Subject: Re: Power supply question
Date: Wed, 2 Oct 2002 10:07:30 +0200
Organization: Rhodes University, Grahamstown, South Africa
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NNTP-Posting-Date: Wed, 2 Oct 2002 08:09:17 +0000 (UTC)
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Robert Baer wrote in message
: Chris wrote:
: > If I connect a device that draws <140mA to a power supply that is
: > marked as being a 20A supply, is that too much current for this
: > device? Thanks in advance.
: The supply is *rated* at 20A, which means that the output voltage will
: not drop excessivly (or will be regulated, if it is a regulated supply)
: at full load of 20A.
: This has *NOTHING* to do with any piddleant wimpy load.
Things would get festive, however, if the power supply was in fact a current
not a voltage source!
Note to OP: This is probably not the case, and is not meant to be
Follow the advice of the regulars, and consider my post merely ironic
You almost certainly have a voltage source [and if it is a desk-top kind of
it probably has some sort of adjustable current limiter built in, which you
if you really want to], and so only the case of an SMPS with minimum load
btw: a device that nominally draws 140mA would probably not like 20A very
much, but as
it has been said, 20A is the max you can draw from the PS, not what the PS