Design of audio amplifier

[sathiyanarayananL]

hi,

I would like to know what is the audio input positive and negative signal in general, also will it work if i interface the audio signal from mobile phone ( 3.5mm jack ) to the left and right positive pins and grounding the negative pins?

please find the attached image.

thankyou

 

[betwixt]

You should be able to use the example schematic at page 18 of the data sheet. DO NOT connect the LINN and RINN pins together, use capacitors as shown in the diagram. You can connect the right and left channels from the 3.5mm jack to the LINP and RINP pins as shown.

Brian.

 

[Audioguru]

Figure 33 on page 18 in the datasheet shows single-ended inputs but the input signal source has no ground because it was written by a stupid little kid who recently graduated from school.
Doesn't anybody at TI check for errors like that?

 

[betwixt]

It's more symbolic than a full design but Audioguru is right. The ground reference for the input signals is pin 8 of the IC.

Brian.