LED backlight resistors for NHD-C12864A1Z-FS(RGB)-FBW-HT1

Comments

4 comments

  • Engineering Support
    Community moderator

    Hi,

    The NHD-C12864A1Z-FS(RGB)-FBW-HT1 has 0-ohm resistors available for the RGB Cathode pins 10,11, and 12. For which thee resistance on these pins can be changed to limit the LEDs and adjust the color.

    The additional resistors (shown above in the drawing of the backlight circuit) limit the current internally to the values indicated by the Electrical Characteristics table.

    Which also provides the typical forward voltage for the RGB LEDs to be 3.3V.

     

    Please let me know if you would like further clarification.

     

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  • Akshay James

    Hi, 

    Okay, so if I use 3.3V for the LED common anode pin, I can simply leave the 0 ohm as it is, right?

    The additional resistors should limit the current internally I guess. Can you please let me know your comments?

     

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  • Engineering Support
    Community moderator

    Hi,

    Yes, it is okay to connect the display anode pin directly 3.3V and the cathode pins for RGB to ground without an additional resistor.

    Any additional resistance to the 3 cathode pins can serve to adjust the color hue of the backlight.

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  • Akshay James

    Hi, thank you for the detailed explanation. This helps....

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