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Forum Post: RE: TMS320F280039C: Understanding on SFRA behavior using TIDM buck converter FW with 200kHz HW and 20kHz HW setup

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Hi Sumit, 1.Yes, I confirm that I am running lab-1. I am not getting a plant response (an error has occurred as shown in the figure below, but I have a set of readings recorded in the 'SFRAData' Excel sheet). 2. Yes, I am getting the correct values for Vout (BUCK_vOutSensed_Volts). 3. Yes, the ISR frequency is the same as the switching frequency, as per your image-2. 4. Below is the open-loop response with a '0.01pu' injection amplitude: Test conditions: Vin: 100V, Iin=0.87A Vout=42.6V, Iout=2A (CC mode of DC electronic load) Duty=0.45 Injection Amplitude= 0.01 Sweep Freq. = 10Hz to 180kHz. If anything further require, please let me know. Thanks & Regards, Prathamesh.

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