I used MP24894GJ for my led driver design which has a cob led of 0.5A at Vf 36V.
For this current, each Vin/Rsense/L1/endim was 45V/0.33ohm/100uH/3.3V and the other parts were put just same as typical application of datasheet.
I hadn’t thought that I violated any part selection rules on datasheet in terms of mathematical calculation, but when my 45V power supply switched on, almost simultaneously, MP24894 was burned out with spark between RS pin and EN/DIM pin.
There were two same circuits for 2-channel control, and both got the same phenomenon, so I can only conclude that my design was wrong.
Please can anyone point out what’s the problem of my design and parts selection?