Charging Neo Freerunner via USB port

Steven Milburn steven.milburn at
Mon Apr 21 15:44:10 CEST 2008

Good news, you're likely wrong :)

Don't project the current draw when on the charger to when on the battery.

It's very normal for the charger portion of a PMIC to be extremely
in-efficient.  I typically see less than 50% efficiency on chargers.  The
power system will be optimized for running off the battery, but charger
power is usually seen as a free an infinite resource for the phone. It's not
worth the cost and area to optimize the power usage from the charger, so
it's almost never done.

--Steve M

On Sat, Apr 19, 2008 at 9:24 AM, "Marco Trevisan (Treviño)" <mail at>

> Mhmhm... Does this mean that the freerunner uses about 100mA to stay on
> standby? And... Then that in about 12 hours of simple standby its battery
> will be out? :o
> I really hope I'm wrong...
> --
> Treviño's World - Life and Linux
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> Openmoko community mailing list
> community at
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