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    • 10. 发明专利
    • Led driving device
    • LED驱动装置
    • JP2012071712A
    • 2012-04-12
    • JP2010218618
    • 2010-09-29
    • Rohm Co Ltdローム株式会社
    • AOKI HIROSHIMIYAMOTO KOJI
    • B60Q1/44H01L33/00
    • H05B33/0809B60Q11/005H05B33/0845H05B33/089
    • PROBLEM TO BE SOLVED: To provide an automobile LED driving device that can easily adjust an output current with high accuracy.SOLUTION: The automobile LED driving device includes: a current setting unit 80 for setting multiple reference currents IL, IH independently from each other for multiple respective current setting resistors RL, RH which are connected externally; a current controller 40 for selecting one of the multiple reference currents IL, IH based on a stop signal STOP inputted from the outside; and an output transistor 10 to control the output current IOUT to a light-emitting diode line LED 1 connected externally based on the reference current IREF selected by the current controller 40.
    • 解决的问题:提供能够以高精度容易地调节输出电流的汽车LED驱动装置。 汽车LED驱动装置包括:电流设定单元80,用于相互独立地设置多个参考电流IL,IH,用于外部连接的多个相应的电流设置电阻器RL,RH; 电流控制器40,用于根据从外部输入的停止信号STOP选择多个参考电流IL,IH中的一个; 以及输出晶体管10,用于基于由电流控制器40选择的参考电流IREF来控制到外部连接的发光二极管线LED 1的输出电流IOUT。(C)2012,JPO&INPIT