Hi!
Im currently working on the Buck converter part of a larger circuit, but im having some trouble with it.
First i took the example circuit from the datasheet and assembled it on a perfboard. I tried to reduce stray inductance as far as i could and generally sorted everything in such a way it should be fine at the low 100kHz it would run for the first tests. Sadly it was killing the high side driver of the ltc as soon as it started switching.Rising the input voltage slowly and limiting the current did not help, protecting the driver section from overvoltage, positive o negative didnt have any effect.
Now i finally have the board with the final high current components, the logic part was rebuilt completely on perfboard again. and stacked on top for testing. I hoped that i just made a simple mistake in assembly, but in this entirely new setup exactly the same is happening.
My Problem is, that the LTC will not survive long enough for any measurements to be made. Every shot costs about 5€, which is starting to be the most expensive part of the projects, i think by now i ruined 10 of them trying to ind a mistake.
Does anyone have an idea on how to approach this? Im not really asking for an exact solution to my problem, more like advice what to do in such a situation.
Hopefully some of you guys can help.
cheers