DRV8825: RMS output current for DRV8825

Pang

Expert 2415 points

Part Number: DRV8825

Hi Ti,

Referring to the DRV8825 datasheet, max RMS output current applied to each winding is 1.75A rms or 2.5A peak.

The max 2.5A peak is it refer to only positive or negative current of one of the motor winding measurement as below?

Is measurement below with 1.36A peak current which is within DRV8825 2.5A peak spec?

over 8 years ago

0 Rick Duncan over 8 years ago

TI__Guru** 114905 points

Hi Incognito,

The max 2.5A peak is it refer to only positive or negative current of one of the motor winding measurement as below?

The maximum peak refers to only the positive or negative current peak.

The maximum peak current is set using equation 1 of the datasheet.

0 Pang over 8 years ago in reply to Rick Duncan

Expert 2415 points

Hi Rick,

Please help to confirm that the chopping current in equation 1 of the datasheet refers to maximum peak current not the RMS current, is that right?

0 Rick Duncan over 8 years ago in reply to Pang

TI__Guru** 114905 points

Hi Incognito,

Yes, the chopping current refers to maximum peak current when the electrical angle of Table 2 is 90, 180, 270, or 360 degrees.

Motor drivers

Motor drivers forum

DRV8825: RMS output current for DRV8825