B-type leakage protection circuit, integrated circuit chip thereof and B-type leakage protector

The invention discloses a B-type electric leakage protection circuit, an integrated circuit chip thereof and a B-type electric leakage protector, and the electric leakage protection circuit comprises an electric leakage sampling module U1 which is provided with a magnetic ring coil; the current amplification circuit module U2 outputs oscillating current with an adjustable duty ratio, and the duty ratio is modulated by the coil L1 and a leakage current difference value induced by the coil L1; the temperature compensation module U4 comprises a temperature compensation filter circuit, a temperature compensation generation circuit and a digital voltage source module DAC; the input end of the comparison circuit module U5 is connected with the output end of the current amplification circuit module U2 and the output end out of the digital voltage source module DAC, and when the leakage current difference value exceeds a preset value, control voltage is output; and the input end of the driving circuit module P is con