320W Power Audio Amplifier, Powered with 14.4V - 2Ω using TDA7560 IC + PCB

Fig. 1 - 320W Power Audio Amplifier - IC TDA7560

For Portuguese version, click here!

This is a simple high power amplifier circuit, with 320W divided into 4 outputs with 2Ω. This amplifier is capable of providing 50 Watts of power per channel, totaling 200W of sound power. 

But, what title does it say is 320W? That's right, the amplifier circuit with TDA7560 for which it is the base of this amplifier, was designed to provide a maximum power of 80 Watts per channel with a load of 2Ω powered by 14.4V.

Which opens up great possibilities for those who do not usually use symmetrical power supply, and you can also use this circuit as an amplifier in your car.

Since the connected car provides approximately 14.4V that serves to charge the battery, and without taking into account that this circuit may also be being powered directly by 12V, which would be when the car is off.

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The TDA7560 inputs are compatible with Terra (GND) and can support very high input signals (± 8Vpp) without any performance degradation.

Output Power Settings:

For 4Ω load

VS = 13.2V - THD 10% - 4 x 25 Watts
VS = 13.2V - THD 1% - 4 x 19 Watts
VS = 14.4V - THD 10% - 4 x 30 Watts
VS = 14.4V - THD 1% - 4 x 23 Watts

For 2Ω load

VS = 13.2V - THD 10% - 4 x 45 Watts
VS = 13.2V - THD 1% - 4 x 34 Watts
VS = 14.4V - THD 10% - 4 x 55 Watts
VS = 14.4V - THD 1% - 4 x 43 Watts

Maximum Power THD> 10%

VS = 14.4V - 4Ω - 4 x 50 Watts
VS = 14.4V - 2Ω - 4 x 80 Watts

Characteristics

• Hi-Fi Distortion Class
• Low output noise
• St-by function
• Mute function
• Auto Mute in min. Supply voltage detection
• Supply voltage range from 8 to 18Volts
• Low external component account:
• Internally fixed gain (26db)
• No external compensation
• Without Bootstrap Enablers
• 0.35A onboard pre-driver

Standby and Mute

The Standby and Mute installations are both compatible with CMOS, if you do not want to use a direct connection with the respective Vs pins.

You can use standard low power transistors to drive the Mute and Stand-By pins if you do not want to use the ports CMOS or even use microprocessors.

The R-C set should always be used to smooth the transitions to avoid audible transient noise. In Stand-By mode, the time constant to be assigned to achieve a transition practically free of pop-ups must be slower than 2.5V / ms.

In Figure 2 below, we have the schematic diagram of the Audio Amplifier with 320W Power, powered with 14.4V with IC TDA7560, as we can see, it is a very simple circuit, compared to its insight, so small.

However, quite powerful, and this is great because it makes assembly a lot easier for those who do not have great experiences with electronics and also wants to participate in this excellent and incredible world of electronics.

Fig. 2 - Audio Amplifier with 320W - Powered with 14.4V with CI TDA7560

The power supply must provide a current of at least 7 Amperes. It is important to remember that the maximum supply voltage allowed by this IC is 18 Volts, if we exceed this supply voltage we can burn the Integrated Circuit.

Components List

• CI 1 ................................ TDA7560 Integrated Circuit
• R1 .................................. 10KΩ Resistor (brown, black, orange, gold)
• R2 .................................. 47 KΩ Resistor (yellow, violet, orange, gold)
• C1, C2 ........................... 1μF Ceramic capacitor / polyester
• C3, C4, C5, C6, C9 ....... 0.1μF Ceramic / polyester capacitor 
• C7 .................................. 470nF Ceramic / polyester capacitor 
• C8 .................................. 47μF - 25V Electrolytic capacitor 
• C10 ................................ 2.200μF - 25VElectrolytic capacitor 
• CN 1, 2, 4, 5, 6, 7, 8 ...... 2-Pin PCB Terminal Blocks - EK500V-XXP
• CN 3 .............................. 5-Pin Card-to-Cable Connector
• Others ............................ Printed Circuit Board, tin, wire, etc.

The PCB - Printed Circuit Board, has its dimensions of; 83.439mm width by 58.166mm depth, and, We are making available for Download the necessary materials for those who want to assemble with PCB, the files in PNG, PDF and GERBER files for those who want to send for printing.

Download:

Direct Link: PNG, PDF, GERBER files

This post is an authorized copy of our partner www.fvml.com.br. For those who want to follow step by step the assembly of this amplifier and the sound tests, you can access the video in Portuguese on the FVML Youtube channel by accessing below.

If you have any questions, suggestions or corrections, please leave them in the comments, and we will answer them soon.

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My Best Regards!!!