公开(公告)号：US20120229045A1

公开(公告)日：2012-09-13

申请号：US13413928

申请日：2012-03-07

申请人： Hiroki KIKUCHI ,  Jung-Nam IN ,  Min-Ki AHN

发明人： Hiroki KIKUCHI ,  Jung-Nam IN ,  Min-Ki AHN

IPC分类号： H05B37/02

CPC分类号： H05B33/0827 ,  H05B33/0818 ,  H05B33/0851 ,  Y02B20/347

摘要： A control circuit of a switching power supply for supplying a drive voltage to a light emitting element is provided. The control circuit includes a pulse width modulator which generates a pulse signal whose duty ratio is adjusted such that a detection voltage corresponding to an output voltage of the switching power supply is equal to a predetermined reference voltage, a driver which drives a switching element of the switching power supply based on the pulse signal, and a standby control unit which stops driving of the switching element once a predetermined time has passed after a standby signal steps down to a level indicating a standby state, and to shut down the control circuit and a current source.

摘要翻译： 提供了用于向发光元件提供驱动电压的开关电源的控制电路。 该控制电路包括脉冲宽度调制器，该脉冲宽度调制器产生其占空比被调整为使得与开关电源的输出电压相对应的检测电压等于预定的参考电压的脉冲信号，驱动该开关电源的开关元件的驱动器 基于脉冲信号的开关电源;以及备用控制单元，其在待机信号降低到指示待机状态的电平之后经过预定时间后停止开关元件的驱动，并且关闭控制电路和 当前来源。