1. A triac driving circuit comprising:a triac connected between an alternating current source and a load;
a phototriac coupler configured to transmit a signal to the triac;
a first resistive element; and
a second resistive element,
wherein the phototriac coupler, the first resistive element, and the second resistive element are connected in series to a gate terminal of the triac, and
wherein a minimum resistance of the first resistive element including tolerance is higher than the maximum resistance of the second resistive element including tolerance.