Hi! > > That's not actually 100% clear to me - for what the wm831x is doing it > > probably *does* want the higher limit. This is a system inflow limit > > (as it should be for this), at least the charger will adapt to voltage > > variations though other users in the system are much less likely to do > > so. > > Interesting ... I hadn't considered that possibility. > > As long as the current remains below the maximum, the charger will > reduce the voltage towards 2V as load increases. Somewhere before it > gets there, the system will not be able to make use of the power as the > voltage will be too low to be usable. So that will naturally limit the > current being drawn. > > Not having very much electrical engineering background, I cannot say for > sure what will happen, but it seems likely that once the voltage drops > much below 4.75V, the charger won't be operating at peak efficiency, > which would be a waste. > I can easily imagine that the hardware would switch off at some voltage > level, rather than just making do with what is there. > So I'm skeptical of this approach, but I'm open to being corrected by > someone more knowledgeable than I. Devices I seen charge down to ~4.2V. This is useful thing to play with: dx.com: 406496 1" USB Current & Voltage Detector Tester Meter w/ Red LED Display - Blue Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
