CCS/TIDA-00872: How to realize locked-rotor detection when DRV8711 is used for unipolar stepper motor control?

user6418426

Part Number: TIDA-00872
Other Parts Discussed in Thread: DRV8711, , DRV8805

Tool/software: Code Composer Studio

Don’t know if it’s my circuit problem? Or is it a software configuration problem? Please also help!

When DRV8711 is used in a unipolar stepper motor, can the locked-rotor detection function be realized? Is there an alternative?

The above is the reference TIDA-00872 circuit.

The above is the DRV8711 register configuration

0 user6418426 over 5 years ago

Supplementary note: Motor voltage 12V, measured total current 150mA, measured motor single-phase current 50mA, pulse frequency 200Hz

0 Ryan Kehr over 5 years ago in reply to user6418426

Thank you for your post!

I will need to investigate this further. Please expect a response by 09/08/2020 (US business time).

0 Ryan Kehr over 5 years ago in reply to user6418426

Hello,

I checked the application note in detail and in section 1.1, please see the following note:

"The stall detection feature is also disabled for this application. Stalls will be indicated, but the information is not valid."

Have you considered using a more integrated device that would easily handle your current requirements like the DRV8805?

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