METHOD FOR CONTROLLING LOGICAL LINK CONTROL RESONANT CONVERTER, METHOD FOR CONTROLLING SYNCHRONOUS RECTIFICATION AND DEVICES THEREOF

摘要

A method for controlling a logical link control (LLC) resonant converter, a method for controlling synchronous rectification and devices thereof are disclosed in the present invention. The method for controlling an LLC resonant converter includes: judging whether the load is working in a predetermined state according to an input switching tube switch-on frequency of the LLC resonant circuit; if yes, enabling the LLC resonant circuit to work in a width modulation control mode, otherwise, enabling the LLC resonant circuit to work in a frequency modulation control mode, wherein the predetermined state includes a light load state or a no-load state. The present invention enables voltage stabilization under the condition that the LLC resonant circuit is light load or no-load, reduces loss of the circuit, simplifies the peripheral hardware circuit effectively, and can be implemented more reliably than the existing technical solutions.