LAUNCHXL-F280025C: Voltage offset around 1.0V ( vs 0.5 expected) ? - on my LAUNCHXL-F280025C + DRV8353RS-EVM , running Universal Motor Control Lab

Hi Anil,

What is the speed observer being used? FAST or eSMO?

Thanks,

Jiaxin

Hi Jiaxin,

MOTOR1_FAST is used.

Regards,

Aniil

Hi Anil,

What is the DC bus voltage now?

Thanks,

Jiaxin

Hi Jiaxin,

Have kept 24V now..

Sorry for the delayed response.

Regards,

Anil

Hi Anil,

No problem. Before plugging in the DRV8353RS-EVM to the LAUNCHXL-F280025C, did you disconnect the J1-17 (IDRIVE) and J1-19 (VDS) on the DRV8353RS-EVM to the launchpad?

Thank you,

Jiaxin

Yes Jiaxin.

Those 2 pins are disconnected..

Regards,

Anil

Hi Anil,

Felt it might be related to the improper setting of the "enable" pin on the DRV device, could you check this thread which has similar issue as you have?

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1043745/drv8353rs-evm-universal-motor-control-lab-correct-offset-values-faults-and-module-overcurrent-faults

Thanks,

Jiaxin