> This is for a grid tie inverter. I cannot share schematic but I can
> share ideas if you are interested.


Ohhh!! you work for TRACE..  The light goes on.  This isn't just some
silly  battery charger.


>The application is batteryless.
> The "grid" will be the battery of the future.

No doubt.  If we can ever get the Utilities to cooperate fully with
distributed power (some do already, some fight it tooth and nail)  I
think there will be a lot of call for this sort of thing.

>The problem with the
> '73a is the Vdd rise time spec. It must power up at 50V/sec to
> provide a valid internal power up reset. PV panels will often be
> MUCH slower than this. I am leaning toward an external protection.

I'd agree.  You are probably not as constrained by absolute lowest
cost, and can afford a few cents for a dedicated uP power controller.




>

-- Lawrence Lile

     "The ideal design has zero parts"  -
            (attributed to Harold Hallikainen)

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