Does SFRA work on any converter design or only on TI reference boards?

Thanks Hrishi, sorry for my question but I am new to this tool. DO you know, if I need to create a stand alone CCS project to run the SFRA tool? or can I merge the SFRA code provided in the guide SPRUHZ5A in my current project code?

Thanks so much

Leo

Leo,

Please follow the SFRA library documentation to correctly add SFRA code to your project. You should be able to use the SFRA GUI with your project.

Hrishi

Hello Hrishi,

Thanks for your answer. So I need to add the lines of code I found in the guide SPRUHZ5A inside my code ISR routine? i.e. from SPRUHZ5A

(b) Using SFRA in open loop to get plant(H) frequency response:

            interrupt void PWM_ISR(void)

            {

            ....

            //Read ADC and computer Fbk Value

            Vout1_Read = (float32)Vout1R/(4096.0);

             //Add SFRA injection into the duty cycle for the open loop converter

             Duty_pu=SFRA_F_INJECT(Duty_pu_DC);

             //Update PWM value

             EPwm1Regs.CMPA.half.CMPA=((long)(BUCK_PWM_PERIOD))* Duty_pu;

             SFRA_F_COLLECT(&Duty_pu,&Vout1_Read);

             .....

What I need to understand is what the function below does:

EPwm1Regs.CMPA.half.CMPA=((long)(BUCK_PWM_PERIOD))* Duty_pu;

SFRA_F_COLLECT(&Duty_pu,&Vout1_Read);

Thanks for your help again,

Leo