DRV8711EVM Power Supply

Hi Jansen

The voltage and current specs of the power supply will be directly determined by the stepper motor you are using.

The EVM VM voltage input is recommended from 12V to 48V.

Note the RMS currents between motor phase and power supply are different usually because of the PWM driving. The following equation gives a rough approximate value.

V_supply * I_supply = 2 * I_RMS_motor^2 * R_motor

After you get the I_supply by above equation, you can give a 1.5x to 2x margin for the selection.

Thanks.

Hi Jansen

Still you need to select your VM. Normally you can use 24V VM. I give a example of 24V as following.

24 * I_supply = 2* 2.13 * 5.6A

So I_supply should > 1A.

Let give enough margin as a 2A or 3A power supply. 3A is preferred.

Thanks.