UCC28019 boost coil equation

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If you plot a chart from d=0.1 to d=0.9 compared to d(1-d) you will see that 0.5 is where it peaks. They are simply using the worst case.

Mike.
 
Pommie said:
If you plot a chart from d=0.1 to d=0.9 compared to d(1-d) you will see that 0.5 is where it peaks. They are simply using the worst case.

Mike.
Click to expand...
Thanks pommie for reply, now i get that d*(1-d) is biggest when duty is 0,5. But i still dont know why is there d*(1-d) in eq. instead of just d or (1-d).
 
It symmetrically "shapes" the result to peak at 50% duty; eg. that give 0.25 while eg. 10% and 90% both give 0.09
 
MacIntoshCZ said:
biggest when duty is 0,5. But i still dont know why is there d*(1-d) in eq. instead of just d or (1-d).
Click to expand...
For that "biggest" equation it would be "0.5d". But for all duty cycles it is d*(1-d).
Worse case duty cycle = d/2=0.5d,,,, For any duty cycles d*(d-1)
 
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