Hello, ive got a nice little amp that needs a ~500w dual rail supply ( has a -60v output, a 0v “virtual ground” output, and a +60v output)
Does anyone know of a relatively simple circuit to take my 12v and split it to a 60v, 0v, 60v output? preferably with soft startup and control feedback? have a milling machine, so can etch pcbs pretty well.
I have seen a few designs that use the tl494 that look good, however im not very confident with transformers so it really handy if you recommend a transformer with said schematic (or, i dont mind winding one)
[solved]
Does anyone know of a relatively simple circuit to take my 12v and split it to a 60v, 0v, 60v output? preferably with soft startup and control feedback? have a milling machine, so can etch pcbs pretty well.
I have seen a few designs that use the tl494 that look good, however im not very confident with transformers so it really handy if you recommend a transformer with said schematic (or, i dont mind winding one)
[solved]
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I would encourage you to build a simple, conventional 500W supply.
Or is this for use in a vehicle?
Or is this for use in a vehicle?
No, it is a step up circuit, the input is 12v, which would likely oscillate through a transformer with a primary and dual secondary, outputting 60v, 0v, and -60v. The title lacks info.
Yes, it will be used in a car to make use of a 12v battery, and supply a dual rail amp that needs 55v, 0v and -55v
Yes, it will be used in a car to make use of a 12v battery, and supply a dual rail amp that needs 55v, 0v and -55v
It is clearly a car amp power supply, what else?
🙂
as of specs:
Neither:
🙂
as of specs:
those words do not go together in the same phrase 😉
Neither:
besides the 500W requirement that is 😎
No. Chinese 500 Watt are in reality only about 50 Watt continuous .
500 is only at 0,1 ohm load for 0,01 second measured at top-peak signal
have fun
500 is only at 0,1 ohm load for 0,01 second measured at top-peak signal
have fun
Only if they are 500 W PMPO. If they are 500 W(RMS) they will deliver. Actual PMPO does not exist in the real world. It is a theoretical construct.
The easiest 12V setup for someone without much experience would be a 12V 1kVA sinewave inverter powering a transformer with 60V secondaries...
most UPS systems are not sinewave and are usually not engineered for 100% duty, That is why I recommended the victron inverter, these are made to last.
Thanks for the help everyone, i gave up on 12v to dual rail thing, as everyone said it is a little complicated for me at the moment. Found a bargain toroid transformer that can handle 600w and has dual secondaries, so ended up just milling a rectifier and wiring up to the transformer, then printed a amp case. I have a great home subwoofer amp now though which is nice 🙂
Hello, I have the same issue for powering up a small 4 channel amp that I develop, I am just letting you that also didn't receive any good recomendations and at the moment I am already decided to design and build an SMPS from 12 to split rails, although it will be for plus and minus
30 volts.
Link to my tread..
https://www.diyaudio.com/community/threads/4-channel-diy-amp.406429/#post-7683431
30 volts.
Link to my tread..
https://www.diyaudio.com/community/threads/4-channel-diy-amp.406429/#post-7683431
I have managed to make the 12v to 60-0-60, converter, milled it out and have some pretty good results:
The reason it was not working before was simply bad breadboard connections, the circuit works well now milled out of fr4 pcb board, however my tranformer is not wound very well so im only hitting +/-41v at the moment. Happy to drop the gerber files if anyone is interested
Exact circuit diagram that i am using:
The reason it was not working before was simply bad breadboard connections, the circuit works well now milled out of fr4 pcb board, however my tranformer is not wound very well so im only hitting +/-41v at the moment. Happy to drop the gerber files if anyone is interested
Exact circuit diagram that i am using:
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here is the board and schematic file:
Also, if your planning on making it i don't really recommend it as it still has issues:
Also, if your planning on making it i don't really recommend it as it still has issues:
- no feedback (i would love if someone could let me know how to implement this)
- because there is no feedback and because the transformer is hand wound, you can get strange output voltages with one side lower, e.g 45v-0v-55v
- for some reason, is drawing 5 amps at 8v with no load on secondary of transformer (this doesn't seem right, if any can see an issue causing this 🙂)
- pcb traces that lead to mosfets source or drain need soldering otherwise they will burn out.