公开(公告)号：US20110221346A1

公开(公告)日：2011-09-15

申请号：US13096646

申请日：2011-04-28

申请人： Sheng Tai LEE ,  Yung Lin LIN ,  Chuan Chiung KUO

发明人： Sheng Tai LEE ,  Yung Lin LIN ,  Chuan Chiung KUO

IPC分类号： H05B37/02

CPC分类号： H05B33/0812 ,  Y02B20/345 ,  Y02B20/348

摘要： Embodiments in accordance with the present invention provide circuits and methods for driving light sources, e.g., a light-emitting diode (LED) light source. In one embodiment, a printed circuit board (PCB) includes a bridge rectifier rectifying an AC voltage to a rectified AC voltage, an LED light source, and a first switch coupled to the LED light source in series controlling a current through the LED light source according to a predetermined current reference. The LED light source and the first switch coupled in series receive the rectified AC voltage while the first switch is controlled linearly.

摘要翻译： 根据本发明的实施例提供了用于驱动光源的电路和方法，例如发光二极管（LED）光源。 在一个实施例中，印刷电路板（PCB）包括将AC电压整流到整流的AC电压的桥式整流器，LED光源和耦合到LED光源的第一开关，其串联地控制通过LED光源的电流 根据预定的电流参考。 LED光源和串联耦合的第一开关在第一开关线性控制的同时接收整流的交流电压。