TDA2030 Bridge amplifier 


The TDA2030 amplifier IC-based single-stage amplifier project produces 14w power in its output so, the TDA2030 bridge amplifier circuit can have the ability to generate 35watts of audio output.

Before going to explaining about TDA2030 bridge amplifier circuit, we need to consider different expects of TDA2030 ICs, such as bridge circuit connection, speakers loads used at output, and power supply used for this circuit.


Tda2030 bridge amplifier circuit

TDA2030 Bridge amplifier circuit 
TDA2030 Bridge amplifier circuit


Here we can see the TDA2030 bridge amplifier circuit, talk in general, bridging of the amplifier simply means connecting two outputs towards output load.


When we consider the bridging of amplifiers, it is a process in which the power of the amplifier is multiplied 3 times than at the normal signal stage amplifier, this is happened by connecting both the channel outputs directly into the speaker, and the ground is taken as common to the whole circuit. 


TDA2030 bridge amplifier circuit working 


TDA2030 bridge amplifier circuit working
TDA2030 bridge amplifier circuit working


When we consider the working of the TDA2030 bridge amplifier, we know the circuit has two TDA2030 amplifier ICs, IC1, and IC2.


When we give input signal towards IC1, the C1 capacitor is used to filtered output DC content at the signal and passes into IC1.


After that, the IC1 produces an output signal and gets at pin4 of the IC1.

The gain controller of the IC1 is R2, R3 resistors, and C2 capacitor.


This circuit works as a bridge amplifier at this portion, as some signal portion will be feedback to inverting output pin2 of IC2 through R9.


Here also we have gain controllers R7 and R6, C5 capacitor, which is to control the gain of the IC2.


The whole process results in 3times the output more than the input signal.


Speaker output load 


We know the TDA2030 based single-stage amplifier can produce 14watts of power on 8Ω and 4Ω speakers, and in this case, we have a tda2030 bridge amplifier circuit, they simply doubles or triples the input signal, thus they can produce 35watts of power on 8Ω load.


Power supply for tda2030 bridge amplifier circuit 


The power supply used for the tda2030 bridge amplifier circuit needs to consider many factors such as estimated power delivery by the amplifier circuit, transformer current rating, overall components power ratings.


For this amplifier, we are setting a power supply, which is divided into three sections for a simple explanation, first transformer section, rectifier, and filter section.


At this power supply, we are using a 15-0-15 center-tapped transformer with a 2 amp current rating, after that, we have a rectifier stage using a bridged shaped diode network, and a last capacitor filter circuit for the filtration process.


From the output, we get a +15v, -15v, and ground power supply terminal connections towards the output.


TDA2030 Bridge amplifier circuit pcb
TDA2030 Bridge amplifier circuit pcb


TDA2030 Bridge amplifier circuit pcb top
TDA2030 Bridge amplifier circuit pcb top


Conclusion for TDA2030 bridge amplifier circuit 


In practical situations, bridge amplifier circuits have many disadvantages, but when we consider the case of the TDA2030 bridge amplifier, they produce 35watts of power at the output, so the perfect application of these amplifiers is at subwoofer amplifier circuit, which can produce power up to 100 watts.


In general subwoofer amplifiers, the situation in which we need to drive two subwoofers at a time each with its channel, the output of both amplifiers will be combined and connected to the speaker with common ground.


In some situations, bridge amplifier used at high watt applications, such as pubic audio system, imagine a situation where we have two mono amplifier boards, we need more power at this occasion under these limitations, we have only one option to combine both amplifier board and produce doubled the output than input.


Generally, TDA2030 based amplifier ICs or any other amplifier board don’t prefer bridging of amplifiers, due to many disadvantages such as bad distortion, the bridge network is the real threat for components at the amplifier circuit.

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