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1. 发明授权

US08129958B2 Transition mode power factor correction device with built-in automatic total harmonic distortion reduction feature 有权
标题翻译：转换模式功率因数校正装置，内置自动总谐波失真降低功能
公开(公告)号：US08129958B2
公开(公告)日：2012-03-06
申请号：US12411027
申请日：2009-03-25
申请人： Matthew Man Ho Ku , Run Qin Tan
发明人： Matthew Man Ho Ku , Run Qin Tan
IPC分类号： G05F5/00
CPC分类号： H02M7/217 , H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： A controller for reducing the harmonics contents in the AC-to-DC converter that is capable of minimizing THD due to crossover distortion. The controller can approximate the shape of the current running through boost inductor to the sinusoidal waveform of the rectified line input voltage and in the meantime to keep the valley of rectified sinusoidal waveform line voltage close to local ground value. The controller can be used in a transition mode power factor correction device suitable for a wide range of AC line input voltage and output loading application.
摘要翻译：一种用于降低由于交叉失真而能够使THD最小化的AC-DC转换器中的谐波内容的控制器。控制器可以将通过升压电感的电流形状近似为整流线输入电压的正弦波形，同时保持整流正弦波形线电压的谷值接近于局部接地值。控制器可用于适用于各种交流线路输入电压和输出负载应用的过渡模式功率因数校正装置。

2. 发明授权

US08045308B2 Clamp protection circuit and a PFC control circuit employing such clamp protection circuit 有权
标题翻译：钳位保护电路和采用这种钳位保护电路的PFC控制电路
公开(公告)号：US08045308B2
公开(公告)日：2011-10-25
申请号：US12417288
申请日：2009-04-02
申请人： Run Qin Tan , Li Fang Guo , Matthew Man Ho Ku
发明人： Run Qin Tan , Li Fang Guo , Matthew Man Ho Ku
IPC分类号： H02H3/20 , H02H3/08
CPC分类号： H03K17/0814 , H02M1/34
摘要： The present invention relates to clamp protection circuit and a PFC control circuit employing such clamp protection circuit. Said clamp protection circuit comprises a high voltage isolation module used for receiving power from a high voltage power supply; a voltage clamp module used for receiving an output low voltage from the high voltage isolation module and realizing a clamp protection; and a low voltage bias module used for providing bias voltage to the high voltage isolation module and the voltage clamp module. By employing the clamp protection circuit, the precision of the clamp voltage is improved, the design is simplified and the silicon area is reduced. Meanwhile, the transient response is enhanced. Moreover, when the clamp protection circuit is applied in a PFC control circuit, the design of the whole PFC control circuit is simplified and the silicon area is reduced, and the precision and transient response of the clamp voltage of the clamp protection circuit inside the PFC control circuit are improved.
摘要翻译：本发明涉及钳位保护电路和采用这种钳位保护电路的PFC控制电路。所述钳位保护电路包括用于从高压电源接收电力的高压隔离模块; 用于从高压隔离模块接收输出低电压并实现钳位保护的电压钳模块; 以及用于向高压隔离模块和电压钳模块提供偏置电压的低电压偏压模块。通过采用钳位保护电路，提高了钳位电压的精度，简化了设计，降低了硅面积。同时，瞬态响应得到增强。此外，当钳位保护电路应用于PFC控制电路时，整个PFC控制电路的设计简化，硅面积减小，PFC内部钳位保护电路的钳位电压的精度和瞬态响应控制电路得到改善。

3. 发明申请

US20100253410A1 CLAMP PROTECTION CIRCUIT AND A PFC CONTROL CIRCUIT EMPLOYING SUCH CLAMP PROTECTION CIRCUIT 有权
标题翻译：钳位保护电路和采用这种钳位保护电路的PFC控制电路
公开(公告)号：US20100253410A1
公开(公告)日：2010-10-07
申请号：US12417288
申请日：2009-04-02
申请人： Run Qin Tan , Li Fang Guo , Matthew Man Ho Ku
发明人： Run Qin Tan , Li Fang Guo , Matthew Man Ho Ku
IPC分类号： H03K5/08
CPC分类号： H03K17/0814 , H02M1/34
摘要： The present invention relates to clamp protection circuit and a PFC control circuit employing such clamp protection circuit. Said clamp protection circuit comprises a high voltage isolation module used for receiving power from a high voltage power supply; a voltage clamp module used for receiving an output low voltage from the high voltage isolation module and realizing a clamp protection; and a low voltage bias module used for providing bias voltage to the high voltage isolation module and the voltage clamp module. By employing the clamp protection circuit, the precision of the clamp voltage is improved, the design is simplified and the silicon area is reduced. Meanwhile, the transient response is enhanced. Moreover, when the clamp protection circuit is applied in a PFC control circuit, the design of the whole PFC control circuit is simplified and the silicon area is reduced, and the precision and transient response of the clamp voltage of the clamp protection circuit inside the PFC control circuit are improved.
摘要翻译：本发明涉及钳位保护电路和采用这种钳位保护电路的PFC控制电路。所述钳位保护电路包括用于从高压电源接收电力的高压隔离模块; 用于从高压隔离模块接收输出低电压并实现钳位保护的电压钳模块; 以及用于向高压隔离模块和电压钳模块提供偏置电压的低电压偏压模块。通过采用钳位保护电路，提高了钳位电压的精度，简化了设计，降低了硅面积。同时，瞬态响应得到增强。此外，当钳位保护电路应用于PFC控制电路时，整个PFC控制电路的设计简化，硅面积减小，PFC内部钳位保护电路的钳位电压的精度和瞬态响应控制电路得到改善。

4. 发明申请

US20100246226A1 TRANSITION MODE POWER FACTOR CORRECTION DEVICE WITH BUILT-IN AUTOMATIC TOTAL HARMONIC DISTORTION REDUCTION FEATURE 有权
标题翻译：具有内置自动总谐波失真特性的过渡模式功率因数校正装置
公开(公告)号：US20100246226A1
公开(公告)日：2010-09-30
申请号：US12411027
申请日：2009-03-25
申请人： Matthew Man Ho Ku , Run Qin Tan
发明人： Matthew Man Ho Ku , Run Qin Tan
IPC分类号： H02M7/12
CPC分类号： H02M7/217 , H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： The present invention relates to controller for reducing the harmonics contents in the AC-to-DC converter. The controller, capable of minimizing THD due to crossover distortion, comprises: a THD Reducer for setting an appropriate offset voltage to for THD reduction; an Error Amplifier for generating an output voltage error signal corresponding to a deviation in the output voltage of the power supply unit from a predetermined reference voltage; Multiplier for combining the divided down rectified signal with the output voltage error signal to generate a sinusoidal reference signal; Comparator for generating a logic signal for setting the Power NMOS on period by comparing the received current sense signal with the summation of offset voltage from THD Reducer and output of Multiplier; Zero Crossing Detector (ZCD) for generating an edge logic signal to turn on Power NMOS, RS Flip-Flop Register and Gate Driver combined to create required analog waveform pattern for driving Power NMOS and thereby approximating the shape of the current running through boost inductor to the sinusoidal waveform of the rectified line input voltage and in the meantime to keep the valley of rectified sinusoidal waveform line voltage close to local ground value.
摘要翻译：本发明涉及用于降低AC-DC转换器中谐波含量的控制器。该控制器能够由于交叉失真而使THD最小化，包括：用于设置适当偏移电压以减少THD的THD减速器; 误差放大器，用于产生与电源单元的输出电压的偏差相对应的预定参考电压的输出电压误差信号; 用于将分频整流信号与输出电压误差信号组合以产生正弦参考信号的乘法器; 比较器，用于通过将接收的电流检测信号与THD减速器的偏移电压和乘法器的输出进行比较来产生用于设置功率NMOS上电周期的逻辑信号; 零交叉检测器（ZCD），用于产生边沿逻辑信号以接通功率NMOS，RS触发寄存器和门极驱动器，以组合创建所需的模拟波形图案，用于驱动功率NMOS，从而逼近通过升压电感器流过的电流的形状整流线输入电压的正弦波形，同时保持整流正弦波形线电压的谷值接近于局部接地值。

5. 发明授权

US08427114B2 Apparatus for controlling LED indicator of charging status at the primary control side of an AC-DC power charger 有权
标题翻译：用于控制AC-DC电源充电器主控制侧充电状态LED指示灯的装置
公开(公告)号：US08427114B2
公开(公告)日：2013-04-23
申请号：US12490120
申请日：2009-06-23
申请人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng
发明人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng
IPC分类号： H02J7/04
CPC分类号： H02J7/0047
摘要： The present invention relates to a charge status indicator and a charger. The charger comprises a charging power supply and a charge status indicator, wherein, the charge status indicator comprises a detecting chip for monitoring charge status connected between the primary winding of transformer and ground, and a display module used for displaying the charge status, wherein, said detecting chip for monitoring charge status comprising: a detecting module for detecting the charging state of the charge power supply; a comparing module for determining the current charge status based on the detected charging state. By employing the charger or the charge status indicator for a charger, a primary-side feedback control Flyback SMPS may be employed, just a simple and reliable circuit is needed, and higher efficient can be achieved.
摘要翻译：本发明涉及充电状态指示器和充电器。充电器包括充电电源和充电状态指示器，其中，充电状态指示器包括用于监视连接在变压器的初级绕组和地之间的充电状态的检测芯片和用于显示充电状态的显示模块，其中，所述用于监视充电状态的检测芯片包括：检测模块，用于检测充电电源的充电状态; 比较模块，用于基于检测到的充电状态确定当前充电状态。通过使用充电器或充电器的充电状态指示器，可以采用初级侧反馈控制反激式SMPS，只需要简单可靠的电路，并且可以实现更高的效率。

6. 发明授权

US08201012B2 Load adaptive EMI reduction scheme for switching mode power supply 有权
标题翻译：负载开关模式电源自适应EMI降低方案
公开(公告)号：US08201012B2
公开(公告)日：2012-06-12
申请号：US12429727
申请日：2009-04-24
申请人： Matthew Man Ho Ku
发明人： Matthew Man Ho Ku
IPC分类号： G06F1/26
CPC分类号： G06F1/08 , H02M1/44 , H02M3/33507 , H03K3/84 , H03K7/08 , H04R3/00
摘要： The present invention relates to a frequency jittering device and method, and a switching power supply employing such frequency jittering device. Said method comprises: S1 generating a variable logic number; S2 generating a delay signal; S3 generating a PWM control signal according to the variable logic number and the delay signal; S4 generating an output signal according to the PWM control signal; and S5 generating a clock signal with variable frequency according to the output signal; wherein, the clock signal is fed back to update the variable logic number, and a jittering clock signal modified in each clock cycle is produced. The benefit of the present invention is not only can apply small low cost EMI filter but also can keep the noise floor level low enough at light load condition.
摘要翻译：本发明涉及一种频率抖动装置和方法，以及采用这种频率抖动装置的开关电源。所述方法包括：S1产生可变逻辑数; S2产生延迟信号; S3根据可变逻辑号和延迟信号产生PWM控制信号; S4根据PWM控制信号产生输出信号; S5根据输出信号产生具有可变频率的时钟信号; 其中，时钟信号被反馈以更新可变逻辑号，并且产生在每个时钟周期中修改的抖动时钟信号。本发明的优点不仅可以应用小型低成本EMI滤波器，而且还可以在轻负载条件下将噪声基底电平保持在足够低的范围。

7. 发明授权

US09125270B2 LED dimming device and LED dimming and driving circuit 有权
标题翻译： LED调光装置和LED调光驱动电路
公开(公告)号：US09125270B2
公开(公告)日：2015-09-01
申请号：US13528804
申请日：2012-06-20
申请人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng , Lifang Guo , Guangyao You
发明人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng , Lifang Guo , Guangyao You
IPC分类号： H05B33/08 , H05B37/02 , H05B39/04 , H05B41/36 , G05F1/00
CPC分类号： H05B33/0845
摘要： A LED dimming device, and a LED dimming and a driving circuit using such LED dimming device are discussed. In present embodiment, the LED dimming device multiplexes an inputting switch and/or a sampling module of the LED driving circuit for dimming. such LED dimming device will not affect the sine waves of input current, in such a way, power factor and work efficiency will be increased while the harmonic coefficient and interference signal will be reduced.
摘要翻译：讨论了LED调光装置以及使用这种LED调光装置的LED调光和驱动电路。在本实施例中，LED调光装置多路复用LED驱动电路的输入开关和/或采样模块进行调光。这种LED调光装置不会影响输入电流的正弦波，这样就可以提高功率因数和工作效率，同时降低谐波系数和干扰信号。

8. 发明申请

US20130241424A1 LED DIMMING DEVICE AND LED DIMMING AND DRIVING CIRCUIT 有权
标题翻译： LED调光装置和LED调光和驱动电路
公开(公告)号：US20130241424A1
公开(公告)日：2013-09-19
申请号：US13528804
申请日：2012-06-20
申请人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng , Lifang Guo , Guangyao You
发明人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng , Lifang Guo , Guangyao You
IPC分类号： H05B37/02
CPC分类号： H05B33/0845
摘要： A LED dimming device, and a LED dimming and a driving circuit using such LED dimming device are discussed. In present embodiment, the LED dimming device multiplexes an inputting switch and/or a sampling module of the LED driving circuit for dimming. such LED dimming device will not affect the sine waves of input current, in such a way, power factor and work efficiency will be increased while the harmonic coefficient and interference signal will be reduced.
摘要翻译：讨论了LED调光装置以及使用这种LED调光装置的LED调光和驱动电路。在本实施例中，LED调光装置多路复用LED驱动电路的输入开关和/或采样模块进行调光。这种LED调光装置不会影响输入电流的正弦波，这样就可以提高功率因数和工作效率，同时降低谐波系数和干扰信号。

9. 发明申请

US20100321193A1 APPARATUS FOR CONTROLLING LED INDICATOR OF CHARGING STATUS AT THE PRIMARY CONTROL SIDE OF AN AC-DC POWER CHARGER 有权
标题翻译：用于控制AC-DC电力充电器主控制侧充电状态LED指示灯的装置
公开(公告)号：US20100321193A1
公开(公告)日：2010-12-23
申请号：US12490120
申请日：2009-06-23
申请人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng
发明人： Weiming Liao , Matthew Man Ho Ku , Yue Zheng
IPC分类号： G08B21/00 , H02J7/04
CPC分类号： H02J7/0047
摘要： The present invention relates to a charge status indicator and a charger. The charger comprises a charging power supply and a charge status indicator, wherein, the charge status indicator comprises a detecting chip for monitoring charge status connected between the primary winding of transformer and ground, and a display module used for displaying the charge status, wherein, said detecting chip for monitoring charge status comprising: a detecting module for detecting the charging state of the charge power supply; a comparing module for determining the current charge status based on the detected charging state. By employing the charger or the charge status indicator for a charger, a primary-side feedback control Flyback SMPS may be employed, just a simple and reliable circuit is needed, and higher efficient can be achieved.
摘要翻译：本发明涉及充电状态指示器和充电器。充电器包括充电电源和充电状态指示器，其中，充电状态指示器包括用于监视连接在变压器的初级绕组和地之间的充电状态的检测芯片和用于显示充电状态的显示模块，其中，所述用于监视充电状态的检测芯片包括：检测模块，用于检测充电电源的充电状态; 比较模块，用于基于检测到的充电状态确定当前充电状态。通过使用充电器或充电器的充电状态指示器，可以采用初级侧反馈控制反激式SMPS，只需要简单可靠的电路，并且可以实现更高的效率。

10. 发明授权

US08599581B2 Primary-side regulated modulation controller with improved transient response and audile noise 有权
标题翻译：初级侧调节调制控制器具有改善的瞬态响应和音响噪声
公开(公告)号：US08599581B2
公开(公告)日：2013-12-03
申请号：US13398832
申请日：2012-02-16
申请人： Yuquan Huang , Matthew Man Ho Ku
发明人： Yuquan Huang , Matthew Man Ho Ku
IPC分类号： H02M3/335
CPC分类号： H02M1/44 , H02M3/33523 , H02M2001/0019 , H02M2003/1566
摘要： A switching mode power supply, and a primary-side controlled PFM converter using the primary-side regulated PFM controller are discussed. In present embodiment, the primary side cycle by cycle switch peak current is no longer a constant. The time detector is added to monitor the waveform of primary-side sample voltage and then generate the duty cycle. The transfer function should be selected to satisfy a specific relationship of switching frequency and switch peak current against with output loading current. The new design shows higher switching frequency but lower value of switch peak current at light load condition. This resolves the audible noise and poor transient response issue from the prior art PFM controller.
摘要翻译：讨论了开关模式电源和使用初级侧调节PFM控制器的初级侧控制PFM转换器。在本实施例中，通过循环开关峰值电流的初级侧循环不再是常数。添加时间检测器来监测初级侧采样电压的波形，然后生成占空比。应选择传递函数以满足开关频率和开关峰值电流与输出负载电流的具体关系。新设计显示较高的开关频率，但在轻负载条件下开关峰值电流值较低。这解决了现有技术的PFM控制器的可听噪声和差的瞬态响应问题。

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