NHD-2.4-240320CF-CSXN#-F backlight

tdziki

• February 10, 2021 10:07

Hello,

I have some doubts regarding NHD-2.4-240320CF-CSXN#-F datasheet notes.

6. Backlight: White LED / 3.1V / 100 mA ( Typ )

3.1V means:

a) backlight LEDs forward voltage ?
or
b) expected backlight source voltage  ?

I assume this means LED forward voltage.
Then, when powering backlight from 5V source the current limiting resistor should be (5V-3.1V) / 100mA = 19 ohms
Is that right ?

Thank you

0

• 

  Ted M.

  NHD Staff

  • February 10, 2021 11:07

  Hi,
  
  You are correct. The LED forward voltage or VLED is 3.1V.
  A 19 Ohm resistor will provide 100mA of current when a supply voltage of 5v is used to power the backlight and produce the 3.1VLED.
  
  Regards,

  0

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