Effect of leakage inductance on steady-state cross-regulation of dual-output LLC resonant converters

摘要

Steady-state cross-regulation is a critical issue for dual-output dc-dc converters. The effect of leakage inductance on steady-state cross-regulation of dual-output LLC resonant converter is analysed in this Letter. It is revealed that a proportional relation between leakage inductance and load resistance of dual-output LLC resonant converter ensures zero steady-state cross-regulation. Furthermore, the variations of steady-state cross-regulation with regards to leakage inductance and load resistance are concluded. Finally, experimental results are provided to verify the theoretical analysis.