tlc5940 - sharing IREF resistor when daisy-chaining

Thread Starter


Joined Aug 15, 2016
hello, I'm daisy-chaining 10 tlc5940 led drivers.
I've calculated the required iref value to be 2.2k ohm.
right now I'm using 10 resistors. one for each led driver.

I was wondering: is it possible (and advisable?) to use just a single resistor to control the IREF of all tlc5940 led drivers in my circuit, or does every driver require its own IREF resistor, even though the resistor values are the same across all chips?

thank you.