Miniature Power 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.

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 purpose of this project 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.

• TDA7052A - Package : SOP8, Quantity : 1
• SOIC-8 / MSOP-8 / TSSOP-8 to DIP-8, SMT Breakout PCB - Quantity : 1
• 220μF / 10V Electrolytic Capacitor - Quantity : 1
• 0.22μF / 25V Ceramic Capacitor - Quantity : 1
• 8Ω 2W (or higher rated) speaker - Quantity : 1

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).

The J1 connector is attached to the +5V power line of the USB data cable (pin-1 and pin-4).

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. The dimension of the finished module is 17.6mm × 18.8mm × 12.5mm only.