Circuit power audio amplifier IC tda2002 – 8 Watts

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This is a class AB audio power amplifier circuit which built using a TDA2002 or TDA2003 power amplifier IC module. These are replacements for the original LM383 which is no longer available. It is easy to build and has a minimum of external components. The module has both short circuit protection and thermal protection. It can drive loads as low as 1.6 ohm and is capable of delivering over 10 watts from a 16 V supply.

The TDA2002 and TDA2002A are integrated circuit amplifiers specially designed for use in car radios, where the adverse electrical environment places great demands upon the reliability of circuits.

The supply voltage may be anywhere between +8 and +18V, and the IC will accept transient voltage peaks of up to 28V without damage. The IC can supply a short-circuit output current of 3.5 A and 15W of power at a case temperature of 90°C. At a supply voltage of 14.4V (fully charged battery ) the maximum output power is at least 4.8W, and typically 5.2W into a 4Ω load.

The IC will, in fact, drive load impedance’s as low as 2Ω, in which case the maximum output power is at least 7W and typically 8W. The above power are all measured at 10% distortion, but obviously at lower output powers the distortion is much less (Typically 0.2% ).

Specifications:

  • C. Input: 8 – 18V, 10 – 20 VA min.
  • Power output:
    • > 10 W RMS, 2 ohm load, 16V DC supply.
    • > 6W RMS, 4 ohm load, 16V DC supply.
    • > 4W RMS, 4 ohm load, 12V DC supply.
  • THD: < 0.2% (1W, 4 ohm load) Gain: 40 dB maximum. S/N ratio : > 80 dBA. (G = 20 dB) > 60 dBA (G = 40 dB)
  • Frequency response: < 20 Hz to > 40 kHz (-3dB, 4 ohm load)
  • Input level:
    • < 100 mV for full output (G = 40 dB)
    • < 1V for full output(G = 20 dB)

Schematic diagram of the audio power amplifier tda2002

Amp TDA2002 Schematic

Suggestion for PCB amplifier circuit TDA2002

Amp TDA2002 PCB
V2
Amp TDA2002 PCB
V1
Amp TDA2002 PCB
layout

List of components for the amplifier

PartsValue
Capacitors
C110µF 25V Electrolytic Capacitor
C21000µF 25V Electrolytic Capacitor
C3470µF 25V Electrolytic Capacitor
C1 , C3100nF Polyester or ceramic capacitor – 100n, 0.1, .1, or 104
C239nF Polyester or ceramic capacitor – .039, 39n or 393
Semiconductors
IC1TDA2002 or TDA2003
Connectors
INTwo-terminal connector signal input
OUTTwo-terminal connector Audio Output
PWRTwo-terminal connector Power Supply
R1220 Ohms – Red, Red, Brown, Gold
R239 Ohms – Orange, White, Black, Gold
R31 Ohm / 1Watt – Brown, Black, Gold, Gold
R42.2 Ohms – Red, Red, Gold, Gold
Miscellaneous
P150k -Ohms Potentiometer to adjust the volume
OthersHeat-sink, power supply, wires, PCB, etc.

For more information on the integrated circuit tda2002 see datasheet!

Download the PDF for the PCB for  circuit power amplifier

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12 thoughts on “Circuit power audio amplifier IC tda2002 – 8 Watts”

  1. Could you please post/send the file design of this litle project? it would be really usefull. Thanks.
    davedicius-at-gmail.com

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