LLC LLC RESONANT CONVERTER AND OPERATION METHOD THEREOF

摘要

This embodiment is an LLC resonant converter including a primary side circuit for converting a DC input voltage Vin to an AC voltage of a predetermined level and a secondary side circuit for rectifying the converted AC voltage to supply a DC output voltage Vo. The method of claim 1, wherein the primary circuit includes: a first resonant circuit unit including a transformer T1, a resonant inductor Lpl1 and a resonant capacitor Cr1; A second resonant circuit unit including a transformer T2, a resonant inductor Lpl2, and a resonant capacitor Cr2; And a plurality of switching elements that convert the DC input voltage Vin to an AC voltage through a switching operation and apply it to the first resonant circuit unit and the second resonant circuit unit, wherein the secondary-side circuit includes the transformer T1 and the transformer T2 It includes a rectifying unit including a plurality of diodes that are connected to the secondary coil of the rectifying the AC voltage converted by the primary circuit, the resonance capacitor Cr1 and the resonance capacitor Cr2 is the tolerance of the resonance element (Tolerance) In order to prevent the current imbalance of the secondary-side circuit, an LLC resonant converter having one end and the other end in common connection is provided.