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racer
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      09-06-2007, 05:44 PM
hi

the usb suplies power when the main power is off

what current (ma) does it supply?

 
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HH
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      09-07-2007, 07:29 PM
It certainly should NOT be supplying power with the system shut down.
Something is very wrong there. Dunno about milliamperes but it is 5V, IIRC.

HH


"racer" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
> hi
>
> the usb suplies power when the main power is off
>
> what current (ma) does it supply?
>



 
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William R. Walsh
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      09-26-2007, 04:34 AM
HI!

> It certainly should NOT be supplying power with the system shut
> down.


Whoa there...some desktop systems *do* in fact keep their USB ports powered
when the power is "off". This is probably perfectly normal and nothing to be
worried about.

> Something is very wrong there. Dunno about milliamperes but it is 5V,
> IIRC.


The official spec for USB is 500mA at 5 volts DC. Most ports will stand
more. If your computer keeps the ports energized when turned "off", you may
not want to put a heavy load on them, as they may be getting power from the
+5 volt standby supply.

William


 
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