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5W BTL Audio Amplifier with DC volume control + PCB

Fig. 1 - 5W BTL Audio Amplifier PCB


This audio amplifier circuit is based on the TDA7056B, that's a mono Bridge-Tied Load (BTL) output amplifier with DC volume control. It is designed for use in, PC audio amplifiers, TVs, and monitors, but is also suitable for battery-fed portable recorders and radios. The device is contained in a 9-pin medium power package.

A Missing Current Limiter (MCL) is built-in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 100 mA (300 mA Typ.). This level of 100 mA allows for headphone applications (single-ended).

This TDA7056 audio amplifier will provide a maximum output power of 5 watts into an 8 ohms load using a 6 volts power supply, or maximum output power of 3 watts into a 16 ohms load using an 11 volts power supply.

Fig. 2 - Schematic TDA7056 Audio Amplifier

The audio gain of the  IC is internally fixed at 40 dB. The maximum input voltage supported by this circuit is 18 volts. As we can see in the Figure 2  circuit diagram, we will need only a few components to build this audio amplifier.

VOLUME CONTROL

In conventional DC volume circuits, the control or input stage is coupled to the output stage via external capacitors to keep the compensation voltage low. In the TDA7056B, the DC volume control stage is integrated with the input stage, so coupling capacitors are not required. With this configuration, a low compensating voltage is still maintained and the minimum supply voltage remains low.

FEATURES

  • DC volume control
  • Few external components
  • Mute mode
  • Thermal protection
  • Short-circuit proof
  • No switch-on and switch-off clicks
  • Good overall stability
  • Low power consumption
  • Low HF radiation
  • ESD protected on all pins.

Material list

  • U1........................... TDA7056 – Audio Amplifier Integrated circuit
  • C1 .......................... 1uF - 25V – Electrolytic capacitor
  • C2 .......................... 0.47uF – Polyester Capacitor
  • C3 .......................... 100uF - 25V – Electrolytic capacitor
  • R1 .......................... 100K ohms - 1/8 W – "brown, black, yellow, gold"
  • R2 .......................... 1K ohms - 1/8 W – "brown, black, red, gold"
  • RP1 ........................ 22 k ohms –  Potentiometer
  • P1, P2, P3 ............... Kre Block Terminal Terminal 2-Way Double Connector
  • Miscellaneous ........ Printed Circuit Board, tin, wire, etc.

We are offering to download the link with the printed circuit board printing files, they are; Gerber, PDF layout, PNG, all the files with a direct link to Mega.

Direct link to download

Click in the link  to download the Files: PCB Layout, PDF, GERBER

Any questions, suggestions, corrections, please leave them in the comments below, which we will soon be answering.

My best Regards to You!!!

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