TDA7052A - DIY miniature amplifier

TDA7052A is an audio power amplifier designed for use in low voltage battery-powered equipment. Compare with the popular LM386, TDA7052A is not so popular among DIY electronic enthusiasts.

Final view of the finished amplifier with speaker.

Using the Bridge Tied Load principal, this IC delivers an output power of 1.2W into an 8Ω load with, 6V power supply.

The most striking feature of this amplifier is the minimum external component count. This IC only needs two external capacitors to build a functional audio amplifier.

The gain of the amplifier is fixed internally at 40dB. The amplifier got, short-circuit protection, requires no external heatsinks, and not producing any switch on/off click sound(s).

Although this is an old amplifier IC, it is still available to purchase in many local and online stores. Compare with the other low-power AF power amplifier ICs, TDA7052 is a little expensive in the local market. Although it is costly, I use this IC in many designs because of its simple circuit configuration and functionality.

The purpose of this post is to demonstrate the simplicity of the TDA7052A IC. In this effort, I have built a complete amplifier on SOIC-8, MSOP-8 to DIP breakout PCB. These breakout PCBs are widely available to purchase at local stores and online stores for a small cost. Thanks to the low component count, I manage to build this on SOIC-8 to DIP breakout PCB and couple with the speaker as an add-on.

Schematic of the TDA7052A amplifier.

The dimension of the finished module is 17.6mm × 18.8mm × 12.5mm only. Compared to other miniature amplifier circuits (such as LM386, PAM8302, TBA820, LTK5128, LM831, etc.), this amplifier can usually build using standard through-hole type electronic components.

The complete construction process of this module is in the video on my YouTube channel.

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