This is a TDA2030 Bridge amplifier circuit diagram with PCB. You may have used this IC number.
If we use only one. It will have an output power of about 14 watts.
With the circuit, we use two ICs mixed in the bridge BCL amplifier mode.
It gives an output power of 35 watts to 40 watts at 8 ohms speaker. This requires a +/- 15V Dual Power supply at the current least of 2A.
Its advantage is small, easy to crease, cheap, and without any modifications. Because we use two TDA2030.
Note: You can read more TDA2030 with a datasheet.
How it works
Normally, TDA2030 is an integrated circuit that uses as a low-frequency class AB amplifier.
Typically it provides 14W output power at ± 14V.
However, you can get more 35W output on TDA2030 in a bridged connection with a +- 15V power supply.
In the circuit above, there are two TDA2030 that are connected together. Both the output terminals—Pin 4 connect to the speaker.
You can learn the bridge amplifier works here.
Then, see the input. The capacitor-C1 pass signal to pin 1 of IC1. It increases the signal up to out of pin 4.
By helping of R2, R3, and C2 to control the gain of IC1.
Next, some signals feedback to inverting input pin 2 of IC2 through R9.
Also, R7, R6, and C5 control the gain of IC2.
It causes the output of the circuit has high power more than 3 times normal.
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Parts you will need
IC1, IC2: TDA2030 output 14W at 4Ω and 9W at 8Ω
0.5W Resistors 5%
R1, R2, R7, R8, R9: 22K
R3, R6: 680Ω
R4, R5: 1Ω
C1: 2.2μF 50V
C2, C5: 22μF 25V
C6, C7: 100μF 25V
Ceramic or Mylar Capacitor
C3,C4: 0.22μF 50V (224 code)
C8, C9: 0.1μF 50V (104 code)
Power Supply parts list
T1: 15V CT 2A transformer
C10,C11: 2,200uF 35V Electrolytic Capacitor
D1-D4: 1N5402, 3A 100V Diodes
F1: 0.5A Fuse
S1: On-Off Switch
TDA2030 Bridge Amp Power Supply
This circuit requires Dual power supply circuit, 15V to 22V DC. You may use this circuit below.
It is a normal unregulated power supply circuit. You should use the least 2A transformer. It makes output full to 35 watts. Other details see in the circuit.
How to build
First of all, you need to take all the components on the list above. Then, you may build a PCB layout as below.
If you want faster then you may use Universal PCB. Which they do not too hard.
When you buy all electronic components and PCB. Then, solder them on PCB. I should be careful
I am glad that people like this TDA2030 bridge amplifier circuit as well. Many people like and want to try to create it.
I hope you will enjoy listening to beautiful music.
All full-size images of this post as PDF in the Ebook. Thanks, support me. 🙂
While it is working TDA2030 is so hot. We need to use a suitable to it is cool down.
Here are a few related Circuits you may find helpful, too:
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- 20watts Integrated Amplifier project
- LM1875, Tiny Amplifier 30 watts
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