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Originally Posted by BrianG
I'd imagine you got an "input voltage too low" message if it was a power supply issue. As the current goes up, the voltage output of the PS will start to fall depending on the build quaility. However, if it does that at a low 2A, that doesn't make sense.
I've also seen "output voltage too low" and haven't really figured out why it does that. From what I could tell, since the circuitry does an adaptive CC charge for lipos, the sensing circuitry is a bit too sensitive and trips the alarm.
I did notice about 14mV of 53kHz AC ripple (from the charger's power supply) on the output connectors. I thought maybe the sense circuit was seeing this ripple causing the alarm to trip, so I tried using an inductor and capacitor network to kill the ripple, but it still had the "output voltage too high" error. I just have to manually adjust the current for now until I figure out why it does this. Eventually, I plan on getting a better charger that will do higher cell counts at higher currents, but it is a PITA for now.
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I see. How would I get my PS to send more juice the charger if this is the case. Anyway, I love the 989 Brian. I'm not a big fan of MRC, but this thing rocks! It charges anything I throw at it. And the price dropped to 135.00 somewhere I saw, can't remember where. sjcrss knows though, you could shoot him a PM if you were interested.
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