toothache

TDA2030 audio amplifier

Overview

A homemade small speaker is made using the TDA2030 audio amplifier chip. This project uses a BTL bridge push-pull circuit to increase the output power.

1. The power supply of this circuit can be selected from single power supply or dual power supply .

1. 1. When the shorting cap is shorted to pins 1 and 2 of the header , the dual power supply is provided.
  2. When the shorting cap is shorted to pins 2 and 3 of the header , a single power supply is provided.

Note: When powered by a single power supply, the input power GND is connected to -Vcc at the input end of the board, otherwise the device will not work properly.

2. The maximum input voltage of dual power supply is ±22, and the maximum input voltage of single power supply is 44V. Recommended dual power supply voltage ±15V, single power supply 30V.

3. The louder the volume, the more serious the heat of the chip will be. It is necessary to add a heat sink to the chip. If possible, the heat sink and fan can be enlarged.

4. Adjust the potentiometer R10 to adjust the volume. At the same time, the ratio of feedback resistors R4 and R5, R11 and R12 can also be changed to increase the chip voltage amplification factor. Uout=（1+R5/R7）*UIN

Top level of the board:

Bottom layer of the board:

The demo video may be too noisy, but the actual effect is really good.

Design Files

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Update:2025-05-22 18:43:37

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