5206-2S power H-bridge controller compatibility problem

[eagle1109]

Hi guys,

We have this training board for electronics sensors course, and they sent me this board with multiple expanaion boards problems so I fixed most of them.

But this expansion board has a DC motor controller integrated circuit, which is broken so I ordered a lot from Aliexpress thinking it's that simple like every time.
So the parts arrived, I soldered one and tried it and it didn't work !!

Then I ordered another lot, and tried it and it was the same result.

This is the training board, with the expansion board I'm talking about, which runs the DC motors on the right expansion board:

This is the expansion board:

This is the lot I bought:

This is the working IC:

You can see that the actual IC number is 5206-2S which is the same one I bought but I think it must also in this case to have the same model number which is GAE921.

The problem now is that I can't find the same IC with the same auxiliary number.

 

[FvM]

There's no thing like an auxiliary number. It's probably a date or factory code.

 

[eagle1109]

OK, but why this one with this code which is the IC that came from the kit factory that only works. Where the parts I bought from aliepxress couple times didn't work ?

I'm afraid to order again and get the same result.