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TMS320F280049: SFRA Setting

Part Number: TMS320F280049
Other Parts Discussed in Thread: SFRA, TIDM-DC-DC-BUCK

Hello,

I'm trying to implement SFRA on my power supply. It says in the documentation that the SFRA uses per unit values. So do I have to divide my reference voltage and output voltage reading by 4096 (12-bit ADC) before applying the inject and collect functions? Also, if I use fixed point in my control calculations, then I cannot use floating point in the SFRA function?

Thanks

  • Ahmed,

    Yes we only support the floating point version on F280049 as the device itself is floating point. you will need to divide the adc reading by 4096. 

    There is no advantage to do the control in fixed point,

    Please refer to the examples in the SDK to understand the usage. A good example is TIDM-DC-DC-BUCK