DRV8884: drv

uhtis

Expert 1110 points

over 8 years ago

0 Rick Duncan over 8 years ago

TI__Guru** 114905 points

Hi Uhtis,

Can you provide the RREF value, MODE, TRQ and DECAY settings, and a screen shot of the current?

0 uhtis over 8 years ago in reply to Rick Duncan

Expert 1110 points

0 Luis Riveros over 8 years ago in reply to uhtis

TI__Expert 4435 points

Hi Uhtis,

Based on the value you provided for RREF, the chopping current should be from 50mA to 57mA (this is not considering tolerance from resistor) so 60mA seems correct based on the current regulation equation provided on section 7.3.4 on the datasheet.
For an output current closer to 75mA please use a 400kOhms resistor. Thank you.

Motor drivers

Motor drivers forum

DRV8884: drv