TDA Amplifier Circuits

TDA integrated circuits series are very well apreciated and used in amplifier designs and projects. TDA audio amplifier circuits are produced in generally by Philips and SGS-THOMSON. The most used ICs are TDA2030 and TDA2003 for small audio amplifiers kits and TDA7294 for higher power amplifiers.
In this article we present some representative amplifiers schematics with TDA circuits: car and home audio amplifiers with datasheets below every circuit diagram.

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TDA2003 amplifier circuits

TDA2003 is a cheap amplifier that is designed to run on single rail power supplies (unipolar). It provides a high output current capability (up to 3.5A), very low harmonic and cross-over distortion.

TDA2003 10W car radio audio amplifier
tda2003 amplifier

TDA2003 bridge 18W amplifier

TDA2003 can be used as an BCL (bridge amplifier) and car deliver up to 18W.
tda2003 bridge bcl

TDA2005 amplifier circuits

TDA2005 is a class B dual audio power amplifier specifically designed for car radio applications. Its high current capability (up to 3.5 A) and the ability to drive very low impedance loads (down to 1.6 ohms) makes this circuit a good choice for cheap power booster amplifiers.

TDA2005 stereo amplifier 2x10W
tda2005 stereo

TDA2005 bridge amplifier 20W
tda2005 bridge

TDA2030 amplifier circuits

TDA2030 is a monolithic integrated circuit in Pentawatt package, intended for use as a low frequency class AB amplifier. Typically it provides 14W output power (d = 0.5%) at 14V/4Ω at ± 14V or 28V, the guaranteed output power is 12W on a 4Ω load and 8W on a 8Ω

TDA2030 amplifier circuit 20W
tda2030 diagram

TDA2030 PCB layout
tda2030 cab
tda2030 pcb

TDA2030 Assembly
tda2030 assembly

TDA2030 Bridge amplifier 35W
tda2030 bridge

TDA2050 amplifier circuits

TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide up to 35W true rms power into 4 ohm load @ THD = 10%, VS = ±18V, f = 1KHz and up to 32W into 8ohm load@ THD = 10%, VS = ±22V, f = 1KHz. Moreover, the TDA 2050 delivers typically 50W music power into 4 ohm load over 1 sec at VS= 22.5V, f = 1KHz.

TDA2050 amplifier 35W


tda2050 datasheet

TDA7294 amplifier circuits

TDA7294 is a monolithic integrated circuit in Multiwatt15 package, with high output power (up to 100W) intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Topclass TV). Thanks to the wide voltage range and to the high out current capability it is able to supply the highest power into both 4W and 8W loads even in presence of poor supply regulation, with high Supply Voltage Rejection.

TDA7294 amplifier 100W
tda7294 amp

TDA7294 PCB layout

TDA7294 Assembly

TDA7294 bridge amplifier 250W
tda7294 bridge


Join the conversation!

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  • harry

    Can anyone tell me the exact voltage and current ratings of Xmer needed to give a good quality sound with TDA7294

  • stamcar

    It doesnt

  • henry

    Is true that this TDA7294 works?

  • stamcar

    circuit of TDA7294 doesnt work 🙂

  • Stamcaar

    I made TDA7294 amplifier. I used your PCB. So can anyone tell me why have my speaker sound like there is short circuit? I used transformer 2x24v/100VA, so there is voltage 22v-0v-22v. If I understand true, there is +-44V, so maybe the transformer is problem or what?
    Best regards.

  • paul obwaya

    of cause i have to do a lot of research in order to finalize my work with out any error and so could not tell you by now

  • vlaedu

    Hello, how do you make the calculus for choosing the resitances and capacitors for the tda 7294 circuit?

  • Neil Bryan Daculan

    TDA is the One of favorite circuits……

  • مهرداد

    ، مدار ها عالی هستند
    من چند تا را ساختم، کیفیت صدا عالیه
    ممنون 🙂


    Well, I have used the TDA7294 in the bridge configuration to drive a 200Watt Subwoofer Driver (Speaker). The subwoofer driver (speaker) is of American Make manufactured by BOSTON. I have used a very well regulated power supply of +/- 33VDC @ 8 Amps (Transformer rating: +/-24V AC @ 8Amps). During power up, there is no Pop & Click noise, sound generated is decent when the volume control is adjusted to about half of the traversing area of the potentiometer (100K Ohm). But on higher volume, the IC to which the signal is fed, burns out. I have literally burnt three of these ICs trying to figure out the problem, but still unresolved. I think that the current supplied is too high for the IC to handle. Users can use transformers of +/-24 V AC @ 5 Amps, without hassle. But I can guarantee, that if people use a 100 Watt Subwoofer driver (Speaker) and drive the signal to the max volume, these ICs wil be able to handle the load. Please be cautious not to exceed the voltage limit beyond +/- 35 V DC, as it will prematurely damage the ICs.

    • r de vreede

      You need bootstap bjt. Since you can’t cool the unit when you use high power : <1k/w, impossible to cool, but did you have a thermal shutdown unit(s) used?….. zThese are all the very basic schematics you can make on this page, but the ic gives perfect sound till 50 Watts, that's it….. and then you need bootstrap transistors or fets(less ) Which use a higher votage and can be used as votage stabilzer and after that a power bridge and then you can achieve 150 watts rms. Don't forget that this ic ain't newbie……

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