DRV8718-Q1: Is it possible to use both DRV8718+DRV8714 to drive one motor?

Hello Shinya,

Because the number of motors in customer's project is 12, so customer thought it is a most cost effective way to combine 8718 and 8714 and no half-bridge driver is wasted.

The most important problem is: can we achieve normal diagnosis and protection? From my understanding, we can use programming configuration to realize it. Please help to check whether there is any risk.

Thanks!

Iris,

Please draw out the motor configuration the customer would like to use.  I am not clear on the configuration.

You can draw out on paper and take a picture if that is easier.

Regards,

Ryan

Hi Ryan,

please see the picture as attached.

Iris,

If every motor is connected like this, why would the customer not use 3x DRV8718 to drive 12 motors (4 each with 1x DRV8718).  I understand they would not have current sensing for all motors and would have to use some external current sensing unless they want to use 6x DRV8714.  

I am still not understanding why they would need to share across devices with an even number of motors.  That is my confusion.

Regards,

Ryan

Ryan,

I will check with customer about your question which I am also confused because of the number is 12. But if suppose customer have some reason to evaluate this configuration, do you have any comment about the possibility to use in this way and any concern?

Thanks.