In this we learn how to build a simplest stereo amplifier circuit using a couple LM380 ICs.
LM380 is an audio amplifier employed specifically for power audio amplification requirements.
It provides a constant internal gain. A particular input signal permits ground reference signal and the out signal keeps its level to the half of the used input voltage.
Three ground pins on both sides of the IC generate its use simpler for anybody to make use of it. A wide range of supply voltage, large peak current, large input impedance, minimal distortion tend to be its important functions. LM-380 works extremely well in intercoms, servo motors drivers, alarms, TV sound systems etc.
A very simple LM 380 IC based application circuit is demonstrated in the figure below.
If you are interested to know about the output specifications of the proposed stereo amplifier design, the following data might be helpful.
- Input Sensitivity: 200 mV
- Input Impedance: 150 k
- Output power: 2.5W RMS/channel
- Distortion: 0.2%
- Bandwidth: 100kHz (tone control flat)
- Loudspeaker impedance: 8 ohm or 15 ohm