Single Transistor Forward Converter

  Vin_min / V Vin_max / V  
Vin / V for the calculations
  Vout / V Iout / A   f / kHz    
  L / H ΔIL / A for Vin_max  
N1 / N2 :   
The values of all input fields can be changed.
The proposed value for L is chosen so that ΔIL=0,4·Iout for >Vin_max.
The proposed value for N1/N2 is chosen such that Vout is just achieved when Vin= Vin_min.
This volume is chosen such that the transformer temperature-rise, during operation is under 30K and the coil with a current density S = 3A/mm2 fits into the available winding area.
The wire cross sections are always suggested for a current density of 3A/mm2
Tip: Its best not to modify N1/N2 ;-)

By Dr. Heinz Schmidt-Walter, Holger Wenzel, Thomas Zänker, Richard Morgan and Johnalan Kegan.