The MC33hb Contactor doest not work in HVBMS_RD_IntProj_775_772_S32DS project

[Rexyz]

Hello,

I am working on MC33hb contactor on RD-K344 BMU board. The PWM pin for charger contactor driver is high in the MC33hb demo code. But the PWM pin for charger contactor driver is always low in HVBMS_RD_IntProj_775_772_S32DS.

Could you please tell me the reason??.

 Thanks and regards,

Revathi

[TomasVaverka]

Hello Revathi,

Please see below the extract from our RD-K344BMU User Manual.

The contactor driver is always low in HVBMS_RD_IntProj_775_772_S32DS as this operational state (close) is not fully implemented (so it remains in open state by default). 

We don't integrate the actual contactors in our project, but only gave an idea to enable basic drivers to use the contactor driver IC.

BR, Tomas

[Rexyz]

Hello Tomas,

Thanks for replying.

I have integrated the driver MC33hb in HVBMS_RD_IntProj_775_772_S32DS project and implemented the code but, its not working. The PWM pin is always low. I dont know why.

The same driver code i have tested in the MC33hb demo code and its working.

Thanks and regards,

Revathi