A switching power supply system which comprises; - a first power supply comprising; o a first transformer for stepping up and/or down an output voltage of the first power supply; o a first switching means connected to said first transformer for driving said first transformer; o a first controlling means with power factor correction connected to said first switching means for controlling the switching operation of the switching means; - at least one second power supply comprising; ∘ a second transformer for stepping up and/or down output voltage of the second power supply; ∘ a second switching means connected to said second transformer for driving said second transformer; ∘ a second controlling means connected to said second switching means for controlling the switching operation of the switching means; characterized in that the second controlling means are without power factor correction and in that said power supply system further comprises; - At least one auxiliary winding (T1a) on the first transformer for generating a higher voltage than an input voltage of a power input of the power supply system; - A first rectification means connected between the power input of the power supply system and a power input of the second power supply, allowing a first current to only pass from the power input of the power supply system to the power input of the second power supply and - A second rectification means connected between an output of the auxiliary winding (T1a) and the power input of the second power supply, allowing current to pass only from the output of the auxiliary winding (T1 a) to the power input of the second power supply wherein, the second rectification means is configured to supply the second power supply from the auxiliary winding (T1a) when the first power supply is in operation; and the first rectification means is configured to supply the second power supply from the power input of the power supply system when the first power supply is not in operation. - a first power supply comprising; o a first transformer for stepping up and/or down an output voltage of the first power supply; o a first switching means connected to said first transformer for driving said first transformer; o a first controlling means with power factor correction connected to said first switching means for controlling the switching operation of the switching means; o a first transformer for stepping up and/or down an output voltage of the first power supply; o a first switching means connected to said first transformer for driving said first transformer; o a first controlling means with power factor correction connected to said first switching means for controlling the switching operation of the switching means; - at least one second power supply comprising; ∘ a second transformer for stepping up and/or down output voltage of the second power supply; ∘ a second switching means connected to said second transformer for driving said second transformer; ∘ a second controlling means connected to said second switching means for controlling the switching operation of the switching means; ∘ a second transformer for stepping up and/or down output voltage of the second power supply; ∘ a second switching means connected to said second transformer for driving said second transformer; ∘ a second controlling means connected to said second switching means for controlling the switching operation of the switching means; - At least one auxiliary winding (T1a) on the first transformer for generating a higher voltage than an input voltage of a power input of the power supply system; - A first rectification means connected between the power input of the power supply system and a power input of the second power supply, allowing a first current to only pass from the power input of the power supply system to the power input of the second power supply and - A second rectification means connected between an output of the auxiliary winding (T1a) and the power input of the second power supply, allowing current to pass only from the output of the auxiliary winding (T1 a) to the power input of the second power supply