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Jiannong,

I am not sure the DRV8312 is the right part for your application.  If you just want a part to handle the commutation while also giving you speed control, than you can consider a motor controller like below:

http://www.ti.com/lit/ds/symlink/tpic43t01.pdf

You can use external FETs to scale appropriately for your motor current needs.  

What are your voltage/current needs?

Ryan Kehr

Jiannong,

I am not sure the DRV8312 is the right part for your application.  If you just want a part to handle the commutation while also giving you speed control, than you can consider a motor controller like below:

http://www.ti.com/lit/ds/symlink/tpic43t01.pdf

You can use external FETs to scale appropriately for your motor current needs.  

What are your voltage/current needs?

Hi Sir,

Thanks for your information!

I plan to use this DRV8312 chip to drive a brushless DC motor with a speed control, not so accuracy and microcontroller to interface it simplely. We will use PWM to control speed, one GPIO to control move direction.

I want to use other brands 8bit MCU to control. Do you have sample C code for this driver?

thanks,

Jiannong

Hi Ryan Kehr,

I would like to use DRV8321 as I have used DRV8432 driver for brushed DC motor before. It's a simple infterface with MCU. The proformance is good. Is there any additional circuit or ICs of TI to provide a interface bewteen MCU and DRV8321 with simple PWM and direction control?

Voltage/Current in my application: 28V/2.5-3A.

regards,

Jiannong

Jiannong,

Go to the following link to download all the available code for the DRV8312-C2-Kit.  We have an example project that uses trapezoidal control with hall sensor interface.  It is C code that can be ported.

http://www.ti.com/tool/controlsuite

Ryan Kehr,

thank you very much for your information!

regards,

Jiannong