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36Vd.c. @ 8.3A Power Supply + Buck Converter Answered

Hello Friends,

I have a 36Vd.c. @ 8.3A Power Supply that I would like to convert into a Variable Bench Power Supply. After researching the topic, I have decided on choosing a Buck Converter as opposed to a Linear Regulator. 

Shopping around online, I stumbled upon the LM2596 Converter:


http://www.ebay.com/itm/DROK-LM2596-DC-Buck-Converter-4-0-40V-to-1-25-37V-5-12V-24V-2A-DC-Voltage-Reg-/301381167269?pt=LH_DefaultDomain_0&hash=item462bb7a8a5

Any thoughts and or suggestions?


Beyond that, I do have a general question...

I've read on a few power supply instructables that it's recommended that all rails be used (for example all yellow/12v cables) to insure a more steady current. Now being that the max output of the above mentioned power supply is 8.3A and (please correct me if I'm wrong) according to the supplied spec sheets, power is coming from 3 rails, would it be safe to assume it not necessary to feed all rails into a buck converter since its output is only 2A?

Please put me in my place...




Comments

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davidkiyan
davidkiyan

5 years ago

Thats odd... I could of swore my uploads were sucessful. Anyways, here they are...

Makes sense what you said about the supply wasting more energy than the output. I guess I was too focused on the adjustable output of the voltage and didn't even consider thinking adjustable current as well.

1.gif2.gifIMG_07101.jpg
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davidkiyan
davidkiyan

Reply 5 years ago

Those are the only specs I could get from the manufacturer. I was told it was a legacy product so he had to search in the archives and that was all he could dig up.

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Downunder35m
Downunder35m

Reply 5 years ago

Double check if the converter can handle the input voltage.
Most are only rated for up to 24V.

But with a supply that powerful you might want to consider adding a few more (fixed) voltages as well, like 12V and 5V - for chargers and so on.

In any case the power supply won't mind the 2A you try to get off it, no need to combine rails or anything.

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Downunder35m
Downunder35m

5 years ago

What power supply?

What output do you require?
12V, 5V a mix of voltages?
Adjustable output maybe?

We do our best to help here, but at times we still struggle a bit with the clairvoyant part for answering questions.....

For a 2A step down converter I would not use such a big power supply.
The supply is wasting more enegry than the output will use.