loud class AB amplifier

[[email protected]]

LM386 when operated from 6 volts can give sufficiently loud sound.

Would it be possible to design class AB amplifier which can give that
kind of loudness but with only 3 volts battery.

Can I just use single stage class AB amplifier or .... what.

Thank you in advance
C

 

[Eeyore]

LM386 when operated from 6 volts can give sufficiently loud sound.

Would it be possible to design class AB amplifier which can give that
kind of loudness but with only 3 volts battery.

You only have half the volts available so, even ignoring for a second device
saturation losses, at best you have a 6dB quieter sound.

To regain the required volume you could try 2 AB stages operating in 'bridged
mode'. This is where the 2 amplifiers operate in anti-phase and the speaker
connects between the 2 outputs.

Graham

 

[John Fields]

LM386 when operated from 6 volts can give sufficiently loud sound.

Would it be possible to design class AB amplifier which can give that
kind of loudness but with only 3 volts battery.

 

[Charles Schuler]

To regain the required volume you could try 2 AB stages operating in
'bridged
mode'. This is where the 2 amplifiers operate in anti-phase and the
speaker
connects between the 2 outputs.

http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/37/Tm/Bridge-Tied_Load

Other stuff out there ... search on Bridge Tied Load

 

[Ron M.]

http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/37/Tm/Bridge-Tied_...

Other stuff out there ... search on Bridge Tied Load

Also commonly referred to as Balanced Transformer-Less

 

[phaeton]

http://www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/37/Tm/Bridge-Tied_...

Other stuff out there ... search on Bridge Tied Load

I presume that this would also translate into more clean headroom
(using bridged push/pull).

-ph