drive & dimm 72 leds + 72 leds all in same accurate and controlled current.

[doronk]

hi,

i need to drive & dimm 72 leds (vf=3.2v ;0.35A) + 72 leds (vf=2.2v; 0.3A).

i want to use low Vin such as 24-48Vmax

There are so many combinations.
What is the simplest and cost effective way, for a simple drive and dimmer (by MCU).

i want to drive the leds by current, and make sure that each string has the exact same current.

i need to control the current value by MCU

Thanks in advance
Best regards

  

 

[TDK]

There are lots of LED drivers out there. Perhaps look for one that suits your needs.

https://www.st.com/en/power-management/led-drivers.html

https://www.analog.com/en/product-category/led-driver-ic.html

 

72 LEDs at 3.2V each is way above 48V. Going to need multiple strings.

[doronk]

Thanks !! 

i guess there is no shortcuts.. must consider the number of strings/voltage/cost/complexity... 

thanks again :)