Nov 022020
 

6 watts Audio Amplifier Circuit with TDA2613

To make a 6 watts audio amplifier circuit, we use the TDA2613 integrated circuit. This IC is a hi-fi amplifier encapsulated in a 9-pin in-line IC. The TDA2613 can use a dual polarity voltage source, but in our case we used single polarity.

How does the 6 watts amplifier circuit work?

Capacitor C1 is used as a coupling capacitor, passing only the audio signals (time-varying signals) to the amplifier. Capacitors C3 and C6 function as filters for the voltage source that powers this circuit.

The audio signal enters the amplifier’s non-inverting input (pin 9) through capacitor C1. The inverting input (pin 8) and pin 3 of the integrated circuit are linked and connected to ground through the electrolytic capacitor C2.

6 Watts Audio Amplifier with TDA2613 (Hi-Fi)
6 Watts Audio Amplifier circuit with TDA2613 (Hi-Fi)

The amplified audio output is applied to an 8 ohm speaker through an electrolytic capacitor C5. To improve the stability of the circuit at high frequencies, a resistor and capacitor connected in series is included (C4 and R1).

TDA2613 - 6 W hi-fi audio power amplifier IC

This audio amplifier IC has the ability to avoid the clicking noise that is heard many times in the speakers when turning the voltage source on and off.

Important notes:

  • The TDA2613 integrated circuit is short circuit proof and thermally protected.
  • The audio amplifier can be powered with voltages ranging from 15 to 42 V, but 24 V is recommended.
  • The integrated circuit must use a heat sink

Circuit component list

  • 1  TDA2613 integrated circuit (U1)
  • 1  8.2 ohm resistor (R1)
  • 1  220 uF (microfarads) capacitor (C1)
  • 1  100 uF, 50 volts electrolytic capacitor (C2)
  • 1  100 nF (nanofarad) capacitor (C3)
  • 1  22 nF capacitor (C4)
  • 2  680 uF, 50 volts electrolytic capacitors (C5, C6)
  • 1  heat sink for the TDA2613 integrated circuit
  • 1  8 ohm speaker (SP)
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