Control method and control module for AC/DC conversion circuit

The invention discloses a control method and a control module for an AC/DC conversion circuit. The control method comprises: within a first turn-on time when a main switching tube is turned on, detecting whether the inductive current in the AC/DC conversion circuit is greater than a first threshold; if smaller, setting the maximum turn-off time of the main switching tube as T1; if greater, setting the maximum turn-off time of the main switching tube as T2; and counting the number of the maximum turn-off time T2 of the main switching tube, wherein when the number reaches N, the AC/DC conversion circuit enters a short-circuit protection state. The control method and the control module can ensure high system starting speed and ensure low output current when the system is short-circuited, so that the reliability of the system is high and the contradiction between starting and short-circuiting is well solved.