My circuit has an input range of 11.8 - 28 vdc. I have 2 types LEDs that I would like to place in this circuit.
The first has a VF Typ of 3.4v and an Idrawnom of .150 A The second has a VF Typ of 2.2v and an Idrawnom of .150 A
(Link to data sheet) http://www.optekinc.com/datasheets/OVS5MABCR4.pdf
I have 2 sections in my PCB.
In one section I would like to put 4 of each color. In the other section put 20 of each of these.
These LEDs could be considered to be on all of the time after power up.
I am trying to figure out what would be the most efficient use of power and determine the series parallel configuration. PWM is a possibility if needed.
The large swing in the input voltage is why I am asking this question. If it were only 12v or 24v then the answer would be straight forward. Also if I was not concerned about efficiency / power distribution it would easy as well.
Also I am trying to stay away from the use of LED drivers vs PWM because of the code rewrite involved.