Circuit power audio amplifier TDA2040 20 Watts

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The TDA2040 is a monolithic integrated circuit in Pentawatt  package, intended for use as an audio class AB amplifier. Typically it provides 22W output power (d = 0.5%) at Vs = 32V/4Ω. The TDA2040 provides high output current and has very low harmonic and cross-over distortion. Further the device incorporates a patented short circuit protection system comprising an arrangement for automatically limiting the dissipated power so as to keep the working point of the output transistors within their safe operating area. A thermal shut-down system is also included.


Vs – Supply Voltage: 12 at 32 V
Io- Output Peak Current (internally limited) 4 A
Ptot – Power Dissipation at Tcase = 75 °C: 25 W
Tstg, Tj – Storage and Junction Temp. -40 to 150°C

Schematic diagram of the audio power amplifier tda2040

TDA2040 schematic

Suggestion for PCB amplifier circuit tda 2040

TDa2040 PCB
TDA2040 audio amplifier PCB layout
TDA2040 PCB silk

List of components for the amplifier

C11µF/35v – Electrolytic Capacitor
C2,C422µF/35v – Electrolytic Capacitor
C3220µF/35V – Electrolytic Capacitor
C5100nF polyester film Capacitor
C6220nF polyester film Capacitor
C72200µF/35v Electrolytic Capacitor
INAudio input
VCCPower supply
OUTAudio output
Resistors 1/4 Watts 5%
R1, R2, R3, R522k Red, Red, Orange, Gold
R4680 blue, Gray, Brown, Gold
R64.7 Yellow, violet, Gold, Gold
Power supply, heat-sink to the IC, printed circuit board, solder, Box, Speakers 30 watts 4 Ohms

Download the PDF for the pcb for  circuit and power amplifier

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14 thoughts on “Circuit power audio amplifier TDA2040 20 Watts”

  1. some componant in partlist is difer from schematic diagram.[R2 is 20K and C6 is 100nF in schematic diagram, but in the part list R2 is 22K and C6 is 220nF].which is reyal

  2. Does TDA 2040 need a pre amp ,I want to connect to DTH audio output {sattelite reciever }.I have build a circuit ,but there is no sound yet .Do i need 2200 or 220micro F to my speaker ,pls reply


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Crash Course Electronics and PCB Design
Crash Course Electronics and PCB Design
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS
DC circuits, operational amplifiers, EXERCISES, SIMULATIONS