Vref equation for TB67S249FTG?

I'm using TB67S249FTG with a large heatsink and a fast fan so reaching 4.0 amps should be possible.
I'm using this motor and this motor.

[www.aliexpress.com]

I wanted to find the perfect Vref for it with this driver and possibly go a little over the rated 2.1a per phase but I can find the equation for it.

Does anyone have it?

current limit=VREF×1.25 A/V

according to [www.pololu.com]

I'm still new and I'm not sure where can I find the Vref?
Is it stated at the motor specs or the driver?

Quote
RomanTech
I'm still new and I'm not sure where can I find the Vref?
Is it stated at the motor specs or the driver?

Please remove the Tech in your pseudo.

---

"A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)

vref is the measured reference voltage

you use a multi meter and stick it on the modules VREF pin



you may want to watch this [www.youtube.com]

Edited 2 time(s). Last edit at 03/07/2019 05:53AM by Dust.

Sorry man I just use it on every single account I have. It is easier to remember that way. Thank you anyway.

Thanks a lot, I have calculated and got 0.78125.

Just getting ready to install these drivers...but still a question about the Vref....maybe I'm being really dense here....

From the Polulu site: For the TB67S249FTG, current limit = VREF×1.25 AV. So Vref = current limit / (1.25 AV)

Polulu gives an example that calculates out as simply Vref = current limit / 1.25.... the AV term doesn't seem to be in the calculation. So what is that AV term in the equation? That's what I don't get.

Also, Roman Tech....how the heck did you get 0.78???

For your example, I get Vref = 2.1A / 1.25 = 1.68.

What am I missing here?