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Sci.Electronics.Basics -> Amp Power Supply

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Author: Dave.H
Date: 01:36 23-05-08


I'm building an amplifier for my iPod, based on two LM380 chips, I was
wondering if you could parallel the two amplifier sections off the one
battery supply, which will be a 9 volt battery in series with two AAA
batteries.

Amplifier circuit:
http://www.guidecircuit.com/Circuit-Audio-LM380-PERSONAL-STEREO-AMPLIFIER.htm

Thanks,
Dave
Australia

Author: John Popelish
Date: 01:39 23-05-08

Dave.H wrote:
> I'm building an amplifier for my iPod, based on two LM380 chips, I was
> wondering if you could parallel the two amplifier sections off the one
> battery supply, which will be a 9 volt battery in series with two AAA
> batteries.

Yes.

> Amplifier circuit:
http://www.guidecircuit.com/Circuit-Audio-LM380-PERSONAL-STEREO-AMPLIFIER.htm

--
Regards,

John Popelish

Author: Phil Allison
Date: 02:04 23-05-08


"Dave.Halfwit "
>
> I'm building an amplifier for my iPod, based on two LM380 chips, I was
> wondering if you could parallel the two amplifier sections off the one
> battery supply, which will be a 9 volt battery in series with two AAA
> batteries.


** No.

LM380s are not suitable for 9 volt radio battery operation.

The LM386 is.


...... Phil






1


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