SMPSU IC explosion... (UC3844)

[lee davison]

> So, given that assumption for now, anyone know of a likely fault
> in a typical SMPSU that might cause such a catastrophic chip
> failure but no other obvious damage?

The switching transistor has probably gone s/c which ends up
connecting the rectified mains to the switch output on the IC.
They tend not to last long when that happens.

Lee.











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