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Calculation: Flyback Converter

Enter Opearting Conditions
Vin [V_DC]: Np: Ns: Vout [V_DC]: Iout [A_DC]:
fsw [Hz]: N1 [Q1 // FETs]:

Enter Thermal Parameters
TA [°C]: RthCA_Q1 [°C/W]: TempCoeff [Rdson-TC Default]:

Enter Gate Driver Parameters
Vgdrive [V]: Rg_Ext [Ω]: Rpu [Ω]: Rpd [Ω]:

Enter Diode Parameters
VF_D1 [V]: Qrr_D1 [C]:

Enter Transformer Parameters
Lp [H]: DCRp [Ω]: DCRs [Ω]: Kh [Constant]: B_TF [Tesla]:
x [Exponent]: fs [Hz]: A_core_TF [m²]: L_core_TF [m]: Ke [Constant]:
t_core_TF [m]:

Other Circuit Parameters
Cin [F]: ESRin [Ω]: Cout [F]: ESRout [Ω]:


Select Your Power Devices
Use parametric data from datasheet tables        Add measurement data from datasheet graphs

Select Mosfet Part [Q1]

Material Qualification
RDSON [Ohm] - Mounting
VDS [V] Package Area [mm2] -



   OR   

Note: Configuration, VDS [V], RDSon [mOhm] (Typ/Max), Vth_Max [V], Vgp_Typ [V]


Converter Steady State Waveforms (assuming ideal switches)


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  • STEP-1
  • STEP-2



Loading.. Iin, ICin Vs. Time
Iin_RMS = 1.882 A
ICin_RMS = 1.570 A


Loading.. Vp, Vs, Vin, Vout Vs. Time


Loading.. Q1_Parameters Vs. Time
Q1_VDS_RMS = 127.825 V
Q1_IDS_RMS = 1.883 A


Loading.. PowerLoss Vs. Time