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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 10-05-2017, 08:29 PM   #1
garyp1029
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Default ICharger 206B

I have a Mean Well SP-320-15 power supply which came with an ICharger 106B a few years ago. Is that power supply adequate to use on an ICharger 206B? Thanks. Gary
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Old 10-07-2017, 04:34 AM   #2
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Well the answer is Yes and No.

Sounds strange but that is how the numbers work out. You have a 15 volts @ 20 amp capacity, orr 300 watts. The 206b requires a minimum 300 watt power supply, but there is a catch. That 300 watt input is at 18 to 24 volts. You are running 15 volts so, you will not get full capacity. So it is usable, but you will not be able to run at its full capacity. Not sure what the capacity will be, but as an engineer and an educated guess based on 16.667 amps input maximum @ 15 volts = 250 watts.

Having said that if you decide to get a new Power Supply, do yourself a huge favor, get a 24 volt power suppl as large as possible (amps). At 24 volts with your charger at max power ris 12 amp input, so nothing smaller than 24 volts @ 15 amps. The more amps the better. Example to run a PL8 charger would require 50 amps input. So if you end up buying a new power supply, plan for the future and buy more than you need. That will allow you to upgrade the charger down the road. Otherwise you get the situation you find yourself in now.

It will still work as long as the charger does not demand more than the power supply can provide. I am comfortable with saying your limit is right around 250 watts. That may not mean much to you, but 250 watts of charger power is quite a bit. Examples on a:

1. On 3S is 22 amps
2. On 4S is 17 amps
3. On 5S is 13.5 amps

So as you can see 250 watt limit is no big deal and likely more than you need so it would never be missed. So I think you are good to go, and just need to know the limits. To find the charge current limit with a 250 watt source is super simple 5th grade math. Current = Power / Battery Nominal Voltage.

Try it for 3S. 250 watts / 11.1 volts = 22 amps. Got any 3S batteries that can withstand 22 amps of charge current?
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Old 10-07-2017, 02:56 PM   #3
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In addition to what dereckbc said, the specific job will determine the requirement. Use the same power formula to apply to the charge job. An example might be charging a tiny rx battery using 2 amps x 8 volts = 16 watts of power. (even a small 25 watt ps will do that)

I hope you get what I mean. PS use your biggest job to find your max. Just because a charger's max power is 500 watts doesn't mean that you will ever require that.
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Old 10-10-2017, 01:43 AM   #4
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I have absolutely no intention of ever using a battery larger than 4 cell. I am 81, have 10 planes, 9 of which are 3 cell. Only my Dynam Tiger Moth uses a 4 cell. So it sound like my 320W, 15V PS should do just fine. I have read a lot of positive comments on the HK 300W, 25A Reaktor charger. Most agree that it is a copy of the ICharger 206b at about half the price. What's your opinion? Thanks. Gary
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Old 10-10-2017, 03:22 AM   #5
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Originally Posted by garyp1029 View Post
I have absolutely no intention of ever using a battery larger than 4 cell. have 10 planes, 9 of which are 3 cell. So it sound like my 320W, 15V PS should do just fine.
Yes Sir, no worries Gary. You have more than enough power supply. I cannot see any need for you to charge at 22 amps on 3S or 17 amps on 4S unless you are doing parallel charging. You basically have 200 to 400 % more power than you need. It is overkill for what you have now.

Originally Posted by garyp1029 View Post
I have read a lot of positive comments on the HK 300W, 25A Reaktor charger. Most agree that it is a copy of the ICharger 206b at about half the price. What's your opinion?
Yes it is a copy and has the exact same requirement of needing a 24 to 30 volt power supply to take full advantage of its power capacity. Lower voltage means less power available.

Power or Watts is a product of Voltage x Current, or Watts = Voltage x Current. The Charger can operate from 12 to 30 volts as a variable of Voltage. Current Input is limited to a maximum regardless of Voltage. That limit is roughly 13.5 Amps, so if Current = 13.5 Amps is a fixed variable. With a 24 volt x 13.5 amps current input is 320 watts roughly. At 12 volts x 13.5 amps = 160 watts. So as you can see, the lower the input voltage means less power.
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