Converter circuit having high power in ultra-wide range

Abstract

Disclosed is a converter circuit having high power in an ultra-wide range, which includes a transformer module, a first and second primary input modules, an output module, a high and low voltage mode control module, and a load output module. The first primary input module includes a first primary voltage equalization network, a first switch module and a first LC module, the second primary input module includes a second primary voltage equalization network, a second switch module and a second LC module. The first primary voltage equalization network is connected between a first input capacitor and the second switch module, and the second primary voltage equalization network is connected between a second input capacitor and the first switch module. In this disclosure, it is surprisingly found that through arranging resonant voltage equalization network, a designated primary voltage deviation problem, which is caused by a change of a pulse control of an LLC resonant converter under a light load, is solved.