LM3876 56W audio amplifier circuit | audio

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LM3876 56W audio amplifier circuit

Audio power amplifier presented in this electronic schematic circuit is based on the LM3876 audio amplifier IC which is capable of delivering 56W of continuous average power to an 8 ohms load impedance with low distortion ( 0.1% THD+N from 20Hz–20kHz) .

To build a audio power amplifier based on the LM3876 we need just few external components .

For the LM3876 audio power amplifier we need to use a 35 volts dual power supply .

Main features of the Lm3876 are 56W continuous average output power into 8 ohms , 100W instantaneous peak output power capability , Signal-to-Noise Ratio ≥ 95 dB(min) , an input mute function , output protection from a short to ground or to the supplies via internal current limiting circuitry , output over-voltage protection against transients from inductive loads , wide supply range 20V - 94V

The Rin potentiometer mounted on the input is for setting the voltage level allowed to the amplifier’s input terminals.

CM is for muting circuit and is used to create a large time constant for turn on/off muting.

Cs capacitors are used for power supply filtering and bypassing.

LM3876 56W audio amplifier circuit

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