公开(公告)号：US09130464B2

公开(公告)日：2015-09-08

申请号：US14014642

申请日：2013-08-30

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M3/36

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

公开(公告)号：US09106151B2

公开(公告)日：2015-08-11

申请号：US13659431

申请日：2012-10-24

Applicant: Richtek Technology Corp.

Inventor： Roland Van Roy ,  Leng-Nien Hsiu ,  Pei-Yuan Chen

IPC: G05F5/00 ,  H02M1/42 ,  H02M1/00

CPC classification number: H02M1/4258 ,  H02M2001/0025 ,  Y02B70/126

Abstract: A power-factor-improving circuit and method for an offline converter block the DC component and obtain the AC component of an input voltage of the offline converter. The AC component is superpositioned onto a DC bias signal to generate a dimming signal for the offline converter to adjust an output current of the offline converter. The offline converter has a high power factor due to the dimming signal with the AC component of the input voltage. In addition, the average of the dimming signal is determined by the DC bias signal, hence the output current can be precisely controlled according to the DC bias signal.

Abstract translation: 用于离线转换器的功率因数改善电路和方法阻断DC分量并获得离线转换器的输入电压的AC分量。 AC分量叠加到DC偏置信号上，以产生离线转换器的调光信号，以调整离线转换器的输出电流。 离线转换器由于具有输入电压的AC分量的调光信号而具有高功率因数。 此外，调光信号的平均值由直流偏置信号确定，因此可以根据直流偏置信号精确控制输出电流。

公开(公告)号：US09059585B2

公开(公告)日：2015-06-16

申请号：US13729936

申请日：2012-12-28

Applicant: Richtek Technology Corporation

Inventor： Yen-Te Lee ,  Kuo-Chi Liu ,  Wen-Wei Chen ,  Yi-Fan Chen ,  Kuang-Feng Li

IPC: H02H7/16 ,  H02M7/06 ,  H02M1/44 ,  H02M1/32

CPC classification number: H02H7/16 ,  H02M1/44 ,  H02M7/06 ,  H02M2001/322

Abstract: An independent bleeding integrated circuit device is provided to replace the bleeding resistor for an EMI filter capacitor, to establish a discharge path between the two terminals of the EMI filter capacitor when the EMI filter capacitor is disconnected from an AC power source, for discharging the EMI filter capacitor. When the EMI filter capacitor is connected with an AC power source, the discharge path is cut off to avoid power loss.

Abstract translation: 提供独立的出血集成电路器件来替代EMI滤波电容器的出血电阻器，当EMI滤波电容器与AC电源断开时，建立EMI滤波电容器的两个端子之间的放电路径，用于放电EMI 滤波电容器。 当EMI滤波电容器与交流电源连接时，放电路径被切断以避免功率损耗。

公开(公告)号：US09041307B1

公开(公告)日：2015-05-26

申请号：US14447425

申请日：2014-07-30

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Huan-Chien Yang ,  Shui-Mu Lin ,  Shei-Chie Yang ,  Shih Chung Wang

IPC: G05F1/00 ,  H05B33/08

CPC classification number: H05B33/0848

Abstract: A method for brightness control, adapted to a light emitting device emitting a light of an output brightness, comprises: setting the output brightness to be an initial value, and controlling the light emitting device emitting the light accordingly; setting a target value, and controlling the output brightness changing from the initial value toward the target value with the brightness changing rate of the brightness zone corresponding to the initial value; controlling the output brightness changing toward the target value with the following brightness changing rate when the output brightness crossing one of the brightness thresholds and entering the following brightness zone, wherein the following brightness changing rate corresponds to the following brightness zone; stopping changing the output brightness when reaching the target value.

Abstract translation: 一种用于亮度控制的方法，适用于发出输出亮度的光的发光装置，包括：将输出亮度设定为初始值，并相应地控制发光装置的发光装置; 设定目标值，并且以与初始值对应的亮度区域的亮度变化率，控制从初始值向目标值变化的输出亮度; 当输出亮度穿过亮度阈值之一并进入以下亮度区域时，控制输出亮度朝着目标值变化，具有以下亮度变化率，其中以下亮度变化率对应于以下亮度区域; 停止在达到目标值时改变输出亮度。

公开(公告)号：US20150137602A1

公开(公告)日：2015-05-21

申请号：US14139454

申请日：2013-12-23

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Wei-Jen Huang ,  Tsung-Wei Huang ,  Shui-Mu Lin

IPC: H02J4/00

CPC classification number: H02J7/025 ,  H02J4/00 ,  H02J5/00 ,  H02J5/005 ,  H02J7/02 ,  H02J9/061 ,  H02J50/10 ,  H02J50/40 ,  H02J2007/0062 ,  Y10T307/549

Abstract: A power management unit, adapted to a wireless power supplying unit, for switching between input powers and providing a rated voltage or a variable flow current is provided. The power management unit includes a rectifying unit, a regulating unit, and a control unit. The rectifying unit converts AC power into DC power. The regulating unit is connected to the rectifying unit and generates a stable rated voltage or a variable flow current. The control unit is connected to the regulating unit and controls the input power driving the regulating unit. In addition, an apparatus and a method for a wireless power supplying unit are provided.

Abstract translation: 提供了一种适用于无线供电单元的功率管理单元，用于在输入功率之间切换并提供额定电压或可变流量。 电源管理单元包括整流单元，调节单元和控制单元。 整流单元将交流电转换成直流电源。 调节单元连接到整流单元，产生稳定的额定电压或可变流量。 控制单元连接到调节单元并控制驱动调节单元的输入电力。 另外，提供了一种用于无线供电单元的装置和方法。

公开(公告)号：US20150070951A1

公开(公告)日：2015-03-12

申请号：US14097042

申请日：2013-12-04

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M7/06

CPC classification number: H02M7/06 ,  H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: An AC-to-DC power converting apparatus includes a power factor correction circuit generating a DC output voltage based on a rectified voltage obtained through rectifying an AC input voltage and on a PWM signal generated based on an adjustment current and a predetermined ramp signal. A multiplier-divider circuit includes: a ramp generating unit generating a ramp signal based on a clock signal and on a first detection voltage associated with the rectified voltage; a control unit generating a control signal based on the clock signal, the ramp signal, and a detection voltage generated based on the DC output voltage; and an output unit generating an adjustment signal based on an input signal associated with the rectified voltage and the control signal.

Abstract translation: AC-DC电力转换装置包括功率因数校正电路，该功率因数校正电路基于通过对AC输入电压进行整流获得的整流电压和基于调整电流和预定斜坡信号产生的PWM信号产生DC输出电压。 乘法器分频器电路包括：斜坡发生单元，其基于时钟信号和与整流电压相关联的第一检测电压产生斜坡信号; 控制单元，基于所述时钟信号，所述斜坡信号和基于所述直流输出电压生成的检测电压来生成控制信号; 以及输出单元，其基于与整流电压和控制信号相关联的输入信号生成调整信号。

公开(公告)号：US08823424B1

公开(公告)日：2014-09-02

申请号：US14285038

申请日：2014-05-22

Applicant: Richtek Technology Corporation

Inventor： Pei-Kai Tseng ,  Chien-Fu Tang ,  Issac Y. Chen

IPC: H03K3/00 ,  H03L5/00 ,  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.

公开(公告)号：US08786213B2

公开(公告)日：2014-07-22

申请号：US13706219

申请日：2012-12-05

Applicant: Richtek Technology Corporation

Inventor： Shei-Chie Yang ,  Shui-Mu Lin ,  Jun-Sheng Cheng ,  Ming-Yu Lin ,  Chun-I Lin

IPC: H05B37/02

CPC classification number: H05B37/02 ,  H05B33/0848

Abstract: LED dimming control circuit and method compensate LED current or LED average current by LED characteristics to improve dimming efficiency and performance. LED characteristic related look-up tables are stored to provide compensation values, and input LED current setting information is compensated by the compensation values to generate corrected LED current setting information for determining LED brightness.

Abstract translation: LED调光控制电路和方法通过LED特性补偿LED电流或LED平均电流，提高调光效率和性能。 存储LED特征相关查找表以提供补偿值，并且通过补偿值补偿输入LED电流设置信息，以产生用于确定LED亮度的校正LED电流设置信息。

公开(公告)号：US20140191732A1

公开(公告)日：2014-07-10

申请号：US13871286

申请日：2013-04-26

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Pei Kai Tseng ,  Chien Fu Tang ,  Isaac Y. Chen

IPC: H02J7/00

CPC classification number: H02M1/36 ,  H02J7/0016 ,  H02J7/345 ,  H02M3/07

Abstract: A bootstrap circuit includes: a charging voltage source; a charging diode, having an anode coupled to the charging voltage source; a high-voltage transistor, having a control terminal defined as a first connecting node and a channel coupled between a cathode of the charging diode and a bootstrap capacitor; a logic control circuit, having a first and a second logic outputs, and a logic input for receiving a charging command; a high-voltage control transistor, having a control terminal defined as a second connecting node and a channel coupled between charging voltage source and the first connecting node; a cut-off resistor, coupled between the first and the second connecting nodes; a charging control transistor, having a channel coupled between the second connecting node and a ground terminal, and a control terminal coupled to the second logic output; a control capacitor, coupled between the first connecting node and the first logic output.

Abstract translation: 引导电路包括：充电电压源; 充电二极管，具有耦合到所述充电电压源的阳极; 具有被定义为第一连接节点的控制端子和耦合在充电二极管的阴极和自举电容器之间的通道的高压晶体管; 具有第一和第二逻辑输出的逻辑控制电路和用于接收充电命令的逻辑输入; 高压控制晶体管，其具有被定义为第二连接节点的控制端子和耦合在充电电压源与第一连接节点之间的通道; 截止电阻器，耦合在所述第一和第二连接节点之间; 具有耦合在第二连接节点和接地端子之间的通道的充电控制晶体管和耦合到第二逻辑输出的控制端子; 耦合在第一连接节点和第一逻辑输出之间的控制电容器。

公开(公告)号：US08729820B2

公开(公告)日：2014-05-20

申请号：US12831528

申请日：2010-07-07

Applicant: Tsung-Wei Huang ,  Shui-Mu Lin ,  Pao-Hsun Yu ,  Ying-Hsin Hsing

Inventor： Tsung-Wei Huang ,  Shui-Mu Lin ,  Pao-Hsun Yu ,  Ying-Hsin Hsing

IPC: H05B41/36 ,  G05F1/10

CPC classification number: H05B33/0815 ,  H05B33/0845 ,  Y02B20/346

Abstract: A LED driver integrated circuit has a voltage input pin, a voltage output pin, a capacitor pin, and a switching circuit connected to the capacitor pin and the voltage output pin. The capacitor pin and the voltage output pin are for a flying capacitor to be connected therebetween, and thus the switching circuit and the flying capacitor establish a charge pump to convert an input voltage received by the voltage input pin into an output voltage at the voltage output pin.

Abstract translation: LED驱动器集成电路具有电压输入引脚，电压输出引脚，电容引脚和连接到电容引脚和电压输出引脚的开关电路。 电容器引脚和电压输出引脚用于连接在其间的飞电容器，因此开关电路和飞跨电容器建立电荷泵，以将由电压输入引脚接收的输入电压转换为电压输出端的输出电压 销。