LM2576HV: LM2576HVSX-5.0/NOPB Performance problem

Hi Yingiao,

Thank you posting.  Sorry I am confused. Why do you expect it to turn yellow after reflow?  

Regards,

Youhao

Yes, why does this product change color after reflow soldering?

Hi Yingjiao,

Sorry I am confused.  Do you want to see it change color or not change color?  In your first post, your seemed questioning why product did not turn yellow after furnace.

Anyway, I talked to our expert, and he said the picture above looks okay, and the color may be just flux, or may be slight oxidation depending on how you tin the leads.  As long as you follow the recommended reflow profile, the circuit should be okay.

Thanks,

Youhao