RE: Switching Power supply question

        That's not entirely true with switching power supplies. Most
switchers require a MINIMUM amount of current to be drawn in addition
to, of course, having a maximum amount of current that they can supply.
Most switching power supplies will not startup unless there is a minimum
load on it.

        I'm not sure where you got the 4 Amp number from, but if you're
talking about the draw on the +5V, then that's probably enough for the
supply to work.

Joe

-----Original Message-----
From: owner-rasterlist@synthcom.com
[mailto:owner-rasterlist@synthcom.com] On Behalf Of mccullar@flash.net
Sent: Tuesday, November 13, 2001 6:33 PM
To: rasterlist@synthcom.com
Subject: Re: RASTER: Switching Power supply question

>I just found (and subsequently purchased) a pretty neat 150W switching
>power supply from BG Micro. Here are the specs:
>
>+5V @ 22 amps
>+12V @ 8 amps
>-12V @ 2.5 amps
>+24V @ 4.5 amps
>
>And the page from their catalog:
>http://www.bgmicro.com/pdf/page25.pdf
>
>Now, I'd like to know if driving the PS at *only* 4 amps or so for a
>game will cause any problems for the supply? At first glance, it would
>seem ideal to work with Williams games, Gottlieb games, Atari games,
and
>I suspect a few others :)

As long as all the voltages are okay, Tom, this supply should work just
fine. Those current specifications tell you the maximum amount of
current
this power supply can deliver, if need be. It'll supply as many amps as
you
like -- up to that amount. You can pull half an amp, three amps,
fifteen,
20, with no trouble. Heck, with 22 amps, you can probably drive several
boardsets all at once! :)

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