10 W Power amplifier based TDA2003 | Schematic Diagrams


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10 W Power amplifier based TDA2003

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10 w amplifier 300x193 10 W Power amplifier based TDA2003This 10 W Power amplifier, is simple to perform, and works with a single power source between 12 V and 18 V. It is based on the use of type TDA2003 integrated amplifier, capable of its own to deliver around 10 W power to the load of 2 ohms and the power supply voltage of 18 V, the distortion level of 10% (0.15% up to 7.5 W). With the use of two types of integrated circuits is in bridge mode, it is possible to quadruple the output power amplifier to 40 W (2 ohm load, with 18 V power supply and a distortion of 10% – 30 W max for the distortion of 0.15%).

The 10 W Power amplifier circuit diagram, based on the application note from SGS-Thomson, suggests the relative simplicity of this achievement. And that’s mainly what made the TDA2003 is popular (according to the TDA2002, a little less powerful but you can use here without changing anything else in the components).

Speaker impedance and output power
You can use an speaker or a combination of speaker with a value between 2 and 8 ohms. The power of 10 W for 2 ohms specified (2 speaker 4 ohms connected in parallel, for example) will decrease if you choose an speaker impedance higher (in the case of all the audio amps). For Power supply 18 V.
With 1.6 ohms: 12 W to 10% distortion – 9 W 0.15% distortion
With 2 ohms: 10 W to 10% distortion – 7.5 W for 0.15% distortion
With 3.2 ohms: 7.5 W at 10% distortion – 5.6 W for 0.15% distortion
With 4 ohms: 6 W at 10% distortion – 4.5 W for 0.15% distortion
With 8 ohms: 3 W – but the TDA2003 has not really been designed to work with a load as “high”.

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