DRV8845: can this device be used to drive a 36V DC bus stepper motor?

justifice zhou

Intellectual 400 points

Part Number: DRV8845

Hi,

For BLDC, we often choose a higher voltage level IC in a lower DC bus system because the DC bus will rise during brake.

But I'm not sure if it's the same for stepper motor.

And how much margin voltage should we have.

over 1 year ago

0 Ryan Kehr over 1 year ago

TI__Guru 55615 points

Hello,

As you are always regulating current with a stepper motor, there is not as much margin needed. However, you would be operating near the abs. max and above the recommended max for the DRV8845.

I would consider a device like the following with a higher voltage rating.

https://www.ti.com/product/DRV8436

Regards,

Ryan

Motor drivers

Motor drivers forum

DRV8845: can this device be used to drive a 36V DC bus stepper motor?