Powering TDA7492P

[luisxd]

First of all i want to introduce myself to the forum, my name is Luis and im from México, i'm new to audio electronics but i hope i can learn from all of you 😛

I'm currently using this amp with a 12v adapter, but i was wondering if there's any issue using it on 9v, does the loss of output W's is any big or noticeable?

Also i wanted to know how does the input current affects the amp?, (i.e. whats the diferencia between 1A and 1.3A)

Thanks in advance 😱

 

[trashcanz]

Hello Luis,

At 9V, you will typically be getting half of the watts you would get with 12V according to this datasheet with 6R speakers.

For current, you can use formula P = VI as an estimate. So at 9V, ~1.2 amps is enough but it does not hurt to have some headroom.

 

[trashcanz]

I just noticed you are using a board with built in bluetooth. You should factor in the power draw of the bluetooth module as well as any voltage converters that may be on the board. Amplifier power output will decrease if there is not enough current.

 

[luisxd]

Im using the 50w+50w version, found this chart:

(with a load of 8 ohms)

So, according the that graphic, im getting less that 10w on each output? 😕 (im using 8ohm drivers, 12v 1A adapter)

what does THD stands for?

found here (pdf)