Only possible issue: can the TDA2030 operate in unity gain, and does it tolerate 100µ caps from the ouput to the rails?
My thoughts exactly, the TDA2030 is not unity gain stable and will probably oscillate.
Here's a circuit I've been wanting to try for a while now, but didn't get around to. Uses only jellybean 3-terminal voltage regulators. https://goldpt.com/virtual_ground_circuit.html
Here's a circuit I've been wanting to try for a while now, but didn't get around to. Uses only jellybean 3-terminal voltage regulators. https://goldpt.com/virtual_ground_circuit.html
I have used this circuit with great success https://www.diyaudio.com/community/...in-power-amp-applications.174791/post-2323212:
You can probably use a weaker opamp though, that chipamp can handle 7A of low frequency offset. And depending on what you want to power you might be able to use smaller caps too.
You can probably use a weaker opamp though, that chipamp can handle 7A of low frequency offset. And depending on what you want to power you might be able to use smaller caps too.
Attachments
No, I have designed something around this but not built yet. I came across it when I was looking to get a 15V negative rail from an existing positive 18V SMPS, then both rails routed to linear regulators for +/-12V. If you need to boost your psu before split to pos/neg, then similar DC/DC converters that come at SIP-4 package with isolated outputs could be used, so with two in series you could have for example 5V in, +/-15V out and then to LM78xx/LM79xx. I have used this one with great results. Generally, the scheme with DC/DC converters to get appropriate rails and then feed to linear regulators always works for me.