Electronics > Beginners
Load at the output of a power supply board
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ledtester:

--- Quote from: Yac on September 04, 2019, 07:33:48 am ---If I use a programmable electronic charge for the 48V output only, how will the other outputs be charged?

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I'm not sure I understand the question.

How many outputs does each power supply board have? Does each board have 5 outputs (a 24, 48, 5, 12 and -12)? And if so, do you need to test the supply while each output is delivering its nominal power? Maybe you want to have an load attached to each output. Or if you only need to test one output at a time you can use a relay to select which output gets tested in which case you can get by with just one load (either electronic or resistive).
Yac:

--- Quote from: ledtester on September 04, 2019, 08:35:47 am ---
--- Quote from: Yac on September 04, 2019, 07:33:48 am ---If I use a programmable electronic charge for the 48V output only, how will the other outputs be charged?

--- End quote ---

I'm not sure I understand the question.

How many outputs does each power supply board have? Does each board have 5 outputs (a 24, 48, 5, 12 and -12)? And if so, do you need to test the supply while each output is delivering its nominal power? Maybe you want to have an load attached to each output. Or if you only need to test one output at a time you can use a relay to select which output gets tested in which case you can get by with just one load (either electronic or resistive).


--- End quote ---


Exactly, one board has 2 outputs and the other has 7.

The idea of using a load with a relay to select the output to be tested is interesting.
But the other outputs will not be loaded, is that a problem?
ledtester:

--- Quote from: Yac on September 04, 2019, 10:30:47 am ---Exactly, one board has 2 outputs and the other has 7.

The idea of using a load with a relay to select the output to be tested is interesting.
But the other outputs will not be loaded, is that a problem?

--- End quote ---

It all depends on the power supply and what the objective of the test is.

Some multi-output power supplies require a minimum load on one or more of the outputs in order to meet its specifications. You're just going to have to ask someone who knows the answer to that question.

If an output needs a minimum load, just connect a fixed resistor to that output which will draw that load. Then use a relay to switch in an additional load as required by the test.
Yac:
Thank you very much for the time you took to answer me,
thank you all for your help

I'm going to explore the different possibilities.
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