Electronic control device and method for reducing stand-by state energy consumption of an electric household appliance

Household appliance (1) comprising a electronic command device (3) configured to reduce standby-state energy consumption of the electric household appliance (1); electronic command device (3) comprising an electronic control unit (20) and a switching mode low power supply unit (6) comprising a switching regulator unit (13) having a first control terminal (11) and at least an output terminal (9) which supplies a main prefixed supply voltage (VB) to the electronic control unit (20); the switching mode low power supply unit (6) being further configured to switch from a standby state to an operating state, when detects a prefixed voltage variation (V) on the first control terminal (11); wherein the switching mode low power supply unit (6) comprises auxiliary supply means (14) which supply a low supply voltage (V1) different to zero to said firs control terminal (11) during at least standby state.