Patent ID: 8014173

Claim:
A resonant converter for improving synchronous rectification control, wherein the resonant converter is connected to a power source for obtaining an input power, and through conduction and cutoff of a switch unit, the period of the input power to be transmitted to a resonant circuit is modified, the resonant converter further comprising: two transformers, electrically connected to the resonant circuit, wherein the input power modified by the resonant circuit is obtained by the primary sides of two transformers, and two induced power with opposite phases are respectively produced at the secondary sides; two synchronous controllers, electrically connected to the primary sides of two transformers respectively, wherein through sensing the polar variation of the voltage from the transformers, the two synchronous controllers individually provide a synchronous driving signal; and two synchronous rectifiers, electrically connected to the secondary sides of two transformers, wherein two synchronous rectifiers are respectively driven by the different synchronous driving signals respectively produced by two synchronous controllers, so as to alternatively conduct the power to an output terminal.