However, now that I remember: we tried 3x xlg240-h in one circuit and no light whatsoever. 2 of the worked though.
in certain configurations it my work but its tricky.
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Setting Voltage and Current. Program the current limit of each power supply to its maximum value. Next, set the output voltage of the CV supply to a value slightly lower than the CC unit(s). The CC units supply the maximum output current that they have been set to and drop their output voltage until it matches the voltage of the CV unit, which supplies only enough current to fulfill the total load demand. The current supplied to the load will be the sum of the current from each supply. To learn more about constant current and voltage modes see:
How do I put the power supply in the constant current mode?
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maybe with a AB driver type if your boards voltage is below 48v (with a CC/CV 48V meanwell AB)
and you limit one driver by Vo and one by Io, but very unsure about it, not recommended.
www.keysight.com
"Connecting switching power supplies in parallel
We’ve established that it’s quite possible and feasible to connect two power supplies in series, with three very important rules to observe, which is really in line with what we learned about connecting batteries in series when we were at school. In those science class lessons, we learned that we can connect batteries in parallel as well. Is this possible with power supplies? The answer is “yes and no” …
Connecting switching power supplies in parallel could cause both power supplies to fail
As a broad guideline rule, you cannot and should not connect two switching power supplies in parallel. There is an exception to this which we’ll get to shortly, but the main reason why most switching power supplies should never be connected in parallel, even if they claim to be same voltage, same make, same current : one power supply will generally bear more load than the other and this will cause that power supply to fail, and then the second power supply will fail due to being overloaded. This is where the exception comes in: some power supplies, but very few, have been designed to support being connected together in parallel. These power supplies have a current sharing function, some of the ranges of Mean Well power supplies which can be safely connected in parallel include: SDR, TDR, PSP, RSP & RST. These power supplies will have a P (LP/CS) terminal which you should connect between the power supplies. Even with these power supplies connected correctly, there are still “issues” such as if the load falls below 10% of the rated load of any one of the power supplies in which case the power supplies start to “play up”.
Even when power supplies are designed to support parallel connection, it’s not perfect and there are issues.
Rule 4 : Do not connect switching power supplies in parallel
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All you need to know about whether you can connect power supplies in parallel or series, and if so, when this can be done and how. Getting this wrong can have dire consequences for your power supplies!
www.lumul.co.za
