A power supplying apparatus comprising: a bus; a plurality of USB ports (112, 122, 132) corresponding to a USB (Universal Serial Bus) PD (Power Delivery) standard, wherein the plurality of USB ports (112, 122, 132) consist of two or more USB ports, a plurality of electric power supplying circuits (111, 121, 131) provided corresponding to the USB ports (112, 122, 132), for supplying power to power receiving devices (10, 20, 30) coupled to the USB ports (112, 122, 132), and a plurality of controllers (110, 120, 130) each connected with the bus and a corresponding one of the plurality of USB ports (112, 122, 132), for holding a power profile representing one or more power receiving capabilities of each corresponding power receiving device (10, 20, 30), wherein each of the plurality of controllers (110, 120, 130) each controls a corresponding one of the plurality of electric power supplying circuits (111, 121, 131), wherein one of the plurality of controllers (110, 120, 130) serves as a master controller and the remaining one or more of the plurality of controllers (110, 120, 130) serve as one or more slave controllers (120, 130), wherein the master controller is adapted to generate a power profile table by listing the power profile of the power receiving device connected to its corresponding USB port and the power profile or profiles, transmitted via the bus by the one or more slave controllers (120, 130), of the power receiving device or devices (20, 30) connected to its or their corresponding USB port or ports (122, 132), wherein the master controller is adapted to determine a power distribution based on the power profile table, by selecting a power receiving capability, among the one or more power receiving capabilities, of each of the power receiving devices (10, 20, 30) in such a manner that a total supply power, being a sum of powers corresponding to the selected power receiving capabilities, supplied from the plurality of the electric power supplying circuits (111, 121, 131) does not exceed a prescribed value, and wherein the master controller controls power to be supplied from the corresponding electric power supplying circuit in accordance with the determined power distribution, and wherein the master controller outputs one or more arbitration signals corresponding to the determined power distribution for the corresponding one or more slave controllers (120, 130), the one or more slave controllers (120, 130) controlling power to be supplied to the corresponding one or more USB ports (122, 132) in response to the corresponding one or more arbitration signals. a bus; a plurality of USB ports (112, 122, 132) corresponding to a USB (Universal Serial Bus) PD (Power Delivery) standard, wherein the plurality of USB ports (112, 122, 132) consist of two or more USB ports, a plurality of electric power supplying circuits (111, 121, 131) provided corresponding to the USB ports (112, 122, 132), for supplying power to power receiving devices (10, 20, 30) coupled to the USB ports (112, 122, 132), and a plurality of controllers (110, 120, 130) each connected with the bus and a corresponding one of the plurality of USB ports (112, 122, 132), for holding a power profile representing one or more power receiving capabilities of each corresponding power receiving device (10, 20, 30), wherein each of the plurality of controllers (110, 120, 130) each controls a corresponding one of the plurality of electric power supplying circuits (111, 121, 131), wherein one of the plurality of controllers (110, 120, 130) serves as a master controller and the remaining one or more of the plurality of controllers (110, 120, 130) serve as one or more slave controllers (120, 130), wherein the master controller is adapted to generate a power profile table by listing the power profile of the power receiving device connected to its corresponding USB port and the power profile or profiles, transmitted via the bus by the one or more slave controllers (120, 130), of the power receiving device or devices (20, 30) connected to its or their corresponding USB port or ports (122, 132), wherein the master controller is adapted to determine a power distribution based on the power profile table, by selecting a power receiving capability, among the one or more power receiving capabilities, of each of the power receiving devices (10, 20, 30) in such a manner that a total supply power, being a sum of powers corresponding to the selected power receiving capabilities, supplied from the plurality of the electric power supplying circuits (111, 121, 131) does not exceed a prescribed value, and wherein the master controller controls power to be supplied from the corresponding electric power supplying circuit in accordance with the determined power distribution, and wherein the master controller outputs one or more arbitration signals corresponding to the determined power distribution for the corresponding one or more slave controllers (120, 130), the one or more slave controllers (120, 130) controlling power to be supplied to the corresponding one or more USB ports (122, 132) in response to the corresponding one or more arbitration signals.