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This is my prototype SMPS, wich is Half Bridge and it is working out of 230Vac. It was created for driving amps like LM3886 or TDA 7294 with -/+ 35Vdc at output.

Here you can see it at work, connected to 100w amp at full volume. You can see that there is no heat sinks for supply and that is because it has high efficiency, much higher than 90%. The only thing that has heat up was output diods but only at 35~40C

The power that I already got out from it was 730w with peak of 1kw, but has no problem going for a lot more.

Schematic, new one will be up soon

Next page is Prototype version 2

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Application Note on bridging audio amplifiers

A discussion on bridging audio amplifier circuits like LM3886. Includes a schematic to drive a matched pair of amplifiers in a bridged configuration, power supply considerations for LM3886 and TDA1514 power amplifier circuits-especially in bridged pairs.

Application Note on parallel-bridging LM3886 audio amplifiers

How to make it loud - real loud. (230 watts rms into 8 ohms without clipping from 4 ICs. How to match LM3886s for parallel operation, then bridge the matched parallel banks. If you are not familiar with bridging amplifiers (BTL configuration), read the Application Note on bridging listed left in article Application Note on bridging audio amplifiers.

My first car audio system My second car audio system My 3rd car audio system
Click HERE or to My Projects to see what I did for myself

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