TRIAC module

A TRIAC module (100) connected to one power line (L1) of two power lines, which are configured to supply a power from a commercial AC power source (AC) to an electrical device (10), to switch the electrical device (10) on and off, the TRIAC module (100) comprising:

• a TRIAC (110) connected to the one power line (L1) of the two power lines configured to supply a current from the commercial AC power source (AC) to the electrical device (10), and operated by a TRIAC driving current input to a gate terminal (g) to regulate power supply of the electrical device (10);
• a bridge diode (120) connected in parallel with the gate terminal (g) and a T2 terminal (T2) of the TRIAC (110), and configured to full-wave rectify a current that is output from the gate terminal (g) of the TRIAC (110) or input to the gate terminal (g) of the TRIAC (110);
• a TRIAC triggering unit (130) connected to the bridge diode (120), and configured to operate the TRIAC (110) by receiving a current (I) output from the bridge diode (120) and outputting the TRIAC driving current (I1) for turning on the TRIAC (110) to the gate terminal (g) of the TRIAC (110);
• and
• a latch circuit unit (140) latched on to output a latch current, which has a smaller value than a threshold current (Ith) at which the TRIAC (110) is driven, to the gate terminal (g) of the TRIAC (110),
• wherein, when the latch circuit unit (140) is latched on, the TRIAC triggering unit (130) cuts off the output of the TRIAC driving current (I1) so that the TRIAC (110) is switched off.