Minimum required magnetising inductance for multiple-output flyback DC–DC convertor in CCM

The derivation of the equation for the minimum value of magnetising inductance needed for the multiple-output flyback DC-DC converter to operate in continuous-conduction mode (CCM) is presented. The equation is derived for two outputs and then generalised for multiple outputs. Two design examples are presented, one for equal output voltages and the other for unequal output voltages. Simulation results are presented in order to verify the derived expressions.