Power Amplifier Circuit using TDA2009

Power Amplifier Circuit – 25 Watts

Description

Here is the diagram of a 25 Watt power amplifier circuit made of  TDA 2009 IC.TDA 2009 has two channels each rating 12.5 watts on 4 Ohm load.Here the two channels are bridged to get a single out put channel weighting 25 W.

TDA 2009 IC has also built in features such as short circuit protection,thermal protection, overload protection etc using very low external components.The most interesting factor I see about this IC is that it require no dual supply.

Power Amplifier Circuit Diagram and Power Supply Circuit Schematic

power amplifier circuit

 

TDA 2009 power amplifier supply

Notes

  • Do not connect more than 24 V to TDA 2009.
  • If 5 ampere bridge is not available make one using four 5 A diodes.
  • Fit a proper size heat sink to TDA 2009
  • Do not operate the circuit without heat sink.
  • For volume control connect a 10K pot
  • All capacitors in this circuit must be rated above 25 V.
  • Capacitors with + mark are electrolytic and that lead will be positive.Other capacitors will be normally ceramic.If there is exception that will be given there in the circuit or parts list.This law applies to all circuits in this site.

We have more audio circuits that you may be interested to read; Take a look below:

1. Mosfet Amplifier Circuit

2. Simple Amplifier Circuit

3. Volume Control Circuit

4. Stereo Amplifier Circuit

5. Sound Level Meter

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10 Responses to “Power Amplifier Circuit using TDA2009”

  • suraj gope says:

    not worked with this diagram, but when i connect pin 1 & 5 as dual stereo input, it works fine

  • Steve DuBois says:

    Why are the resistors R1 and R2 different values and why are the resistors R4 and the unnumbered resistor (value 270 ohms) connected between R4 and R2 different values and unbalanced? I would like to use it to drive two piezoelectric tweeters in series (one pair each stereo channel) – do the values need to be modified?

  • SM ABUZAR says:

    i am going to make an application which requires 4 speakers.

    i am requiring a loud sound so need atlest 10 watt at the output

    hence i am planning to use this tda2009 in sterio mode .

    i will require to power up two tda2009 from same power source can you please tell me supply design reqirements and the circuit

    what if i give only 10 volts as Vs to the tda2009 ic.how many watts will it output

    can a 50watt rated tweeter work on this power

  • distortion says:

    I connected this circuit as instructed however I am having A LOT of distortion and by a lot I mean the type of distortion that makes songs barely recognizable. Any help please?

  • seetharaman says:

    Hi TDA2009 connect slider of the 10K pot to C1, one end of the pot to ground and the other end of the pot to signal in.

  • tda2009 says:

    where can I mount the 10 k pot?

  • prashant kumar says:

    Hi,

    I am from hyderabad, and i am new to this field, i want to build my RC receiver and transmeter for first RC plane.

    plz can any one help me to build my own receiver and transmeter for my project

    Regards
    Prashant kumar

  • Jonathan says:

    Definately cannot use a 4ohm spkr in bridged mode. The power supply shown is simply the wrong circuit for this amp. You need 24 volts at 2 amps, which an 18 volt AC transformer will supply.

  • seetharaman says:

    Please note the speaker should be 8 ohms and the transformer rating should be 18Volt rms at 2 amps for the rated 25watts into 8 ohms with a good quality heat sink for the IC. (really a good quality amplifier with least distortion). with 18 volt 5amps with 4 ohms load the power delivered will be around 50watts. not recommended for this application. with the 24 volt secondary as shown the peak DC out put will be 34Volt which will destroy the ic instantly. with 4 ohms load in bridged configuration donot exceed 14Volt AC at 2amps, which will deliver 25watts into 4 ohms.

  • quero esqumas de circuito de potencia amplificador!