The winding 1102 is connected to an interconnection node 123, to which component 116 is also connected, i.e. node 123 is an interconnection node between winding 1102 and component 116.

In the present embodiment, the winding 1102 is connected between node 118 and node 123, the component 116 is connected between node 123 and node 122. In this example, where component 116 is a diode, diode 116 has its anode coupled, preferably connected, to node 123 and a cathode coupled, preferably connected, to node 122. In FIG. 2, the phase points of windings 1101 and 1102 are represented; the phase point of winding 1101 is, for example, on the side of node 106, and the phase point of winding 1102 is, for example, on the side of node 118.

Interface 214 comprises a capacitor CT connected between nodes 122 and 118. Interface 214 comprises at least one communication terminal. The output terminals 120 and 124 and the communication terminals are all intended to be coupled to the USB connector 212 (not shown), which then allows the coupling with the device 400, for example, via the connector C1, the cable C and the connector C2, as shown in FIG. 1. When device 400 is coupled to interface 214, and switch 114 is closed, device 400 is powered by the voltage Vbus.