A power supply of an electronic apparatus, the power supply comprising: a switching circuit configured to convert a DC voltage into a predetermined operating voltage and a standby voltage; an output controller configured to control the switching circuit in order to supply the operating voltage and the standby voltage to the electronic apparatus; a rectifier configured to rectify an alternating current power input as input power, into a direct current; a power factor correction circuit configured to correct a power factor of a DC voltage converted by the rectifier, characterized in that: the switching circuit comprises a first converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined standby voltage and supplies the DC voltage to the electronic apparatus, a second converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined normal operating voltage and supplies the DC voltage to the electronic apparatus, and a switching module which is connected to an input terminal of the first and second converters (151, 165) and switches a current flow into a primary coil of the first and second converters (151, 165); the output controller is configured to control the switching module of the switching circuit by receiving feedback voltages (V f1, V f2) provided by the first and second converters (151, 165); and the switching module comprises a first switching element and a second switching element configured to be alternately turned on and off by a control of the output controller based on the feedback voltages (V f1, V f2), whereby the predetermined standby voltage and the predetermined normal operating voltage are output by the first and second converter (151, 165) respectively. a switching circuit configured to convert a DC voltage into a predetermined operating voltage and a standby voltage; an output controller configured to control the switching circuit in order to supply the operating voltage and the standby voltage to the electronic apparatus; a rectifier configured to rectify an alternating current power input as input power, into a direct current; a power factor correction circuit configured to correct a power factor of a DC voltage converted by the rectifier, characterized in that: the switching circuit comprises a first converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined standby voltage and supplies the DC voltage to the electronic apparatus, a second converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined normal operating voltage and supplies the DC voltage to the electronic apparatus, and a switching module which is connected to an input terminal of the first and second converters (151, 165) and switches a current flow into a primary coil of the first and second converters (151, 165); the output controller is configured to control the switching module of the switching circuit by receiving feedback voltages (V f1, V f2) provided by the first and second converters (151, 165); and the switching module comprises a first switching element and a second switching element configured to be alternately turned on and off by a control of the output controller based on the feedback voltages (V f1, V f2), whereby the predetermined standby voltage and the predetermined normal operating voltage are output by the first and second converter (151, 165) respectively. the switching circuit comprises a first converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined standby voltage and supplies the DC voltage to the electronic apparatus, a second converter configured to convert the DC voltage output by the PFC circuit into a level of the predetermined normal operating voltage and supplies the DC voltage to the electronic apparatus, and a switching module which is connected to an input terminal of the first and second converters (151, 165) and switches a current flow into a primary coil of the first and second converters (151, 165); the output controller is configured to control the switching module of the switching circuit by receiving feedback voltages (V f1, V f2) provided by the first and second converters (151, 165); and the switching module comprises a first switching element and a second switching element configured to be alternately turned on and off by a control of the output controller based on the feedback voltages (V f1, V f2), whereby the predetermined standby voltage and the predetermined normal operating voltage are output by the first and second converter (151, 165) respectively.