Any idea about how this circuit work?

Thread Starter

Stéphen Grosjean

Joined Nov 21, 2018
8
Hi, I try to know what this circuit is about
And how it work
I think it’s a circuit for audio amplification, it has a TDA2822 chip in it.

Mod: cleaned up your image.E

tda1.jpeg
 
Last edited by a moderator:

DickCappels

Joined Aug 21, 2008
10,152
There is no schematic or other illustration accompanying your post. Other than to note that the TAD2822 was intended to be used as an audio amplifier, not other comment may be made about your circuit at this time.
 

Thread Starter

Stéphen Grosjean

Joined Nov 21, 2018
8
There is no schematic or other illustration accompanying your post. Other than to note that the TAD2822 was intended to be used as an audio amplifier, not other comment may be made about your circuit at this time.
Well I don’t have a schematic other than the image itself that’s why I’m asking about it
I’ll try to make a schematic out of the pcb
 

bertus

Joined Apr 5, 2008
22,270
Hello,

When you do not have a schematic, you will have to trace out the board.
The datasheet will give you information on the function of the pins.
There are also some test schematics in there.

Bertus
 

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JWHassler

Joined Sep 25, 2013
306
The pin numbering in your schematic is wrong... 8 and 7 on your drawing should be 4 and 3

Edit; so it's an audio amp with one channel unused
 

Thread Starter

Stéphen Grosjean

Joined Nov 21, 2018
8
The pin numbering in your schematic is wrong... 8 and 7 on your drawing should be 4 and 3

Edit; so it's an audio amp with one channel unused
I Know but it was easier to read reversed to the Pins are correct
I know it's an audio AMP but what I don't know is what the cables are for ? VDD, VSS, SP+, GND, IN?
 

DickCappels

Joined Aug 21, 2008
10,152
VDD, Positive power supply
VSS, negative power supply
SP+, Speaker output (probably with respect to ground, otherwise with respect to VSS)
GND, Common electrical connection for all signals in and out
IN Audio inpu
 

Thread Starter

Stéphen Grosjean

Joined Nov 21, 2018
8
VDD, Positive power supply
VSS, negative power supply
SP+, Speaker output (probably with respect to ground, otherwise with respect to VSS)
GND, Common electrical connection for all signals in and out
IN Audio inpu
Thank's a lot, I made it work, sound was really bad and even after cleaning the signal it was not good, I tried something and blew the chip ^^
Thank everyone for your help!
 
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