In my previous message, I wrote:

> Bipolar transistors have negative temperature coefficient,
> i.e. resistance goes down as they heat up. For two paralleled outputs,
> the one with lower on-resistance will take more current, and will heat
> up more, resistance becomes even lower, etc. The positive feedback
> quickly causes current imbalance.
>
> MOSFETs are different, and have positive temperature coefficient, so
> from this point of view, their outputs can be paralleled. However,
> there can be other problems with paralleling MOSFETs.

I just realized I switched the words "positive" and "negative" - sorry
if it caused any confusion.

 -- Martin Nilsson