Hi,
As you know that 3 phase current is required to construct 3 phase coordinator for FOC control, so at least, 3 OP AMPs are required.
The MCXN has on-chip OP AMPs with internal resistor network, but the current power stage board has on-board OP AMPs, so there is not solution to use internal OP AMPs to amplify the 3 phase current which are sample by connecting shunt resistor on the bottom branches.
But using internal OP AMPs for FOC control are under way for MCXA family including redesigning the power stage board and MCXN processor board.
We have OP AMP firmware in SDK package.
You can download SDK package from the website:
Hope it can help you
BR
XiangJun Rong
