Maybe i have calc wrong, if i have around max 60 Led each 10-20mA = 1200mA max. and that is 6 W ??

 

Did you miss this in the datasheet?


You cannot have more than two LEDs at 20mA on any output. Also, connecting parallel LEDs a constant current driver does not divide the current evenly among the LEDs.

I think you are trying too hard to use a chip that is not suited for your application. 10 to 20 mA LEDs do not need a constant current driver, a simple resistor is fine.

In the OP you said there were 7 LEDs connected to each output and only one output can be on at a time. Now you saying there are 50 to 60 LEDs in parallel. Those two statements cannot both be true.

You need to state your entire problem clearly and let us help you find a solution instead of asking us to fix your design, which is either fatally flawed or not described accurately.

I have correct 7 LED on each output., BUT never more than 1 active at a time, the POWER to each LED is controlled by the Mosfet. will have 7 mosfets driving up to 60 LED on each. Can provide a better schematics later, when i have done it.

 

That clarifies things a bit.

Then neither the 7 nor the 50 or 60 are in parallel. Parallel means both anode and cathode are connected together. So no two of your LEDs are in parallel.

What is the physical arrangement of the LEDs? Could strips be used? That could simplify it considerably.

 

That clarifies things a bit.

Then neither the 7 nor the 50 or 60 are in parallel. Parallel means both anode and cathode are connected together. So no two of your LEDs are in parallel.

What is the physical arrangement of the LEDs? Could strips be used? That could simplify it considerably.

What kind of strip do you think of ?
I am planing something like this , just with LEDs.

 

Well, it depends in the spacing of the adjacent LEDs. but…

That could all be done with addressable strips controlled directly by one output pin of the micro. Each straight segment can be a piece of a WS2812B strip, which can be cut at any place. The segments would all be joined in a single daisy chain. The strip does the PWM and constant current for you in full 24-bit color.

So far less wiring, no additional chips (just the micro) easier to install in place (peel and stick backing), more functionality (color), and likely cheaper.

The only negative I see is the spacing. There are only a few choices. But if one of them works for you, it is better in practically every way I can think of.

With about 10 diet cokes, I could probably put it together in one day.

 

Have got this designed, but get differnt value according to whom i ask,

Value for R15 and R16 ? 10k is someone say, other say 5k for both.
I am not sure how to calc it correct.