30 Watts Audio amplifier Circuit
Description.
A 30 watt audio amplifier circuit using TDA2040 is shown here. TDA2040 is a Class AB
monolithic integrated audio amplifier available in Pentawatt package. The IC has low harmonic
distortion, low cross over distortion and has a built in circuitry for short circuit protection.
In the circuit two TDA2040 ICs are wired in BTL (Bridge Tied Load) configuration in order to
deliver 30W output into an 8 ohm speaker at +/-16V DC supply. Capacitor C1 is the input DC
decoupling capacitor. Network comprising of components R2, C4, R3 provides feedback for IC1
while R7, C6, R8 network provides feedback for IC2. Network C5, R5 and C9, R9 provides high
frequency stability. Capacitors C2, C3 filters the positive supply rail while capacitors C7, C8
filters the negative supply rail.
30 Watts Audio amplifier circuit diagram.
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