How to use the Back EMF outputs of the DRV8302 Aliexpress board?

hardware support
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HI Runger!

In this document, it proposes to compare each (filtered) phase with Bus Voltage, instead of virtual neutral. What it bus voltage in this driver? Is it the full Voltage applied to the motor? VIN?

Would it look to something like this?

bldc-bemf-signal-detection from VBus Voltage
bldc-bemf-signal-detection from VBus Voltage981×585 89 KB

Would bus-voltage be that VPVDD-out pin in the board right beside the BACKEMF A,B and C output pins?

I believe that in this board, looking at the schematics, that each BEMF is already filtered before being buffered. And the VPDD-out voltage too.

Thanks, Rodrigo