Integrated circuit for realizing zero power consumption standby, of switching power supply

A zero-power-consumption controller comprising a charge coupled circuit, a zero-power-consumption microprocessor, and a zero-power-consumption voltage regulation circuit, wherein the charge coupled circuit comprises a first capacitor and a third capacitor, the zero-power-consumption voltage regulation circuit comprises two pairs of MOS transistors, a zero-power-consumption voltage regulator, and a source of reference voltage, wherein the first pair of MOS transistors comprises a first MOS transistor and a third MOS transistor, the second pair of MOS transistors comprises a second MOS transistor and a fourth MOS transistor, a first terminal of an AC power source is connected with a junction between the first MOS transistor and the third MOS transistor in the zero-power-consumption voltage regulation circuit via the first capacitor, a junction between the second MOS transistor and the fourth MOS transistor is floated, a second terminal of the AC power source is connected with a ground terminal of the zero-power-consumption controller via the third capacitor, the third capacitor is connected sequentially to a diode and a Vdd winding of a transformer of the switching power supply, and an input from the AC power source is sequentially fed into the zero-power-consumption voltage regulation circuit and the zero-power-consumption microprocessor via the charge coupled circuit.