Tool/software:
Hey Everyone
I am currently facing an issue with high power LED-driver circuit:
The Output is connected to a Led string with a total forward voltage of around 26V and the current in this case is 1.5 A
Looking at the voltage measured over the output resistor (yellow) as well as the FB pin of the LM5157 (green) I get the following result:
Now for a lower duty cycle the output current is way more constant and does not ripple nearly as much as in this high power case.
I already tried to alter different parts of the circuit but i don't really find a satisfying result.
Do you have input on where the problem might be and which parts of the circuit I can tweak.
If you need any more information on the test setup don't hesitate to ask.
Help is highly appreciated!
All the best,
Florian
