DRV8312-69M-KIT or DRV8301-69M-KIT for a PMSM ?

DRV8312 based will support 3.5A continuous, so if you want to do full load testing you will want to use the DRV8301, which is set to handle 40A max current readings.

You will get slightly better performance from the DRV8312 at low speed due to the current scaling being better resolution, but you can also look further at that when you go to your own hardware.  The DRV8301 current sensing is also a bit noisier at high speed due to the sense layout.

Tough call with your motor, but if you really want to load it fully go DRV8301. If you understand that limitation and are more interested in the low speed performance, use DRV8312.

Please also join us at the InstaSPIN forum so we can assit you more quickly witht the SW questions.  Make sure you use the latest SW releases as well.

Chris,

just to clarify:

At the schematic of the datasheet of the DRV8312 the motor is directly connected with the DRV8312, no extra power MOSFET  are used.

The DRV8301 requires always external power MOSFETS.

Is this right?

Markus