LED driver for 7W.

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Dear All,

 

Would you please help to check my design spreadsheet as attached it's suitable or not?

 If you have any suggestion let me know freely. Thank you very much.

 

Spec :

Input :230Vac Output : 21V 330mA non-Isolated. 

 

Chalong 

첨부 파일Size
LinkSwitch-PL Buck.pdf111.75 KB

The input and output voltage ratio is too low for the buck converter application.

Since you want to use RM6S transformer, it might be better for you to use flyback converter instead buck converter