TDA7828 - what is that?

[l_ph]

Hello!
Our company recieved from the official dealer in our country the TDA7828 chip. The seller claims that this is an improved version of the TDA7850, but we never heard about. Is it so?
I did not find information about this chip on your site. Where can I get its datasheet and description?

But what is the difference between the 7828 and 7850?Can the two models of products be replaced directly without changing the external circuit?
Sorry for the trouble and thank you in advance.
Yours faithfully,

l_ph

[AScha.3]

maybe wrong spelling , could be : tda7288   or tda7388 

see the datasheets for > replaced directly without changing the external circuit?

just for me , looking at ds , the TDA7850 is the "better" chip. more power, less distortion. 

[l_ph]

This model exists, and I need the data manual of TDA7828.