Stereo power audio amplifier circuit tda2009 10 + 10 watts

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The TDA2009A is class AB dual Hi-Fi Audio power amplifier assembled in Multiwatt package, specially designed for high quality stereo application as Hi-Fi and music centers.


  • High output power
  • (10 + 10w min. @ d = 1%)
  • High current capability (up to 3.5a)
  • Ac short circuit protection
  • Thermal overload protection
  • Space and cost saving : very low
  • Number of external components
  • And simple mounting thanks to the
  • Multiwatt package.

Build-in protection systems
Thermal shut-down
The presence of a thermal limiting circuit offers the following advantages:
1) an averload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood.

2) the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature : all that
happens is that Po (and therefore Ptot) and Io are reduced.

The maximum allowable power dissipation depends upon the size of the external heatsink (i.e.its thermal resistance);

Short circuit (AC Conditions).
The TDA2009A can withstand an accidental short circuit from the output and ground made by a wrong connection during normal play operation.

Mounting instructions
The power dissipated in the circuit must be removed by adding an external heatsink.
Thanks to the MULTIWATT
package attaching the heatsink is very simple, a screw or a compression spring (clip) being sufficient. Between the heatsinkand thepackage it isbetter to insert a layer of silicon grease, to optimize the thermal contact, no electrical isolation is needed between the two.

Schematic of the power sound amplifier stereo with tda2009

tda2009 power amplifier schematic

Suggestion of assembly of the amplifier stereo with tda2009

tda2009 power amplifier PCB

Information for tda2009

The power source is simple from 12 to 18 volts max. with current of 2 amperes.

It lists of components for assembly of the amplifier stereo with tda2009

Part List

C1, C22.2µ Capacitor electrolytic
C322u Capacitor electrolytic
C4, C5220u Capacitor electrolytic
C6100u Capacitor electrolytic
C7, C8, C9100n Capacitor polyester – 104 , 100n or 0.1
C10, C112200u Capacitor electrolytic
IN-LTerminal block connector 2 screws – Left Audio input
IN-RTerminal block connector 2 screws – Right Audio input
OUT-LTerminal block connector 2 screws – Left Audio Output
OUT-RTerminal block connector 2 screws – Right Audio Output
VCCTerminal block connector 2 screws – Power supply connector
J2Jumper 12mm
J3Jumper 12mm
MiscellaneousPrinted Circuit Board, Welding, Wires, Box, etc.
R1, R31k3 Value not commercial, use 1k2 – Black, Red, Red, Gold
R2, R418 Ohms – Brown, Gray, Black, Gold
R5, R61 Ohms – Brown, Black, Gold, Gold

All capacitor voltage
Power supply >=18V = Capacitors 25V
Power supply <=19V capacitors 35V

Datasheet TDA2009

Download files for this assembly – PDF PCB, Schematic,PDF, silk screen, TDA2009 and Datasheet.

Download PDF



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2 thoughts on “Stereo power audio amplifier circuit tda2009 10 + 10 watts”

  1. Sir Good Day, I build this project, but It did’nt work. please help me how to do it. my pcb layout was correct and schematics also. can you show me a finished and working hardware of this circuit please? thanks in advance

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