Patent ID: 9568932
Date: 2017-02-14
CPC Classifications: G05F,G06F,H02J,Y02B,Y04S

Claim:
1. A method for reducing standby-state energy consumption of an electric household appliance comprising an electronic control unit, and a switching mode low power supply unit which supplies a main prefixed supply voltage (VB) to said electronic control unit; the switching mode low power supply unit comprising at least a first control terminal and at least an output terminal which supplies said main prefixed supply voltage (VB) to said electronic control unit; the switching mode low power supply unit being further configured to switch from an operating state to a standby state when said first control terminal receives a command signal (Soff); said electronic control unit having a sensing terminal and being configured to generate said command signal (Soff) when it detects a predetermined voltage variation on said sensing terminal; the method comprising the step of connecting, at least temporarily, said sensing terminal to said output terminal or to an independent auxiliary terminal having a predetermined voltage to cause the electronic control unit to generate said command signal (Soff) so that said switching mode low power supply unit switches from the operating state to the standby state; wherein said switching mode low power supply unit has a second control terminal and is further configured to switch from the standby state to the operating state, when it detects a prefixed voltage variation (ΔV) on the second control terminal; said method comprising the step of connecting, at least temporarily, said second control terminal to said output terminal, or to an independent auxiliary terminal having a predetermined voltage, to cause said prefixed voltage variation (ΔV) on said second control terminal so that said switching mode low power supply unit switches from said standby state to said operating state.