A synchronous rectifier circuit can include: a full-bridge rectifier circuit having first, second, third, and fourth switches, where a common node of the first and fourth switches is configured as a first input terminal of the synchronous rectifier circuit, and a common node of the second and third switches is configured as a second input terminal of the synchronous rectifier circuit; a switching control circuit configured to generate a first control signal to control the first and third switches, and a second control signal to control the second and fourth switches; and the switching control circuit being configured to self-adjust the first and second control signals to control operating points of the first, second, third, and fourth switches to be approximately ideal operating points.