公开(公告)号：US07026800B2

公开(公告)日：2006-04-11

申请号：US10683395

申请日：2003-10-14

申请人： Jing-Meng Liu ,  Liang-Pin Tai ,  Der-Jiunn Wang

发明人： Jing-Meng Liu ,  Liang-Pin Tai ,  Der-Jiunn Wang

IPC分类号： G05F1/40 ,  H02M1/12

CPC分类号： H02M3/156

摘要： In a method for a DC-DC power conversion performed by a switching mode buck voltage converter, the power conversion is split into two or more stages, and a feed-forward signal is generated by one of the stages and sent to another stage prior thereto. The feed-forward signal is generated by responding to a load current transient, such as output voltage drop, ON-duty increment or decrement occurred in the PWM control loop, error amp output swinging, and any other detectable signals in response to load current transient of the voltage converter. As a result, the performance of the DC-DC voltage converter is improved due to the prior stage modulated early in time, and both lower ripple current and peak current in steady state operations and fast response to load current transient conditions could be simultaneously obtained.

摘要翻译： 在由开关模式降压电压转换器执行的DC-DC功率转换的方法中，功率转换被分为两级或更多级，并且前级信号由其中一级产生并发送到其之前的另一级 。 前馈信号通过响应负载电流瞬变而产生，例如输出电压降，PWM控制环中发生的占空比增量或减量，误差放大器输出摆幅以及响应于负载电流瞬变的任何其他可检测信号 的电压转换器。 结果，由于早期调制了DC-DC电压转换器的性能，可以同时获得稳态运行中的较低纹波电流和峰值电流以及对负载电流瞬态条件的快速响应。

公开(公告)号：US06876190B2

公开(公告)日：2005-04-05

申请号：US10820730

申请日：2004-04-09

申请人： Liang-Pin Tai ,  Shwu-Liang Hsieh ,  Hung-I Wang ,  Jing-Meng Liu

发明人： Liang-Pin Tai ,  Shwu-Liang Hsieh ,  Hung-I Wang ,  Jing-Meng Liu

IPC分类号： G01R19/00 ,  H02M3/158 ,  G01R33/00

CPC分类号： G01R19/0092 ,  H02M3/1588 ,  H02M2001/0009 ,  Y02B70/1466

摘要： A current sense apparatus and method comprises a common drain DMOSFET and a MOSFET connected in series between a high voltage and a low voltage to serve as an output stage. The DMOSFET produces a phase output current, a mirror current mirrored from the phase output current, and a sense voltage. A servo amplifier is connected with the mirror current and sense voltage to produce a current sense signal. Due to the mirror current from the DMOSFET proportional to the phase output current, the current sense apparatus senses the phase output current in a temperature independent manner.

摘要翻译： 电流检测装置和方法包括在高电压和低电压之间串联连接的公共漏极DMOSFET和MOSFET，用作输出级。 DMOSFET产生相输出电流，从相输出电流镜像的镜电流和感测电压。 伺服放大器与反射镜电流和感测电压连接，产生电流检测信号。 由于来自DMOSFET的反射电流与相输出电流成比例，电流检测装置以独立于温度的方式感测相输出电流。

公开(公告)号：US20160218617A1

公开(公告)日：2016-07-28

申请号：US15092014

申请日：2016-04-06

申请人： Chia-Wei Liao ,  Jing-Meng Liu

发明人： Chia-Wei Liao ,  Jing-Meng Liu

IPC分类号： H02M1/42 ,  H02M1/08 ,  G05F3/26

CPC分类号： H02M1/42 ,  G05F3/262 ,  H02M1/08 ,  H02M1/126 ,  H02M1/4208 ,  H02M2001/0009 ,  Y02B70/126

摘要： The present invention discloses a power supply circuit with power factor correction (PFC) function, and an automatic gain control circuit therefor and a control method thereof. The power supply circuit includes the automatic gain control circuit and a load driver circuit. The automatic gain control circuit converts an input voltage to a regulation voltage, and the load driver circuit generates an output current according to the regulation voltage. The automatic gain control circuit automatically adjust the regulation voltage such that the regulation voltage has a substantially fixed amplitude or fixed average value under different input voltages of different specifications, and the output current provided by the load driver circuit varies in phase with the input voltage to provide a PFC function.

公开(公告)号：US08884537B2

公开(公告)日：2014-11-11

申请号：US13728541

申请日：2012-12-27

申请人： Chia-Wei Liao ,  Leng-Nien Hsiu ,  Pei-Yuan Chen ,  Roland Van Roy ,  Jing-Meng Liu

发明人： Chia-Wei Liao ,  Leng-Nien Hsiu ,  Pei-Yuan Chen ,  Roland Van Roy ,  Jing-Meng Liu

IPC分类号： H05B37/02 ,  H05B39/02 ,  H05B39/04 ,  H05B41/36 ,  G05F3/02 ,  G05F1/455 ,  H05B33/08 ,  G05F1/10

CPC分类号： G05F1/455 ,  G05F1/10 ,  G05F3/02 ,  H05B33/0815 ,  H05B37/02 ,  Y02B20/346

摘要： The present invention discloses an active bleeder circuit capable of triggering a tri-electrode AC switch (TRIAC) circuit in all phase. The active bleeder circuit receives a rectified signal having an OFF phase and an ON phase. The active bleeder includes: a detection circuit for generating a detection signal according to the rectified signal and accumulating the detection signal in the OFF phase of the rectified signal; and a current sinker circuit coupled to the detection circuit, for generates a latching current to trigger the TRIAC circuit by operating a switch when the detection signal exceeds a predetermined level. The present invention also discloses a light emitting device power supply circuit and a TRIAC control method using the active bleeder circuit.

摘要翻译： 本发明公开了一种能够全相触发三电极交流开关（TRIAC）电路的有源泄放电路。 有源泄放电路接收具有OFF相位和ON相位的整流信号。 有源放电器包括：检测电路，用于根据整流信号产生检测信号，并将检测信号累积在整流信号的OFF相位; 以及耦合到检测电路的电流沉降电路，用于当检测信号超过预定电平时，通过操作开关产生触发TRIAC电路的锁存电流。 本发明还公开了一种使用有源泄放电路的发光器件电源电路和TRIAC控制方法。

公开(公告)号：US08710755B2

公开(公告)日：2014-04-29

申请号：US13421733

申请日：2012-03-15

申请人： Pei-Yuan Chen ,  Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

发明人： Pei-Yuan Chen ,  Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： The present invention discloses a light emitting device power supply circuit, a light emitting device driver circuit and a control method thereof. The light emitting device driver circuit is coupled to a tri-electrode AC switch (TRIAC) dimmer circuit, and it controls the brightness of a light emitting device circuit according a rectified dimming signal. The light emitting device driver circuit includes a power stage circuit and a light emitting device control circuit. The light emitting device control circuit generates a switch control signal. The power stage circuit operates at least one power switch thereof according to the switch control signal to generate a latching current for firing the TRIAC dimmer circuit, and the latching current is inputted to the light emitting device circuit.

摘要翻译： 本发明公开了一种发光装置电源电路，发光装置驱动电路及其控制方法。 发光器件驱动电路耦合到三极交流开关（TRIAC）调光电路，并根据整流调光信号控制发光器件电路的亮度。 发光器件驱动电路包括功率级电路和发光器件控制电路。 发光装置控制电路产生开关控制信号。 功率级电路根据开关控制信号操作其至少一个电源开关，以产生用于触发TRIAC调光电路的锁存电流，并且将锁存电流输入到发光器件电路。

公开(公告)号：US08531491B2

公开(公告)日：2013-09-10

申请号：US12782253

申请日：2010-05-18

申请人： Jing-Meng Liu

发明人： Jing-Meng Liu

IPC分类号： G09G5/10 ,  H03K5/22

CPC分类号： H05B33/0896 ,  H05B33/0827

摘要： The present invention discloses a current-matching circuit including a hierarchical tree structure having two or more levels, each of which includes multiple matching devices, wherein each matching device at a preceding level corresponds to a predetermined number of matching devices at a next level. Respective matching devices at a last level control currents in respective current channels; the channels of the same group are matched with one another in current.

摘要翻译： 本发明公开了一种电流匹配电路，其包括具有两个或更多个层次的分层树结构，每个级别包括多个匹配装置，其中前一级的每个匹配装置对应于下一级的预定数量的匹配装置。 最后一级的各匹配装置控制各个电流通道中的电流; 同一组的通道在当前相互匹配。

公开(公告)号：US08508464B2

公开(公告)日：2013-08-13

申请号：US12008797

申请日：2008-01-14

申请人： Chiawei Liao ,  Xiaoyong Zhang ,  Jing-Meng Liu

发明人： Chiawei Liao ,  Xiaoyong Zhang ,  Jing-Meng Liu

IPC分类号： G09G3/36 ,  G09G5/00 ,  H05B37/02 ,  H05B37/00

CPC分类号： G09G3/3426

摘要： The present invention discloses a backlight control circuit capable of distinguishing an under current condition, comprising: at least one light emission device path having a voltage node; at least one current source for controlling the current amount on the light emission device path; and at least one under current detection circuit for generating a first control signal according to the voltage at the voltage node, wherein when the first control signal changes its state, the under current detection circuit generates a second control signal to change the voltage on the voltage node if the light emission device path is normally connected.

摘要翻译： 本发明公开了一种能够区分欠电流状态的背光控制电路，包括：具有电压节点的至少一个发光器件路径; 至少一个用于控制发光装置路径上的电流量的电流源; 以及至少一个欠电流检测电路，用于根据电压节点处的电压产生第一控制信号，其中当第一控制信号改变其状态时，欠电流检测电路产生第二控制信号以改变电压上的电压 节点，如果发光设备路径正常连接。

公开(公告)号：US20130114308A1

公开(公告)日：2013-05-09

申请号：US13674824

申请日：2012-11-12

申请人： Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu ,  Pei-Yuan Chen

发明人： Chia-Wei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu ,  Pei-Yuan Chen

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/4258 ,  Y02B70/126

摘要： The present invention discloses a switching regulator and a control circuit and a control method thereof. The control circuit of the switching regulator, which controls rectified power within a predetermined range, detects an input voltage and an input current to generate a voltage detection signal and a current detection signal respectively, and the voltage detection signal and the current detection signal are multiplied by one the other to generate a power index. The control circuit generates an error signal according to the power index and a reference signal. A low-pass-filter filters a high frequency band in the process. A control signal generation circuit of the control circuit generates a control signal according to the error signal. And a driver circuit of the control circuit generates an operation signal according to the control signal, for switching a power switch to convert the rectified power to an output voltage.

摘要翻译： 本发明公开了一种开关调节器及其控制电路及其控制方法。 开关调节器的控制电路，其控制在预定范围内的整流功率，检测输入电压和输入电流，分别产生电压检测信号和电流检测信号，并将电压检测信号和电流检测信号相乘 通过另一个来产生权力指数。 控制电路根据功率指标和参考信号产生误差信号。 低通滤波器过滤高频带。 控制电路的控制信号生成电路根据误差信号生成控制信号。 并且控制电路的驱动电路根据控制信号生成操作信号，用于切换电源开关以将整流功率转换为输出电压。

公开(公告)号：US08319444B2

公开(公告)日：2012-11-27

申请号：US12787599

申请日：2010-05-26

申请人： Chiawei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

发明人： Chiawei Liao ,  Jing-Meng Liu ,  Leng-Nien Hsiu

IPC分类号： H05B37/00

CPC分类号： H05B33/0818 ,  Y02B20/346

摘要： The present invention discloses a tail-less LED control circuit, which includes: a power supply stage having an output terminal which provides electrical power to an LED circuit; an output capacitor coupled to the output terminal; an LED driver circuit coupled to the power supply stage for controlling the power supply stage to provide the electrical power to the LED circuit, the LED driver circuit receiving a PWM dimming signal for adjusting brightness of the LED circuit; and a MOSFET switch coupled to the output capacitor in series, the MOSFET switch switching synchronously with the PWM dimming signal to alleviate LED afterglow, wherein the MOSFET switch includes a body diode having an anode-cathode direction against the discharge direction of the output capacitor.

摘要翻译： 本发明公开了一种无尾LED控制电路，其包括：具有向LED电路提供电力的输出端子的电源级; 耦合到所述输出端子的输出电容器; LED驱动器电路，其耦合到所述电源级，用于控制所述电源级以向所述LED电路提供电力，所述LED驱动器电路接收用于调节所述LED电路的亮度的PWM调光信号; 以及耦合到串联的输出电容器的MOSFET开关，MOSFET开关与PWM调光信号同步地切换以减轻LED余辉，其中MOSFET开关包括具有抵抗输出电容器的放电方向的阳极 - 阴极方向的体二极管。

公开(公告)号：US08093822B2

公开(公告)日：2012-01-10

申请号：US12216837

申请日：2008-07-11

申请人： Jing-Meng Liu

发明人： Jing-Meng Liu

IPC分类号： H05B37/02

CPC分类号： H05B33/0818 ,  H05B33/0815 ,  H05B33/0866 ,  Y02B20/347

摘要： An LED driver providing an LED lighting current to an LED path, extracts the LED lighting current information from the LED path to produce a first signal including an AC component and a DC component, and extracts the DC component information of the first signal to produce a second signal to regulate an average of the LED lighting current. This LED driver implements real constant average current regulation for an LED lighting apparatus, eliminates the need of output capacitor as well as rectifier diode in most applications to simplify the circuit of the power stage, and is applicable to power stages of various modes.

摘要翻译： 向LED路径提供LED点亮电流的LED驱动器，从LED路径提取LED点亮电流信息，以产生包括AC分量和DC分量的第一信号，并提取第一信号的DC分量信息以产生 第二个信号来调节LED照明电流的平均值。 该LED驱动器为LED照明装置实现了实际的恒定平均电流调节，在大多数应用中不需要输出电容器以及整流二极管来简化功率级的电路，并且适用于各种模式的功率级。