Switched-mode power supply

A switched-mode power supply for the controlled supply of an electrical load from an input source of optionally different voltage types and voltage levels, the switched mode power supply comprising a primary switched-mode flyback converter, said flyback converter comprising:

• a transformer, having a primary and a secondary winding;
• a first controllable semiconductor switching device, having a main current path and a base;
• a first resistor;
• and
• a diode,
• said power supply further comprising a circuit arrangement for limiting during a flyback phase of operation a maximum current of the first controllable semiconductor switching device in dependence upon an output current in the secondary winding, said circuit arrangement connected to the first controllable switching device, and wherein the primary winding, the main current path of the first controllable semiconductor switching device, and the first resistor are connected in a first series arrangement, the first series arrangement being connected during operation in parallel with the input voltage source, and wherein the secondary winding and the diode are connected in a second series arrangment, the second series arrangement being connected during operation in series with the load, and wherein the circuit arrangement detects during the flyback phase a voltage drop along the internal impedance of the secondary winding caused by the output current.