L6207Q Vref maximum level

[SZizi]

Hi all,

I have a question about the full bridge driver L6207Q.

About the VREF signal, in my design I am going to drive it with a DAC with maximum output voltage above 1V.

I would avoid to insert an attenuation stage between DAC output and L6507Q VREF input.

Is advisable and , if yes, how much is possible​ to overcome the recommended maximum VREF level of 0,5V suggested in page 9 of AN1762?

My goal value for VREF max is around 0,7 - 0,75V. What kind of drawbacks I would face in this case?

Thanks for your attention,

Sergio

[Enrico Poli]

Hi Sergio,

the higher is the reference voltage, the bigger will be the power dissipation in the shunt resistors of the application . The 0.5 V indicated in the AN usually gives a good trade-off between power dissipation and sensing precision. However, your target value is still in a good region :smiling_face_with_smiling_eyes:

Regards

Enrico