Automatic interleaving control for paralleled converter system and its ripple estimation with simplified circuit model

Ripple estimation for paralleled converter system with automatic interleaving control is presented. Current ripple in output capacitor of multi-phase converter is estimated through a simplified circuit model which is available for any paralleled converter system under ideal out-of-phase operation. Relationships between the ripple and circuit parameters such as duty ratio, inductor and number of modules are revealed clearly which lead a simple design guideline for ripple-minimized paralleled converter system.