artur72

Can I use PC power supples for two Icharger 106B+, I would like charge LiPo battery 4s 6000mAh

This is spec of PS:

Power supply type: Silent Giant Series - Green Power Edition
ATX standard: ATX V2.3
PFC: active
+3,3V: 25A
+5V: 25A
max. combined: 120W
+12V1: 27A
+12V2: 27A
max. combined: 648W
Efficiency: up to 90,51%


This is spec for ICharger


Maximum Charge Power: 250W (at >13.5V)
Charge Current Range: 0.05-10.0A
Discharge Current Range: 0.05-7.0A
Input Voltage: 10-18V DC
Input Current: 21A
Maximum Discharge: 20W
Maximum Regenerative Discharge: 250W
Maximum External Discharge: 170W at 20V/7A
Current Drain For Balancing: <300mA
Balance Accuracy: <10mV
LiPo/LiIo/LiFe: 1-6 series
NiCd/NiMh Cell Count: 1-17 series
Pb Battery Cell Count: 1-12 series (2-24V)
Battery Setup Memories: 10

I confused with Maximum Charge Power 250W (at >13.5V), Does that mean that only the voltages above 13.5V have 250W. How many watts will have with 12V of PC PS.

EbbTide

iTrader: (39)

Well I can at least answer your first question. Yes you can use a PC power supply but to my knowledge you have to make some modifications. Here is a pretty good video explaining it and what the end result should be

https://youtu.be/6HHb0pvaTMw

biz77

iTrader: (47)

If I were you I would consider a used server power supply, like the very popular HP DPS1200FB, which is much easier to modify for RC use (doesn't even require you open the case) and it will be more than enough power to run your two iChargers. They typically sell for about $30 shipped here in the US.

If you already own the power supply you listed above, then yes it is enough power to run your two iCharger 106B's.

4s battery = 4.2 volts/cell * 4 cells = 16.8 volts at full charge.
Maximum charge capability = 10 amps (or 250 watts)
16.8 volts * 10 amps = 168 watts
Factor in an additional .15 for wiring and charger inefficiencies: 168 * 1.15 = 193.2 watts.
193.2 watts / 12 volts = 16.1 amps
So each charger would require ~16.1 amps at it's peak current draw. You say the power supply you have in mind has two separate 12 volts taps capable of 27 amps each, so you are good to go.

artur72

Do yuo mean on firs part of video or the second part (advanced)?


In my country I can hardly find this PS, what you mean about this PS
Mean Well RSP-320-15

http://www.meanwell.com/webapp/produ...x?prod=RSP-320

biz77

iTrader: (47)

I feel that the Mean Well power supplies are very nice, but overpriced. The 320-15 will not be enough power to run your two 106B's to full power (10 amps) on 4s batteries. If you are planning at charging your 6,000 mah batteries only at 1c charge rate and don't plan on going to larger (higher capacity or more cells) batteries then this power supply could work okay.

4.2 volts * 4 cells = 16.8 volts
1c charge rate = 6 amps
16.8 volts * 6 amps = 100.8 watts
Factor in 15% for charger and wiring inefficiencies: 100.8 * 1.15 = 115.92 watts.
Double it for two chargers = 231.84 watts.
The Mean Well is rated for 320 watts, so you are okay in this scenario.


Ultimately I would try to size your power supply to be able to run your charger setup to it's full power output with room to spare. In your case, you have two 250 watt chargers or 500 watts total. Again you would want to provide some cushion for charger and wiring inefficiencies, so I would multiply that by 1.15: 500 * 1.15 = 575 watts. I would probably buy nothing smaller than a 600 watt power supply, preferably with 14 volt or higher output so you can get the full output from your chargers.