DRV8251A: Wanted: Application Note Sensorless speed regulation BDC motor H bridge

Hi,

I try to find a application note to create a sensorless speed regulation for a BDC motor in H bridge configuration.

I thought I could detect the speed of the motor with a measurement of BEMF and regulate it with a uC.

But all DRV * H bridge devices do not offer the measurement of BEMF.

DO yo have a application note or idea?

Best wishes