Mismatch of current sensing with 3-shunt topology at the EVSPIN32G4 board

[rokkie]

Hello,

I'm struggling with frequent overcurrent faults at the EVSPIN32G4 board.

I found some mismatch of current sensing with 3-shunt and 2-OPAMP topology.

Default current sensing for EVSPIN32G4 is described as following diagram at motor control workbench.

 

But, the EVSPIN32G4 schematic drawing is as follows. 

It is a mismatch of the MC workbench and the schematic of EVSPIN32G4  

[MC workbench : W Phase] OPAMP2 (+) : PB0, OPAMP2 (-) : PC5, OPAMP2 (out) : PA6

[Schematic: V Phase]  OPAMP2 (+) : PA7, OPAMP2 (-) : PC5, OPAMP2 (out) : PA6 

I'm wondering about this mismatch and it might be the cause of overcurrent fault.  

Thanks for any advice in advance.

[GMA]

Hello @rokkie,

Using MCSDK6.3.2, I have a correct description on current sensing:

Are you using a modified board description?

[rokkie]

No. I am using the original EVSPIN32G4 board. 

As I mentioned it, the current sensing is a little different between MC workbench and EVSPIN32G4 schematic. 

[GMA]

Hello @rokkie,

Maybe I did not catch your point.
In workbench schematic you can notice that V Phase is a Shared Phase between OPAMP1+ and OPAMP2+ (thanks to OpAmp + input mux). Then OPAMP2 (+) input could be PB0 or PA7.

[rokkie · Accepted solution]

Thanks for the quick response. 

As you mentioned it at the MC workbench diagram, 

W phase is connected with OPAMP2 pins through GPIOs as follows : PB0(IN+), PC5(IN-), and PA6(OUT).

But, as according to following table from the EVSPIN32G4 schematic, 

OPAMP2 pins are connected with GPIOs : PA2(IN+), PA7(IN-) and  PA6(OUT) .

I would like to know this H/W current sensing topology be matched with the automatic generated codes by the MC workbench.