号。 第一检测信号将与阈值进行比较，以产生用于保护功率转换器的保护信号。 当触发参数设定信号时，提供电流，使第一检测信号产生变化，从而根据变化设定参数。

公开(公告)号：US20170005647A1

公开(公告)日：2017-01-05

申请号：US15267454

申请日：2016-09-16

Applicant: Richtek Technology Corporation

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

IPC: H03K7/08 ,  H02M1/44 ,  H02M1/08 ,  H02M3/335

CPC classification number: H03K7/08 ,  H02M1/08 ,  H02M1/44 ,  H02M3/156 ,  H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/33546 ,  H02M2001/0009 ,  H02M2003/1566 ,  H03K2005/00019

Abstract: A frequency jittering control circuit for a PFM power supply includes a pulse frequency modulator to generate a frequency jittering control signal to switch a power switch to generate an output voltage. The frequency jittering control circuit jitters an input signal or an on-time or off-time of the pulse frequency modulator to jitter the switching frequency of the power switch to thereby improve EMI issue.

Abstract translation: 用于PFM电源的频率抖动控制电路包括脉冲频率调制器，用于产生频率抖动控制信号以切换电源开关以产生输出电压。 频率抖动控制电路使脉冲频率调制器的输入信号或导通时间或关断时间抖动，以抖动电源开关的开关频率，从而改善EMI问题。

公开(公告)号：US20140253185A1

公开(公告)日：2014-09-11

申请号：US14285038

申请日：2014-05-22

Applicant: Richtek Technology Corporation

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

IPC: H03K3/013 ,  H03L5/00

CPC classification number: H03K3/013 ,  H03K19/00361 ,  H03K19/018507 ,  H03L5/00

Abstract: A floating gate driver uses a single-end level shifter to translate a set signal and a reset signal induced by a rising edge and a falling edge of a switch signal to a common output terminal to generate an output voltage for a bistable circuit to generate a level shifted switch signal. Under control of a well transient detect signal asserted by detecting noise in the output voltage, a masking circuit between the single-end level shifter and the bistable circuit masks noise in the output voltage. This configuration has lower area penalty and better noise immunity.

Abstract translation: 浮动栅极驱动器使用单端电平转换器将设置信号和由开关信号的上升沿和下降沿引起的复位信号转换为公共输出端，以产生双稳态电路的输出电压，以产生 电平转换开关信号。 在通过检测输出电压中的噪声所确定的良好瞬态检测信号的控制下，单端电平转换器和双稳态电路之间的屏蔽电路屏蔽输出电压中的噪声。 该配置具有较低的面积损失和更好的抗噪声能力。

公开(公告)号：US20130207704A1

公开(公告)日：2013-08-15

申请号：US13761825

申请日：2013-02-07

Applicant: Richtek Technology Corporation

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

IPC: H03K3/013

CPC classification number: H03K3/013 ,  H03K19/00361 ,  H03K19/018507 ,  H03L5/00

Abstract: A floating gate driver uses a single-end level shifter to translate a set signal and a reset signal induced by a rising edge and a falling edge of a switch signal to a common output terminal to generate an output voltage for a bistable circuit to generate a level shifted switch signal. Under control of a well transient detect signal asserted by detecting noise in the output voltage, a masking circuit between the single-end level shifter and the bistable circuit masks noise in the output voltage. This configuration has lower area penalty and better noise immunity.

Abstract translation: 浮动栅极驱动器使用单端电平转换器将设置信号和由开关信号的上升沿和下降沿引起的复位信号转换为公共输出端，以产生双稳态电路的输出电压，以产生 电平转换开关信号。 在通过检测输出电压中的噪声所确定的良好瞬态检测信号的控制下，单端电平转换器和双稳态电路之间的屏蔽电路屏蔽输出电压中的噪声。 该配置具有较低的面积损失和更好的抗噪声能力。

公开(公告)号：US20130113450A1

公开(公告)日：2013-05-09

申请号：US13672125

申请日：2012-11-08

Applicant: Richtek Technology Corporation

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

IPC: G05F1/10

CPC classification number: G05F1/10 ,  H02M1/00 ,  H02M2001/0025 ,  Y02B70/126

Abstract: A mixed mode compensation circuit and method for a power converter generate a digital signal according to a reference value and a feedback signal which is related to the output voltage of the power converter, convert the digital signal into a first analog signal, offset the first analog signal with a variable offset value to generate a second analog signal, and filter out high-frequency components of the second analog signal to generate a third analog signal for stable output voltage of the power converter. The mixed mode compensation does not require large capacitors, and thus the circuit can be integrated into an integrated circuit.

Abstract translation: 用于功率转换器的混合模式补偿电路和方法根据参考值和与功率转换器的输出电压相关的反馈信号产生数字信号，将数字信号转换成第一模拟信号，偏移第一模拟信号 具有可变偏移值的信号以产生第二模拟信号，并且滤除第二模拟信号的高频分量以产生用于功率转换器的稳定输出电压的第三模拟信号。 混合模式补偿不需要大电容，因此电路可以集成到集成电路中。

公开(公告)号：US20150162843A1

公开(公告)日：2015-06-11

申请号：US14560774

申请日：2014-12-04

Applicant: Richtek Technology Corporation

Inventor： Isaac Y. CHEN ,  Chien-Fu TANG ,  Hsin-Yi WU

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M1/32 ,  H02M2001/0022

Abstract: A control circuit for a power converting circuit includes a multifunctional pin, a pulse-width-modulation (PWM) signal generating circuit, a voltage detecting circuit and a zero current detecting circuit. The voltage detecting circuit detects a signal on the multifunctional pin. When the signal on the multifunctional pin is greater than a predetermined value, the voltage detecting circuit configures the PWM signal generating circuit to intermittently conduct a current switch of the power converting circuit. The zero current detecting circuit detects the signal of the multifunctional pin to determine the conduction status of the current switch. When the signal of the multifunctional pin is less than the predetermined value, the voltage detecting circuit configures the PWM signal generating circuit to turn off the current switch.

Abstract translation: 电力转换电路的控制电路包括多功能引脚，脉冲宽度调制（PWM）信号发生电路，电压检测电路和零电流检测电路。 电压检测电路检测多功能引脚上的信号。 当多功能引脚上的信号大于预定值时，电压检测电路将PWM信号产生电路配置为间歇地导通电力转换电路的电流开关。 零电流检测电路检测多功能引脚的信号，以确定电流开关的导通状态。 当多功能引脚的信号小于预定值时，电压检测电路配置PWM信号产生电路以关断电流开关。

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。