公开(公告)号：US20100295478A1

公开(公告)日：2010-11-25

申请号：US12706007

申请日：2010-02-16

申请人： Tian Yi WEI ,  Shrek WANG ,  Andrew JIANG ,  Hai Bo QIAO ,  Wilhelmus CORNELISSEN ,  Jack JIANG

发明人： Tian Yi WEI ,  Shrek WANG ,  Andrew JIANG ,  Hai Bo QIAO ,  Wilhelmus CORNELISSEN ,  Jack JIANG

IPC分类号： H05B41/36

CPC分类号： H05B33/0815 ,  H05B33/0848 ,  Y02B20/383

摘要： The present invention provides a LED driving circuit, which is adapted to be coupled to a power supply via a phase control dimmer. The driving circuit comprises a power switch unit and a control unit, wherein the control unit comprises a first signal sampling module, a frequency converting module, a feedback module and a PWM module, the first signal sampling module being configured to sample a first signal and to provide the first signal to the frequency converting module; the frequency converting module being configured to generate a second signal in response to the first signal and to provide the second signal to the PWM module; and the feedback module being configured to sample a third signal and to provide the third signal to the PWM module; the PWM module being configured to generate a fourth signal in response to the second signal and the third signal, so as to control the output current of the power switch unit, the frequency of the fourth signal being determined by the second signal and the duty cycle of the fourth signal being determined by the third signal.

摘要翻译： 本发明提供了一种LED驱动电路，其适于通过相位控制调光器耦合到电源。 所述驱动电路包括电源开关单元和控制单元，其中所述控制单元包括第一信号采样模块，频率转换模块，反馈模块和PWM模块，所述第一信号采样模块被配置为对第一信号进行采样， 以向所述频率转换模块提供所述第一信号; 所述频率转换模块被配置为响应于所述第一信号产生第二信号，并将所述第二信号提供给所述PWM模块; 并且所述反馈模块被配置为对第三信号进行采样并将所述第三信号提供给所述PWM模块; PWM模块被配置为响应于第二信号和第三信号产生第四信号，以便控制功率开关单元的输出电流，第四信号的频率由第二信号和占空比确定 的第四信号由第三信号确定。