Replacement for QP1008 (HP9816 PSU)
eric at brouhaha.com
Mon Apr 14 16:58:57 CDT 2008
> 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
>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.
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