On Tue, Apr 28, 2009 at 15:36, Joerg Reisenweber <[email protected]> wrote:
> > That's nonsense as there is no dumb charger out there not being capable of > supplying 500mA. OTOH any management of maximum ingress current to USB by > whatever means will inevitably fail when unplugging the charger device > connected to FR during powerdown and replace it with a (nonexistent) weaker > one. I have several car chargers rated 350mA max. (Though I admit pulling 500mA generally works) And what if the "charger" is a small usb host device... like a Freerunner ? Or a solar panel ? Or you have 2 phone charging from the same usb port ? I usually charge from a car charger and when I want to charge faster than 500mA from usb (so ~300mA to battery with phone on), I have to push usb limit to 1A. But as it is too much for my poor charger, I also limit battery charge current (ex 500mA). This way I have about 700-750mA pulled from my charger (though it can peak to 1A as needed). Note than doing this (I used a little GUI with 1 set button for each value), I must set usb current limit, then only I set charge current limit. And in the meanwhile, since charge limit=usb limit=1A, it starts pulling about 1A and I cannot avoid that.
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