A rectifying control module configured to control a bridge rectifying unit to rectify an AC power source (Vin) into a DC power source (Vo), the rectifying control module comprising: a phase control unit comprising a live wire switch coupled to a live wire and a ground wire switch coupled to a ground wire, and the live wire and the ground wire configured to receive the AC power source (Vin), a low-side drive unit coupled to the live wire switch, the ground wire switch, and connectable to the bridge rectifying unit, a self-drive unit coupled to the low-side drive unit and connectable to the bridge rectifying unit, a current detection unit connectable to the AC power source (Vin) and configured to detect an input current (Iin) of said AC power source, wherein the live wire switch is configured to be turned on by a positive half cycle of the AC power source (Vin) and to provide a live wire signal (Sl), and wherein the ground wire switch is configured to be turned on by a negative half cycle of the AC power source (Vin) and to provide a ground wire signal (Sn); the low-side drive unit is configured to provide a low-side control signal (S3,S4) according to the live wire signal (Sl) and the ground wire signal (Sn), and provide the low-side control signal (S3,S4) to control the bridge rectifying unit; the self-drive unit is configured to establish a drive voltage according to the AC power source (Vin), provide a high-side control signal (S1,S2) according to the low-side control signal (S3,S4), and provide the drive voltage and the high-side control signal (S1,S2) to control the bridge rectifying unit; characterized in that the rectifying control module further comprises: a turned-off control unit coupled to the current detection unit and configured to determine whether the bridge rectifying unit is in a light-loading condition according to the input current (Iin) of the AC power source (Vin), and when the bridge rectifying unit is in the light-loading condition, the turned-off control unit is configured to control the low-side drive unit to be grounded so that the bridge rectifying unit is configured to passively rectify the AC power source (Vin) into the DC power source (Vo). a phase control unit comprising a live wire switch coupled to a live wire and a ground wire switch coupled to a ground wire, and the live wire and the ground wire configured to receive the AC power source (Vin), a low-side drive unit coupled to the live wire switch, the ground wire switch, and connectable to the bridge rectifying unit, a self-drive unit coupled to the low-side drive unit and connectable to the bridge rectifying unit, a current detection unit connectable to the AC power source (Vin) and configured to detect an input current (Iin) of said AC power source, wherein the live wire switch is configured to be turned on by a positive half cycle of the AC power source (Vin) and to provide a live wire signal (Sl), and wherein the ground wire switch is configured to be turned on by a negative half cycle of the AC power source (Vin) and to provide a ground wire signal (Sn); the low-side drive unit is configured to provide a low-side control signal (S3,S4) according to the live wire signal (Sl) and the ground wire signal (Sn), and provide the low-side control signal (S3,S4) to control the bridge rectifying unit; the self-drive unit is configured to establish a drive voltage according to the AC power source (Vin), provide a high-side control signal (S1,S2) according to the low-side control signal (S3,S4), and provide the drive voltage and the high-side control signal (S1,S2) to control the bridge rectifying unit; characterized in that the rectifying control module further comprises: a turned-off control unit coupled to the current detection unit and configured to determine whether the bridge rectifying unit is in a light-loading condition according to the input current (Iin) of the AC power source (Vin), and when the bridge rectifying unit is in the light-loading condition, the turned-off control unit is configured to control the low-side drive unit to be grounded so that the bridge rectifying unit is configured to passively rectify the AC power source (Vin) into the DC power source (Vo).