GTA02 USB and battery current profile

[Werner Almesberger]

Felipe Balbi wrote:
> It doesn't depend only on usb power constraints, it has more to do with
> your pm chip.

Yeah, that's what I meant. The interesting thing is that the PMU
should basically handle all this automatically.

> I had a device that could charge with up to 1A if connected to a
> dedicated charger, although we can charge with up to 2.5A in that
> situation.

Our old charger (internal use only, I think) had a current limit of
1A. The new one does 2A. However, the PCF50633 only lets us choose
100mA/500mA/1A for USB power, so that's all we can do easily.

Our battery pack has a standard charge current of 600mA and a fast
charge current of 1200mA, so 1A is sufficient for a standard charge
plus keeping the system running.

- Werner