Method for synchronous rectification of a dc-to-dc converter

A method for synchronous rectification of an LLC converter circuit, the LLC converter circuit comprising a primary side switching component and a synchronous rectifier, the method comprising:

• generating, by a controller coupled to the LLC converter circuit, a secondary side driving signal to the synchronous rectifier using a current signal of a shunt resistor connected to the synchronous rectifier;
• and
• driving the synchronous rectifier by the generated secondary side driving signal.

A controller for controlling synchronous rectification of a full bridge LLC converter circuit, the LLC converter circuit comprising a primary side switching component and a synchronous rectifier including a first synchronous rectifier switch and a second synchronous rectifier switch, the controller comprising:

• control logic including a first AND gate and a second AND gate,
• wherein the first AND gate receives as inputs a first current signal of a first shunt resistor connected to the first synchronous rectifier switch of the synchronous rectifier and a first driving signal of the primary side switching component and generates as a first output signal, a first secondary side driving signal to drive the first synchronous rectifier switch of the synchronous rectifier, and
• wherein the second AND gate receives as inputs a second current signal of a second shunt resistor connected to the second synchronous rectifier switch of the synchronous rectifier and a second driving signal of the primary side switching component and generates as a second output signal, a second secondary side driving signal to drive the second synchronous rectifier switch of the synchronous rectifier.