Audio Amplifier battery operated

[ewandeur]

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

 

[rkodaira]

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**

 

[dindeds]

I've built this and its OK - but running 2W using PP3 9V battery? You must hv a good supply of the stuff!

https://www.redcircuits.com/Page33.htm

 

[ewandeur]

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.

 

[zuisti]

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

 

[Ave_Rapina]

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.

Hello

use an Piezo twetter to achive more db´s.


Regards

 

[eanic]

here circuit you use Vcc 8..18V.
https://www.elecfree.com/amp10w+10w.php