What cause burned FET driver and FETS on 9920

[tom255]

I thougth same...
When i come home i will check cap on short circuit. hmm but on other side if in cap short circuit i supose that first thing what will burn its UBEC.
Anyway next week i will get parts so i try to resolder

[GriffinRU]

Driver can blow output FET's if it is overloaded and wasn't able top close FET fast enough, or didn't have built-in delay for protection... you can get the idea

CAP can course failing in driver if it doesn't have ESR low enough, Higher voltage caps have higher ESR then lower voltage ones.

It is always about balance, and drivers, FETS and CAP's are very sensitive to temperature you can finish the rest...

[BrianG]

Originally Posted by GriffinRU

CAP can course failing in driver if it doesn't have ESR low enough, Higher voltage caps have higher ESR then lower voltage ones

I was assuming the cap he was talking about was on a receiver plug, not part of the ESC. But maybe I read the post wrong...

[GriffinRU]

Originally Posted by BrianG

I was assuming the cap he was talking about was on a receiver plug, not part of the ESC. But maybe I read the post wrong...

My fault,

to tom255:
If you have bad cap in receiver it is very bad and there is no need to discuss what can happen to ESC, garbage in - garbage (smoke) out. Noise on input can kill any controller.

[zeropointbug]

Originally Posted by GriffinRU

Driver can blow output FET's if it is overloaded and wasn't able top close FET fast enough, or didn't have built-in delay for protection... you can get the idea

CAP can course failing in driver if it doesn't have ESR low enough, Higher voltage caps have higher ESR then lower voltage ones.

It is always about balance, and drivers, FETS and CAP's are very sensitive to temperature you can finish the rest...

Hence all these problems could be from the caps in these controllers... the more the merrier!