Simple 4x50W power amplifier

This simplest audio frequency amplifier is capable of delivering 50 watts of power to each of the four channels. In total, it turns out 200 watts of sound power. And this, as it turned out, is not the limit. The microcircuit on which the amplifier is built can also give 80 watts per channel for a 2-ohm load.

Nowadays, building a powerful amplifier with your own hands is not difficult. And all this thanks to the modern elemental base.

Today we will talk about a simple amplifier on the TDA7560 chip, which can easily be done by a person who is practically not versed in electronics.

It costs TDA7560 Ali Express absolutely ridiculous money, about $ 1 - see here .

Philips TDA7560 is just a godsend, especially for those who have not encountered it before. She was chosen for a long time by both beginner radio enthusiasts and car enthusiasts, for her low voltage. The TDA7560 chip has a complete, but older analogue - TDA7388, a little less powerful.

Amplifier specifications

Output power:

  • At a load of 4 ohms, the maximum is 4 x 50 watts.

  • At a load of 4 ohms, the nominal is 4 x 45 watts.

  • At a load of 2 ohms, the maximum is 4 x 80 watts.

  • At a load of 2 ohms, the nominal is 4 x 75 watts.

  • Supply voltage is from 8 to 18 Volts.

See other datasheets for datasheets.

Amplifier circuit

You can always see the circuit diagram of the microcircuit in the datasheet. Everything is simple and obvious: there are four entrances to the left, four exits to the speakers to the right. Naturally, the input can be shorted, but not the output. Each output of the microcircuit must be loaded on its own speaker system.

With this, I think, questions will not arise. The only thing worth explaining is the output of ST-BY and MUTE. "ST-BY" is the standby mode, the usual one is immediately connected to the power plus and the amplifier is always active. "MUTE." - This is the mute mode, the usual one is also connected to the power plus and the amplifier always becomes active. There are jumpers on the board for that.

Amplifier board

Fees can be made an ordinary LUT for several tens of mines. You can download it here: [7.32 Kb] (downloads: 2522)

After soldering and assembling the amplifier, do not forget to install the chip on the radiator, preferably large if you are a music lover who likes volume.

Amplifier application

The chip was originally developed for use as an amplifier for sound power in car radios. Therefore, using this amplifier in a car is an excellent choice. But note that it is advisable to use thick power wires. It may also be necessary to significantly increase the capacity of the filtering power capacitors.

The amplifier on the chip is great for home use. You can feed it from the old computer power supply, as I did in my time. And use a cooling radiator with a fan - this will significantly reduce its size.

I think there’s nothing complicated here, but if someone doesn’t understand something, I’m waiting for your questions in the comments. Thanks to all!

Watch the amplifier test video