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Audio Amplifier battery operated

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ewandeur

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Hi,

I´m in need of an audio amplifier schematics, who can deliver at least 2W @9V battery to be used in a portable equipment.

Tkx
 

For which load ? (4 ohms, 8 ohms)
Try TDA7299 and TEA2025 and TDA1904

Obs: escreva um pouco em ingles senao o pessoal do forum reclama.

Com bateria dessas quadradas de 9V seu aparelho nao vai funcionar por muito tempo. Com alto falante de 8 ohms voce nao consegue 2W, com um de 4 ohms até vai conseguir, mas por pouco tempo (menos de 1h). Tente alguns amplificadores integrados tipo TDA7299 ou TEA2025

**broken link removed**
https://www.st.com/stonline/products/literature/ds/1523/tea2025.pdf
**broken link removed**
 

    E

    ewandeur

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Thanks for your help, i've just pressed the button (helped me).

By the way, I will use this amplifier with a 4 ohm miniature tweeter to deliver "burst of sound" like in an car alarm, so I think the 9V battery will do the job.
 

Sorry but I think the battery's lifetime there isn't too long... Use an accu!
 

ewandeur said:
Thanks for your help, i've just pressed the button (helped me).

By the way, I will use this amplifier with a 4 ohm miniature tweeter to deliver "burst of sound" like in an car alarm, so I think the 9V battery will do the job.
Click to expand...

Hello

use an Piezo twetter to achive more db´s.


Regards
 

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    ewandeur

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