公开(公告)号：US20120139422A1

公开(公告)日：2012-06-07

申请号：US13371375

申请日：2012-02-10

申请人： Zhimou REN ,  Ching-Chuan KUO ,  Tiesheng YAN ,  Yunning XIE ,  Jun REN

发明人： Zhimou REN ,  Ching-Chuan KUO ,  Tiesheng YAN ,  Yunning XIE ,  Jun REN

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： Embodiments of the invention provided a driving circuit for powering a light-emitting diode (LED) light source. The driving circuit includes a rectifier, a s filter capacitor, and a control circuit. The rectifier converts an AC voltage from an AC power source to a rectified AC voltage. The filter capacitor coupled to the rectifier filters the rectified AC voltage to provide a DC voltage. The control circuit controls power supplied to the LED light source. The control circuit enables a discharging current periodically to discharge the filter capacitor if a switch coupled between an AC power source and a rectifier is turned off and disables the discharging current if the control circuit determines that the switch is turned on.

摘要翻译： 本发明的实施例提供了一种用于为发光二极管（LED）光源供电的驱动电路。 驱动电路包括整流器，滤波电容器和控制电路。 整流器将AC电压从AC电源转换为整流的AC电压。 耦合到整流器的滤波电容器对整流的AC电压进行滤波以提供DC电压。 控制电路控制提供给LED光源的电力。 如果连接在AC电源和整流器之间的开关被断开并且如果控制电路确定开关导通而禁止放电电流，则控制电路使能放电电流周期性地对滤波电容器放电。

公开(公告)号：US20130300307A1

公开(公告)日：2013-11-14

申请号：US13608273

申请日：2012-09-10

申请人： Zhimou REN ,  Yunning XIE ,  Jun REN ,  Ching-Chuan KUO

发明人： Zhimou REN ,  Yunning XIE ,  Jun REN ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H02M1/4258 ,  Y02B70/126

摘要： A controller for controlling a power converter includes a signal generator and a driver. The power converter receives an input voltage and provides an output voltage to power a load. The signal generator receives a sense signal indicating a current flowing through the power converter, receives a detection signal indicating whether the power converter operates in a predetermined state, and generates a square wave signal according to the sense signal and the detection signal. The square wave signal has a first voltage level proportional to a peak level of the current when the power converter operates in the predetermined state; otherwise, the square wave signal has a second voltage level. The driver generates a driving signal based on the square wave signal to control a current flowing through the load.

摘要翻译： 用于控制功率转换器的控制器包括信号发生器和驱动器。 功率转换器接收输入电压并提供输出电压来为负载供电。 信号发生器接收指示流过功率转换器的电流的感测信号，接收指示功率转换器是否以预定状态工作的检测信号，并根据感测信号和检测信号产生方波信号。 当功率转换器在预定状态下工作时，方波信号具有与电流的峰值电平成比例的第一电压电平; 否则，方波信号具有第二电压电平。 驱动器基于方波信号产生驱动信号，以控制流过负载的电流。

公开(公告)号：US20110140616A1

公开(公告)日：2011-06-16

申请号：US12823269

申请日：2010-06-25

申请人： Tiesheng YAN ,  Zhimou REN ,  Jun REN ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Zhimou REN ,  Jun REN ,  Ching-Chuan KUO

IPC分类号： H05B37/00 ,  H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0821 ,  H05B33/0842 ,  Y02B20/347

摘要： A driving circuit for driving a light source includes a power converter, a controller and a voltage-controlled current source. The power converter is coupled to the light source, and receives an input voltage from a power source and provides an output voltage to the light source. The power converter includes a switch coupled in series with the light source. The controller is coupled to the power converter and controls a power of the light source by controlling the switch. The voltage-controlled current source is coupled to the controller and provides a first current. The controller controls the switch based on the first current.

摘要翻译： 用于驱动光源的驱动电路包括功率转换器，控制器和压控电流源。 功率转换器耦合到光源，并且从电源接收输入电压并向光源提供输出电压。 功率转换器包括与光源串联耦合的开关。 控制器耦合到功率转换器，并通过控制开关来控制光源的功率。 电压控制电流源耦合到控制器并提供第一电流。 控制器根据第一个电流控制开关。

公开(公告)号：US20110080119A1

公开(公告)日：2011-04-07

申请号：US12967933

申请日：2010-12-14

申请人： Tiesheng YAN ,  Ching-Chuan KUO ,  Zhimou REN ,  Jun REN

发明人： Tiesheng YAN ,  Ching-Chuan KUO ,  Zhimou REN ,  Jun REN

IPC分类号： H05B41/36

CPC分类号： H05B33/0815

摘要： A circuit for driving a light source, e.g., an LED light source, includes a converter, a sensor, and a controller. The converter converts an input voltage to an output voltage across the LED light source based upon a driving signal. A duty cycle of the driving signal determines an average current flowing through the LED light source. The sensor is selectively coupled to and decoupled from the converter based upon the driving signal. The sensor generates a sense voltage indicative of a current flowing through the LED light source when the sensor is coupled to the converter. The controller is coupled to the converter and sensor. The controller compares the sense voltage to a reference voltage indicative of a predetermined average current through the LED light source to generate a compensation signal and generates the driving signal based upon the compensation signal. The duty cycle of the driving signal is adjusted based upon the compensation signal to adjust the average current flowing through the LED light source to the predetermined average current.

摘要翻译： 用于驱动例如LED光源的光源的电路包括转换器，传感器和控制器。 转换器基于驱动信号将输入电压转换成LED光源两端的输出电压。 驱动信号的占空比确定流过LED光源的平均电流。 基于驱动信号，传感器选择性地耦合到转换器并从转换器去耦。 当传感器耦合到转换器时，传感器产生指示流过LED光源的电流的感测电压。 控制器耦合到转换器和传感器。 控制器将感测电压与表示通过LED光源的预定平均电流的参考电压进行比较，以产生补偿信号，并基于补偿信号产生驱动信号。 基于补偿信号调整驱动信号的占空比，以将流过LED光源的平均电流调整到预定的平均电流。

公开(公告)号：US20120243269A1

公开(公告)日：2012-09-27

申请号：US13443786

申请日：2012-04-10

申请人： Zhimou REN ,  Ching-Chuan KUO ,  Jianlong GAO ,  Xinmin YI ,  Yunning XIE

发明人： Zhimou REN ,  Ching-Chuan KUO ,  Jianlong GAO ,  Xinmin YI ,  Yunning XIE

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： A circuit includes a transformer and a controller. The transformer includes a primary winding and a secondary winding, and operates in multiple switching cycles. A switching cycle includes a charging period and a discharging period. During the charging period, the transformer is powered by the input voltage and a current flowing through the primary winding increases. During the discharging period the transformer discharges to power the load and a current flowing through the secondary winding decreases. The controller includes a pin that receives a first feedback signal indicating the input voltage during the charging period and receives a second feedback signal indicating an electrical condition of the secondary winding during the discharging period. The controller generates a first control signal and a second control signal to regulate the input voltage and an output current flowing through the load, respectively.

摘要翻译： 电路包括变压器和控制器。 变压器包括初级绕组和次级绕组，并在多个开关周期中工作。 开关周期包括充电期间和放电期间。 在充电期间，变压器由输入电压供电，流过初级绕组的电流增加。 在放电期间，变压器放电给负载供电，流过次级绕组的电流减小。 控制器包括一个引脚，该引脚在充电期间接收指示输入电压的第一反馈信号，并且在放电期间接收指示次级绕组电气状态的第二反馈信号。 控制器产生第一控制信号和第二控制信号，以分别调节输入电压和流过负载的输出电流。

公开(公告)号：US20130038227A1

公开(公告)日：2013-02-14

申请号：US13369620

申请日：2012-02-09

申请人： Tiesheng YAN ,  Feng LIN ,  Youling LI ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Feng LIN ,  Youling LI ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B33/0851 ,  H05B33/0818 ,  H05B33/0848

摘要： A driving circuit for controlling power of a light-emitting diode (LED) light source includes a transformer, a switch controller, and a dimming controller. The transformer has a primary winding that receives input power from an AC/DC converter and a secondary winding that provides output power to the LED light source. The switch controller coupled between an optical coupler and the primary winding receives a feedback signal indicative of a target level of a current flowing through the LED light source from the optical coupler, and controls input power to the primary winding according to the feedback signal. The dimming controller coupled to the secondary winding receives a switch monitoring signal indicative of an operation of a power switch coupled between an AC power source and the AC/DC converter, and regulates the output power by adjusting the feedback signal according to the switch monitoring signal.

摘要翻译： 用于控制发光二极管（LED）光源的功率的驱动电路包括变压器，开关控制器和调光控制器。 变压器具有从AC / DC转换器接收输入功率的初级绕组和向LED光源提供输出功率的次级绕组。 耦合在光耦合器和初级绕组之间的开关控制器接收表示从光耦合器流过LED光源的电流的目标电平的反馈信号，并且根据反馈信号控制到初级绕组的输入功率。 耦合到次级绕组的调光控制器接收指示耦合在AC电源和AC / DC转换器之间的功率开关的操作的开关监视信号，并且通过根据开关监视信号调整反馈信号来调节输出功率 。

公开(公告)号：US20120268023A1

公开(公告)日：2012-10-25

申请号：US13535561

申请日：2012-06-28

申请人： Tiesheng YAN ,  Ching-Chuan KUO ,  Yung Lin LIN

发明人： Tiesheng YAN ,  Ching-Chuan KUO ,  Yung Lin LIN

IPC分类号： H05B37/02

CPC分类号： H05B33/0815

摘要： A driving circuit for driving a light-emitting diode (LED) light source includes a buck-boost converter and a controller. The buck-boost converter receives an input voltage and an input current and powers the LED light source, and comprises a switch controlled by a driving signal. The controller receives a first signal indicating a current through the LED light source, and generates the driving signal based on the first signal to control the switch and to adjust the current through the LED light source. The buck-boost converter further comprises a current sensor which provides a second signal indicating an instant current flowing through the buck-boost converter, wherein the first signal is derived from the second signal, and wherein a reference ground of the controller is different from a ground of the driving circuit.

摘要翻译： 用于驱动发光二极管（LED）光源的驱动电路包括降压 - 升压转换器和控制器。 降压 - 升压转换器接收输入电压和输入电流并为LED光源供电，并包括由驱动信号控制的开关。 控制器接收指示通过LED光源的电流的第一信号，并且基于第一信号产生驱动信号，以控制开关并调节通过LED光源的电流。 所述降压 - 升压转换器还包括电流传感器，其提供指示流过所述降压 - 升压转换器的即时电流的第二信号，其中所述第一信号从所述第二信号导出，并且其中所述控制器的参考地不同于 地面的驱动电路。

公开(公告)号：US20120139433A1

公开(公告)日：2012-06-07

申请号：US13371351

申请日：2012-02-10

申请人： Tiesheng YAN ,  Ching-Chuan KUO ,  Feng LIN ,  Jianping XU

发明人： Tiesheng YAN ,  Ching-Chuan KUO ,  Feng LIN ,  Jianping XU

IPC分类号： H05B37/02

CPC分类号： H05B41/2821 ,  H05B33/0815 ,  H05B37/02 ,  H05B41/2822

摘要： A circuit for driving a light-emitting diode (LED) light source includes a converter, a saw-tooth signal generator, and a controller. The converter includes a switch which is controlled by a driving signal. The converter provides a sense signal indicating the current through said LED light source. The saw-tooth signal generator generates a saw-tooth signal based on the driving signal. The controller generates the driving signal based on signals including the saw-tooth signal and the first sense signal to adjust the current through the LED light source to a target level and to correct a power factor of the driving circuit by controlling an average current of the input current to be substantially in phase with said input voltage.

摘要翻译： 用于驱动发光二极管（LED）光源的电路包括转换器，锯齿信号发生器和控制器。 转换器包括由驱动信号控制的开关。 转换器提供指示通过所述LED光源的电流的感测信号。 锯齿信号发生器基于驱动信号产生锯齿信号。 控制器基于包括锯齿信号和第一感测信号的信号产生驱动信号，以将通过LED光源的电流调节到目标电平并通过控制驱动电路的平均电流来校正驱动电路的功率因数 输入电流与所述输入电压基本相同。

公开(公告)号：US20110133662A1

公开(公告)日：2011-06-09

申请号：US12761681

申请日：2010-04-16

申请人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815

摘要： A driving circuit includes a first inductor coupled in series with a light source for providing power to the light source. A controller coupled to the first inductor can control a switch coupled to the first inductor, thereby controlling a current flowing through the first inductor. A current sensor coupled to the first inductor can provide a first signal indicative of the current flowing through the first inductor, regardless of whether the switch is on or off. The switch is controlled according to the first signal. A second inductor magnetically coupled to the first inductor is also electrically coupled to the first inductor via a common node between the switch and the first inductor for providing a reference ground for the controller. The reference ground is different from the ground of the driving circuit.

摘要翻译： 驱动电路包括与用于向光源提供电力的光源串联耦合的第一电感器。 耦合到第一电感器的控制器可以控制耦合到第一电感器的开关，从而控制流过第一电感器的电流。 耦合到第一电感器的电流传感器可以提供指示流过第一电感器的电流的第一信号，而不管开关是开或关。 开关根据第一个信号进行控制。 磁耦合到第一电感器的第二电感器也经由开关和第一电感器之间的公共节点电耦合到第一电感器，以提供用于控制器的参考地。 参考地不同于驱动电路的地面。

公开(公告)号：US20120299502A1

公开(公告)日：2012-11-29

申请号：US13556690

申请日：2012-07-24

申请人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

发明人： Tiesheng YAN ,  Youling LI ,  Feng LIN ,  Xinhe SU ,  Ching-Chuan KUO

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815

摘要： A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.

摘要翻译： 用于控制光源的功率的控制器包括第一感测针，第二感测针，第三感测针和驱动针。 第一感测引脚接收指示流过能量存储元件的瞬时电流的第一信号。 第二感测针接收指示流过能量存储元件的平均电流的第二信号。 第三感测针接收指示瞬时电流是否降低到预定电流电平的第三信号。 驱动引脚向开关提供驱动信号，以将流过光源的平均电流控制到目标电流水平。 基于从第一信号，第二信号和第三信号中选择的一个或多个信号产生驱动信号。