TDA2009 amplifier circuit diagram stereo TDA2009A

tda2009 power amplifier stereo 3d board

TDA2009 amplifier circuit diagram, stereo TDA2009A. 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 overload 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 happen 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 heatsink and the package it is better 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 Amplifier Circuit Diagram Stereo Tda2009A

PCB for  the amplifier stereo with tda2009

Printed Circuit Board- Pcb Top Amplifier Stereo With Tda2009
Printed Circuit Board Component View – Pcb Amplifier Stereo With Tda2009

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

BOM of the amplifier stereo with tda2009

Part List

Components Value
C1, C2 2.2µ Capacitor electrolytic
C3 22u Capacitor electrolytic
C4, C5 220u Capacitor electrolytic
C6 100u Capacitor electrolytic
C7, C8, C9 100n Capacitor polyester – 104 , 100n or 0.1
C10, C11 2200u Capacitor electrolytic
IC1 TDA2009A
IN-L Terminal block connector 2 screws – Left Audio input
IN-R Terminal block connector 2 screws – Right Audio input
OUT-L Terminal block connector 2 screws – Left Audio Output
OUT-R Terminal block connector 2 screws – Right Audio Output
VCC Terminal block connector 2 screws – Power supply connector
J2 Jumper 12 mm
J3 Jumper 12 mm
Miscellaneous Printed Circuit Board, Welding, Wires, Box, etc.
R1, R3 1k3 Value not commercial, use 1k2 – Black, Red, Red, Gold
R2, R4 18 Ohms – Brown, Gray, Black, Gold
R5, R6 1 Ohm – Brown, Black, Gold, Gold

All capacitor voltage
Power supply ≥ 18V = Capacitors 25V
Power supply ≤19V capacitors 35V

Datasheet TDA2009 UTC

Download the printed circuit boards in PDF, PNG and Gerber for the Amplifier Circuit.

Download PDF


Download TDA009 PDF Datasheet ST

See also the stereo amplifier with the same IC

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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

2 thoughts on “TDA2009 amplifier circuit diagram stereo TDA2009A”

  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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