RetroBoy Advance – Sound On!

Time for sound… so where to start? As usual, (too bad they don’t have an affiliate program!).

So, what are we looking for? A linear audio amplifier. The goal isn’t necessarily to get the cheapest, but rather to get the one that is going to fit the needs of the device. Namely:

  • mono speaker output
  • stereo headphone output

Looking through the options, LM4853MM/NOPB really sticks out to me as the big winner. Why? Great question!

From the data sheet:

The LM4853 can automatically switch between mono BTL and stereo SE modes utilizing a headphone sense pin. It is ideal for any system that provides both a monaural speaker output and a stereo line or headphone output.

This is exactly what I want! Also, this package has the friendly pins to make soldering easier.

Here is the “typical circuit” the data sheet provides too:

Screen Shot 2017-01-04 at 4.07.48 PM.png

Just look at the connections on the outside, the rest is the internal circuitry. Of course, some of the resistor and capacitor values might need to be tweaked, but it’s a great starting reference.

The thing that is missing from this is the volume control. For that, I’m going to need to do a bit more research. Until next time!

RetroBoy Advance – Sound On!