TIDM-DC-DC-BUCK: upper switch missing pulses

Hi,

Can you share how you configure ePWM modules especially the dead band configuration?

Thanks for the reply. deadband module is not configured at all for this ePWM module.

I guess using the deadband module is the convenient way to generate complementary switching. How do you implement complementary switching on your system? This can help figure out the root cause.

Best,

John

Hi, John,

Thanks for looking into this, I set up the action for outputB and outputA individually as following:

//This is to set turn on of outputB, outputA is complimentary 

EPWM_setActionQualifierAction(BOOST_DRV_EPWM_BASE,EPWM_AQ_OUTPUT_B,EPWM_AQ_OUTPUT_HIGH,EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
 EPWM_setActionQualifierAction(BOOST_DRV_EPWM_BASE,EPWM_AQ_OUTPUT_A,EPWM_AQ_OUTPUT_LOW,EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

//this is to set turn off of output B, outputA is complimentary
EPWM_setActionQualifierAction(BOOST_DRV_EPWM_BASE,EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_HIGH,EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
EPWM_setActionQualifierAction(BOOST_DRV_EPWM_BASE,EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_LOW,EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);