Re: Isolated power supply design

"Ethan" <idethan@xxxxxxxxx> wrote in message
news:1126146603.293999.49230@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hello:
>
> I am just staring on a new design for a medical instrument and need to
> figure out the power supplies.
> It needs to be a universal input, 85Vac-265Vac, and dc output. The
> load will vary between 0 and approximately 30W. For now I am thinking
> the output voltage should be a loosely regulated 9V since this is a
> convenient starting place for all the other supplies I will need.
>
> What do you guys think?
>
> Ethan Petersen
>
Ethan

Can you clarify something?

Do you need 30W at the patient applied part? Or does the entire instrument
draw appx. 30W
and you need less power at the patient site?

Design of a whole instrument for 10microamps is lots harder than design of a
small sensor or other probe.

Regards
PN2222A

"Been there.
Done that.
Got the 483."


.

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