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CCS/TMS320F28027: HVPSFB-PCMC

user4994540
Prodigy 40 points
Part Number: TMS320F28027

Tool/software: Code Composer Studio

Hi.

Referring to the TI phase shifted full bridge blueprint, I made a prototype of myself. Now the problems are as follows:

1.The 12V power supplies power to the control panel. With the TI process, HVPSFB-PCMC program can be downloaded to the F28027 chip, but the fault flag FaultFlg set 1; that is, the input peak current over-current,    but this time there is no high voltage.

2.But it's better to shield this, FaultFlg is 0, and has a PWM waveform.

     // Configure Comparator and DAC for peak current mode operation with internal ramp for slope compensation
              // DacDrvCnf(1, 1280, 1, 2, Slope); // Comp1, DACval = 1280(Initial), Slope compensation is used, Ramp is PWM3 Synced, Initial Slope
        Or you can change the comparator from 2 to 1.
        // Configure Comparator2 and DAC for over current protection
DacDrvCnf(2, Ipri_trip, 0, 2, 0); // Comp2, DACval = Ipri_trip, DAC Source is DACval, Ramp Source = don't care, Slope = don't care
Looking forward to your reply, thank you