Dear PI Expert,
We are designing a solution that use LNK306DG-TL , we experince a very high temperature in a short period of time ( 30min Appr.) , attached is the schematic, we noticed that D4 is DIODE U.FAST Single 1A 1000V SMT DO214AC (SMA) is Trr is < 100ns in the schematic , so we changed to STTH1R02A DIODE U.FAST Single 1.5A 200V SMT DO214AC (SMA), Trr 15ns.
Also we tried to change coils L1-L2 ,they were FPI0503-102K INDUCTOR FIXED 1mH 310MA 8 OHM SMD so we changed to RC0810U-102K INDUCTOR FIXED 1MH 750mA 10% RADIAL,
after using the new Diode and new fixed inductor , temperature are good so far in the first few hours , but diode reach 75-80 C degree. please advice as we were been testing for weeks.
Please let us know if you still need any other information,