专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明公开

EP2238809A2 LED DRIVER CIRCUIT AND METHOD, AND SYSTEM AND METHOD FOR ESTIMATING THE JUNCTION TEMPERATURE OF A LIGHT EMITTING DIODE 失效
标题翻译： LED驱动电路以及估计的温度防渗透的LED的方法和系统及方法
公开(公告)号：EP2238809A2
公开(公告)日：2010-10-13
申请号：EP09705382.1
申请日：2009-01-27
申请人： NXP B.V.
发明人： HOOGZAAD, Gian , SCHMITZ, Hans , LANGESLAG, Wilhelmus, H., M. , SURDEANU, Radu
IPC分类号： H05B33/08
CPC分类号： H05B33/0818 , G01K7/01
摘要： A driver circuit (10) for a light emitting diode comprises a first driver circuit (32, 32', 32') for generating a first current output for driving the light emitting diode, wherein the first driver circuit has a control switch for interrupting the supply of the first current output. A second driver circuit (50) is for generating a second current output for driving the light emitting diode, and the second driver circuit also has a control switch for interrupting the supply of the second current output. The overall output of the driver circuit comprises a pulse width modulated output current which alternates between a high current (I
high ) generated by the first driver circuit and a low current (I
|OW ) generated by the second driver circuit. By providing separate driver circuits for two different current requirements, the circuits can be optimised for each function. For example the high current value can comprise an LED operation current, and the low current value can comprise a non-zero measurement current.
摘要翻译：用于发光二极管的驱动器电路（10），用于产生第一电流输出用于驱动所述发光二极管，worin第一驱动器电路包括第一驱动电路（32，32”，32' ）具有用于中断控制开关供给所述第一电流输出的。第二驱动电路（50）是用于生成用于驱动发光二极管的第二电流输出，因此，第二驱动器电路具有用于中断第二电流输出的供给的控制开关。驱动电路的整体输出包括脉冲宽度调制电流输出由所述第二驱动器电路产生的第一驱动器电路和一个低电流（I低）产生的高电流（I高）之间交替哪个。通过为两个不同的电流的要求提供单独的驱动器电路，该电路可以被优化用于每个功能。对于实施例的高电流值可以包括LED操作电流，以及低电流值可包括一个非零测量电流。

IPRDB

热门服务

关于我们

友情链接

联系方式