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dual power supply
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paex30:
Hi everyone,

I wanted to design a simple dual power supply +-15V from a 24 V. Few months ago I found a video on EEVblog youtube channel where a dual power supply was designed simply using OPAMPs. Is there anyone who could remember what video it is or could have some suggestions to design the power supply?

Thanks
+Mikie:
What you're asking should be easy to find on the net. But I would simply go for an IC voltage regulator, 7815/7915 for example if you only need fixed voltages. No need for mucking around with op amps. For adjustable there's that LM-something adjustable regulator name which I can't remember at the moment.

For schematics you can have a look at the manufacturers sites, look for "Application notes", but there should be basic schematics in the IC datasheets.
paex30:
For this kind of IC you need generate a negative voltage but I have only positive 24 V and I want my design to have a low cost, so I think to use a flybuck converter with transformer or only OPAMPs.
Zero999:

--- Quote from: paex30 on July 19, 2018, 08:02:35 am ---Hi everyone,

I wanted to design a simple dual power supply +-15V from a 24 V. Few months ago I found a video on EEVblog youtube channel where a dual power supply was designed simply using OPAMPs. Is there anyone who could remember what video it is or could have some suggestions to design the power supply?

Thanks

--- End quote ---

What is it powering?

It's possible the circuit can be modified to work with a single supply rail.

How much current is needed?

Can't you use a rail splitter to get +/-12V?
paex30:
I need a +-15V with a maximum current of 170 mA per channel.
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