L6235Q control motor mode

[JIE]

I use L6235Q to control the Maxon small DC brushless motor with Hall, and now I have the following issues:
1. Can we achieve sinusoidal signal control of motor rotation. I want to control the motor to rotate forward for 3 turns and then reverse for another 3 turns. I am using the FEW control port for PWM wave generation and SPWM wave input to L6235Q. Unable to implement. The circuit diagram is as follows. (Refer to document DT0001, using PWM control, the motor will shake at 50% duty cycle.)
2. If I cannot use SPWM waves for control, how should I implement my functions?
I hope to receive your help, thank you very much!

 

[JIE]

Is it related to the starting time of the motor? Can someone help me or give me some advice

[Cristiana SCARAMEL]

Hello @JIE and welcome to the ST Community.

The L6235 cannot be used to perform a sinusoidal control, you need all input lines available as in the L6230 or STSPIN830 (according to your application requirements).