TIDM-02009: DF22 control loop parameters

Hi,

I'm trying to understand how DF22 parameters are calculated and also what is the used crossover frequency and gain margin.

Outer loop parameters are as below;

//
// Voltage loop control coefficients
//
#define PSFB_GV_DF22_B0   (0.0076029f * 600.0f)
#define PSFB_GV_DF22_B1   (-0.0133437f * 600.0f)
#define PSFB_GV_DF22_B2   (0.0058360f * 600.0f)
#define PSFB_GV_DF22_A1   (-1.6827997f)
#define PSFB_GV_DF22_A2   (0.6827997f)

1) Could you please provide formula to obtain crossover frequency of compensator depending on above parameters and design?

2) Could you please provide formula to obtain gain and phase margin depending on above parameters and design?

Thanks in advance.