公开(公告)号：US20110133661A1

公开(公告)日：2011-06-09

申请号：US12718210

申请日：2010-03-05

申请人： Zhimou REN ,  Jun REN ,  Yunning XIE ,  Tiesheng YAN ,  Feng LIN

发明人： Zhimou REN ,  Jun REN ,  Yunning XIE ,  Tiesheng YAN ,  Feng LIN

IPC分类号： H05B37/02 ,  H02M3/156

CPC分类号： H05B33/0884 ,  H05B33/0815 ,  H05B33/0851 ,  Y02B20/346

摘要： A power supply system includes a power converter, a switch, and a controller. The power converter is operable for providing power to a load. The switch is coupled to the power converter and is operable for adjusting the power to the load. The switch has a gate, a source and a drain. The controller is coupled to the switch and is operable for controlling a state of the switch. The controller has a first control terminal for providing a gate voltage to the gate of the switch, a second control terminal for providing a source voltage to the source of the switch, and an input terminal for receiving a supply voltage via the source of the switch. The controller is also operable for limiting the supply voltage within a predetermined maximum level by regulating the gate voltage to a preset level.

摘要翻译： 电源系统包括功率转换器，开关和控制器。 功率转换器可操作以向负载提供电力。 开关耦合到功率转换器，并且可操作用于调节负载的功率。 开关有一个门，一个源和一个漏极。 控制器耦合到开关并且可操作用于控制开关的状态。 控制器具有用于向开关的栅极提供栅极电压的第一控制端子，用于向开关源提供源极电压的第二控制端子以及用于经由开关源接收电源电压的输入端子 。 控制器还可操作用于通过将栅极电压调节到预设电平来将电源电压限制在预定最大电平内。

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：US20110157923A1

公开(公告)日：2011-06-30

申请号：US12712407

申请日：2010-02-25

申请人： Zhimou REN ,  Jun REN ,  Yunning XIE

发明人： Zhimou REN ,  Jun REN ,  Yunning XIE

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： A power converter includes a transformer operated in multiple switching cycles. At least one switching cycle includes a charging period, a discharging period, and an adjusting period. The transformer has a primary winding coupled to a power source and a secondary winding coupled to a load. During the charging period the transformer is powered by the power source 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. A ratio of a duration of the discharging period to a total duration of the charging period, the discharging period and the adjusting period is constant.

摘要翻译： 功率转换器包括在多个开关周期中工作的变压器。 至少一个开关周期包括充电周期，放电周期和调整周期。 变压器具有耦合到电源的初级绕组和耦合到负载的次级绕组。 在充电期间，变压器由电源供电，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。 放电期间的持续时间与充电期间的总持续时间，放电期间和调整期间的比率恒定。

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。