V. CONCLUSION AND OUTLOOK
Phase shifted paralleling of two LLC resonant
converters reduces the current stress in the output filter
capacitor. Reliable operation of two paralleled and phase
shifted LLC resonant converters seems to be possible if
frequency controlled current balancing is applied.
Therefore, component tolerances of the resonant circuit
elements have to be considered in the design procedure.
To demonstrate the functional capability of the current
balancing control, a power supply prototype consisting of
a three stage converter structure has been presented. More
applications can be investigated in the future.