CLASS AB AUDIO AMPLIFIER

551

15:59:46

this circuit really works with nice sound quality. But the transistor gets hot even with no audio input and get hotter when in operation. Heatsink is recommended i use TIP41(npn) and TIP42 (pnp) as the two power transistors and 2n3094 for the first npn transistor. 1n4148 is recommended in because its a fast silicon diode for higher frequency. This is just a very simple amplifier and its very inefficient.

published 8 years ago

houssem199

8 years ago

2.22Mf as a capacitor ? 😲

LeButch

8 years ago

Milli, not mega Farad. The is a small difference...

zorgrian

8 years ago

Its wasteful compared to class D or other topologies. However, I really love the sound of the push pull current amplifier. Cant be beaten!

zorgrian

8 years ago

I do feel its time to lower the whacking great cap you have on the output. Its just OTT

zorgrian

8 years ago

@H199, the output transistors should not get hot with no signal, as there is only a small quiescent current going through the transistors.

bsecekid

8 years ago

I really made this project and supplied it with 19 VDC from notebook charger , it made it louder and efficiently dissipating a lot of heat

fu53b0x

8 years ago

HI, how do you get/calculate component data ie Saturation current. I have looked at loads of datasheets and this information is hard to find, cheers

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.