Replacement for QP1008 (HP9816 PSU)

[Eric Smith]

Rik wrote:
> The PSU isn't build by HP but by RTE POWER/MATE a firm with doesn't exist
> any more.

That explains it.  If HP bought the PSU as an assembly, there wouldn't
be HP part numbers for its components, as it would be considered a single
FRU.

>From Tony's schematic, I'd guess that it's a semi-custom part.  Motorola
probably binned one of their standard parts to a higher spec for RTE.

Perhaps you can look at schematics for other switching PSUs
with similar ratings and determine what transistor they use.  The
safety-critical parameters are breakdown voltage and maximum current.
If the PSU is rated at less than 500W, I suspect you could use a BU208A,
which costs less than $3 from Digikey, but don't take my word for it.

Eric