Patent ID: 8159092

Claim:
An electrical installation or device equipped with a power supply unit comprising a voltage converter having primary and secondary parts respectively defining a primary side and a secondary side of this electrical installation or device, wherein said power supply unit comprises a power management unit arranged on said primary side, the primary part of the converter being associated with a control circuit also arranged on said primary side and controlling the electrical energy flowing in the primary power path of said primary part with a High Voltage, this control circuit receiving from the power management unit at least a first control signal for switching OFF the electrical energy in said primary power path, said power supply unit entering a very low power mode (“Power-down” mode) when said first control signal is set to OFF so that the converter is not supplied with electrical energy anymore, said power management unit being arranged such that, in said very low power mode, the power management unit can receive or generate at least a wake-up signal and set to ON said first control signal in response to said wake-up signal for supplying electrical energy again to said primary and secondary parts of the converter, wherein the power management unit comprises a power supply controller managing several functions of this power management unit, a first voltage reducer or a first output of a voltage reducer unit providing an Intermediate Voltage when receiving an Input Voltage and a second voltage reducer, following said first voltage reducer, or a second output of said voltage reducer unit providing a Low Voltage for supplying said power supply controller.