burnt audio IC

Status
Not open for further replies.
K

khalaf

New Member
hi everybody,

i have a subwoofer of about 300watt, the IC responsible for speaker amplifier was burnt and i can't read its number,
i draw the circuit and it seems as a dual-opamp IC, but all the dual opamp ics i've found are of different connection
so i drew the schmatic and sent it to you in the hope that you may help me finding the right IC.

note: it is a dual opamp without external feedback.
the included schematic is of the IC.

i need your help please.[/img]
 

Attachments

  • unknownic.jpg
    25.9 KB · Views: 843
An unknown IC?, in an unknown amplifier?, how is anyone supposed to be able to offer advise on that?.

For a start you might try mentioning the make and model of the unit, and what the IC actually does! - perhaps someone has seen one before?.
 
yes man,

thanks alot for interest ,

but i mentioned that it is a dual-opamp IC , so it is an operational amplifier, but the matter is that i has different connection pins from all the dual-opamps i've dealed with, so u have just to find a dual-opamp IC that match the pin assignment as shown in the pic,

thanks again for interest
 
The Picture needs help. I tried to fix it but still can not read the values.
 

Attachments

  • unknownic.gif
    15.2 KB · Views: 771
hey everyone,
i finally found the chip i'm seeking, it is TDA2822M, i bought it and soldered it to the subwoofer and it is working properly now, thanks alot for paying attention and i'm ready for any help
 
khalaf said:
hey everyone,
i finally found the chip i'm seeking, it is TDA2822M, i bought it and soldered it to the subwoofer and it is working properly now, thanks alot for paying attention and i'm ready for any help
Click to expand...

I thought you said this was a 300W subwoofer?, and the chip you were looking for was a dual opamp?.

The TDA2822M is a dual low power amplifier (not an opamp), which outputs about 0.5W per channel - assuming it's bridged?, you could get about 1W mono from it, or really pushed about 2W at pretty high distortion.

So assuming this is the 'power amp' for your sub-woofer, you only have a 1W subwoofer!.
 
hotwaterwizard said:
I would bet they use it as a preamp or Driver amp
Click to expand...

It's not really suitable for either?, more likely it's a computer sub-woofer, and only really 1W?.
 
hotwaterwizard said:
Here is an example of what I am talking about.
Click to expand...

Yes, it's fairly common practice, using an OPAMP as part of a power amp, but the chip in question ISN'T an opamp, and it wouldn't be very suitable. It's also VERY unlikely that such an opamp would be destroyed and unable to have it's number read!.
 
Status
Not open for further replies.

Similar threads

J
Ic replacement
Replies
1
Views
4K
danadak
SMD transistor/ic "5131Z"
Replies
6
Views
4K
Grossel
Does a megaphone IC exists ?
Replies
3
Views
3K
Nigel Goodwin
M
IC MIP801 Datasheet
Replies
0
Views
2K
m_ghaff
M
Clearaudio basic - IC (probably opamp) name scraped away
Replies
19
Views
5K
KeepItSimpleStupid
K
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…