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I want to design LED driver using LYTSWITCH-1  family for 5W to 22W power. But I am not able to find formula for every components like filtering capacitors and inductor etc in data sheet or also LYTSWITCH-1  family is not in PIExpert. Plz help me.

You can use PI Expert Online to do the calculation. Below is the link:

Please also check Application Note AN67 for additional guidance.