Kontentan är dock "YOU NEED TO PROVIDE REGULATED 12V TO THE PW200M TO PREVENT DAMAGING THE COMPONENTS POWERED BY IT, BECAUSE THE PW200M DOES NOT REGULATE THE 12V RAIL." som det står med STORA bokstäver på sida 2.
Synnerligen intressant var denna fråga som besvarades av tillverkaren:
Just for the sake of amusement, here's an email I sent to the PW-200 manufacturers months ago:
Quote:
How exactly do you justify rating the PW200 supplies at 200W if you
don't even regulate the 12v line? saying that almost 3/4 of the power
rating of your supply is coming from the unregulated input that is
simply switched, is rather misleading. I assume that the 12A rating
on the 12v line is only due to the switching transistor? in which
case, you could drop in a transistor with higher current rating and
then rate the thing at 300W or more.
so basically you have a 60-watt supply with a 12v/12A switch... and
personally I've never heard anyone include what is essentially nothing
more than a power switch in the power rating of their computer... for
instance, my shutdown controller has a relay that can switch around 10
amps at 12 volts, to power various peripherals... but I wouldn't call
the SDC a 120 watt power supply...
and here is their reply:
Quote:
That's true, there is a little bit of marketing here, but anybody that makes
12V DC-DC converters can claim that.
This is a 'switching" power supply, it just happens that the 12V rail is
permanently switched.
There is no regulation but there is UVP and OVP protection.
