50W chip amp simplest design needed

[danielwritesbac]

Anyone can suggest a 50W or greater stereo amplifier based on a single chip? Simplicity is my goal. . .

Assuming that you wanted a real 50W per channel actually usable linear audio, you'd either get into something very complicated or have two boards.

The easiest way for that much power is to use a Pair of AudioSector Parallel LM4780 boards, because they're linear to 80W and are extremely simple.

A Parallel LM4780 contains two of LM3886 cores with a rating of 40 watts apiece, but Audiosector has run both channels of the LM4780 parallel, to make a powerful 80W mono chip amp. So, it does take two amplifier boards for stereo.

Notably, there's enough thermal interface area there to actually support the requested amount of power (for real), AND the power circuit has been oversimplified for an easy build.

One LM4780 = 40 watts per channel. Two LM4780's run parallel = 80 watts per channel.

DIY Chip Amplifier Kits, PCB's, Components and Information.

 

[AudioLapDance]

National's 3886 datasheet shows a single supply implementation. The nice thing about that schematic is that it shows the "optional" components that have been omitted from the dual supply schematic. ...