GTA02 USB and battery current profile

[Felipe Balbi]

On Sun, Mar 09, 2008 at 02:29:21AM -0300, Werner Almesberger wrote:
> 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.

Ehehe, pm chips... you never know:-p

> 
> > 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.

Yeah, cool.
How are you triggering usb charging, btw?

> 
> - Werner

-- 
Best Regards,

Felipe Balbi
me at felipebalbi.com
http://blog.felipebalbi.com