Gordon Williams wrote:
> I'm going to be running a 48V (at 3W) boost converter and a 5V (at 5W) bu=
ck
> converter off of a 12 V battery.
>
> Is it a good practice to have a fuse on both supplies' inputs or just 1 f=
or
> the system?

It isn't a question of "practice" -- it's a question of what makes sense fo=
r
the particular system.

Does it make sense, or conversely, present any risk to have only one conver=
ter
working? If you want the whole thing to go dead if there's a fault on eithe=
r
converter, then use a single fuse.

On the other hand, you must also consider whether an overload on one conver=
ter
can reasonably be expected to blow a common fuse. If that fuse is too large=
,
then it may not make sense, and you'll actually need to create a seperate
interlock system that shuts everything down in the case of a fault.

There's no simple blanket answer for this sort of question.

-- Dave Tweed
--=20
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