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-   -   Boostor, an ideal companion for a Circlophone on the move (http://www.diyaudio.com/forums/power-supplies/212945-boostor-ideal-companion-circlophone-move.html)

Elvee 19th May 2012 08:18 PM

Boostor, an ideal companion for a Circlophone on the move
 
6 Attachment(s)
For those wanting to enjoy the Circlophone (or any other conventional amplifier) elsewhere than at home, here is a simple and economical solution.

It is a simple, non-regulated charge-pump converter.

The components are cheap and universally available, yet the performances are decent (η > 90%).

The continuous output power is ~175W with adequate heatsinking, which is more than sufficient for a 2 x 80W amplifier (used for actual musical signals, obviously).

It could also serve as a base for other projects: a mobile 0->+/-20V 3A lab supply for example.

The oscillation frequency is ~22KHz, just outside the audio range.

For automotive applications, a ruggedized input filter + fusing is recommended.
At the amplifier level, additional decoupling is also recommended.

Needless to say, all the capacitors must be low esr.

The Prof 20th May 2012 02:26 AM

Hmmm.... very good... opens up new possibilities!
Thank you, sir!

heinz 20th May 2012 09:16 AM

Elvee,

nice "cut & paste construction" :-)

tiefbassuebertr 24th June 2012 11:05 AM

MF Supercharger - Comparable to the circuit topology here?
 
Basic Idea is very interesting. Unfortunately filed by "Power supplies" instead "Solid State".
what about the commercial product in this kind from Musical Fidelity?
here several URLs:

Musical Fidelity 550K Supercharger review from the experts at whathifi.com
http://thehifisite.com/musical-fidel...-supercharger/
Review | MUSICAL FIDELITY 550K SUPERCHARGERS Innovative amplifiers add plenty of power, plus so much more They fly in the face of purism, says Andrew Everard, but there's no denying the benefits they bring | Page137 - December2007 - Gramophone Arch
Recensie MF_Superchargers
Musical Fidelity Supercharger 550K: STEREO | Zeitschrift für HiFi, High End & Musik
Musical Fidelity 550K Supercharger - Spezifikationen Musical Fidelity 550K Supercharger Vorverstärker | Stassen Hifi
http://www.diyaudio.com/forums/tubes...lity-550k.html

powerflux 24th June 2012 11:40 AM

Elvee, i love the DIY-friendlyness of your ideas. They work and don't need mysterious requirements while keeping it simple.

geraldfryjr 24th June 2012 01:38 PM

Very Cool and doesn't require a huge inductor !!!

jer :)

Elvee 25th June 2012 10:14 AM

Quote:

Originally Posted by tiefbassuebertr (Post 3070590)
Basic Idea is very interesting. Unfortunately filed by "Power supplies" instead "Solid State".

It is no more than a power supply booster/adapter without great originality.
It allows you to operate a classic living-room class AB amplifier from a 12V source, and it does so cheaply, simply and reliably.
No rocket science, but useful and effective.

Quote:

Elvee, i love the DIY-friendlyness of your ideas. They work and don't need mysterious requirements while keeping it simple
:)

Quote:

Very Cool and doesn't require a huge inductor !!!
The inductor is not even required: it reduces the peak currents in in the MOSfets, and equalizes the V+ and V- voltages under load, but the circuit will work without.

geraldfryjr 25th June 2012 01:14 PM

Very interesting !

I have often wondered if such a topology might work.
I have done similar circuits using multipliers in simulations, But I have not yet built one.
I noticed the large valued capacitors in the multiplier stage and this is the key to getting a high current output as well as the higher switching frequency.

I was thinking that the inductor was used as it is in a boost converter.
As I was trying to figure out how to design a high current boost converter at one point to power some chip amps off of a car battery in a vehicle.
It was based on a circuit on page 2 of project 105 of Rod Elliot's website, But I never got any farther than the simulations.

Great Work !!!!

jer :)

Elvee 25th June 2012 02:58 PM

Quote:

Originally Posted by geraldfryjr (Post 3071715)
I noticed the large valued capacitors in the multiplier stage and this is the key to getting a high current output as well as the higher switching frequency.

Needless to say that all the big E-lytics must be low esr, otherwise they will blow up in a matter of minutes.

Headbanger 26th March 2013 08:28 PM

Hello, it's a really nice circuit. I wonder if I could use something like 555 generator to drive FETs? Also, could you please upload CD40106B.asy file so I can play with it in Spice?

Best regards, Vic.


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