Part Number:LM3481
We are referring LM3481 application note for designing Non-Isolated Fly-back converter. For that we are going through the design formulas given in application note.
In the application note of LM3481, there is one equation to calculate Primary Inductance Lm in page 5, and a graph is given to choose the primary inductance value with respect to Vin in page 10. We tried to calculate primary inductance with equation in page 5 which is not matching with the graph. Example specifications are given in page 9 , with these specifications the calculated primary inductance is not matching with graph or selected Lm=12uH
Please let us know how the graph has been achieved for the range of input voltage specifications given in section 4 (page 9) of application note.
We are trying to design Fly-back converter with below specifications
Vin(min)=3.16V
Vin(max)=25.66V
Vout=12V
Iout=1.556A
Fsw=100KHz
Turns ratio=1
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