the root cause of flip-flop charging logic if you insert wall charger
andy at openmoko.com
Thu Sep 18 10:54:06 CEST 2008
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Somebody in the thread at some point said:
| Andy Green wrote:
|> I took pictures of it when I did the destructive test, here is repeated
|> insertion of adapter.
| Hmm, couldn't this be just the adapter's regulation getting started,
| charging internal capacitors, and all that ? The charger seems to
| have an output capacitance of something like 1000-1500uF.
The charger was plugged into the wallsocket all the time, it's dealt
with its inrush current hours ago. I was sat there plugging and
unplugging on USB socket side.
|> It seems doubtful the 500mA USB limit that is meant to be active from
|> cold actually is.
| Could be. We also have a bunch of specification-violatingly large
| capacitors right on VBUS, which certainly don't make things easier.
A 2A-capable wallcharger should just blow right through them.
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