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BrianG · 12.06.2006, 05:19 PM

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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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	12.06.2006, 05:19 PM 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.