MCT8315A: Open loop duty cycle limit

Tool/software:

Hello team,

I am using IPD as start up mode, and speed loop is enabled.

When I reduced the Open loop duty cycle limit [OL_DUTY], the motor sometimes fail to spin normally.
It looks like out of phase and makes huge vibration.

The motor starts up normally every time, when I set Open loop duty cycle limit [OL_DUTY] to 100%.

Is there any way I can solve this motor start up failure, while reducing the Open loop duty cycle limit [OL_DUTY] value?

Best Regards,
kei Kuwahara