In your screenshot (which, by the way, can also be inserted as an image rather than as an attachment for easier recognition), you mention 240mA for the LED, but that does not match the value of R1. With 0.047ohms, it would result in 1.915A...2.128A. I then wonder how you get 22µA for L2?
You should better calculate and simulate this with the online tool eDesignsSuite to get correct values.
However, the component parameters are only the first, cautious step; the main problem is still to come: at a switching frequency of 850kHz, the layout plays an extremely important role. You should follow the guidance in the datasheet, sections 7.2 and 7.5.
Regards
/Peter
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