Driver arrangement for powering a load

A driver arrangement comprising:

• a power factor correction, PFC, converter comprising an input interface and a first output interface, the power factor correction converter being adapted to:
• receive an AC mains power at the input interface;
• convert the AC mains power into a PFC output signal, the PFC output signal having a ripple corresponding to the AC mains power;
• and
• provide the PFC output signal at the first output interface;
• a switched-mode power supply comprising a second output interface connected in series with the first output interface, wherein the switched-mode power supply is configured to generate an offset signal in series with the PFC output signal so as to superimpose the offset signal with the PFC output signal, to compensate for the ripple corresponding to the AC mains power, thereby producing a load powering signal;
• a control circuit configured to:
• sense a first output signal responsive to the voltage of one of the offset signal and the load powering signal, wherein the control circuit is configured to, as a positive feedback loop, control the power factor correction converter to increase the PFC output signal responsive to the voltage of one of the offset signal and voltage of the load powering signal increasing as indicated by the first output signal;
• and
• sense a second output signal responsive to the voltage of one of the PFC output signal, the offset signal and the load powering signal, wherein the control circuit is configured to override the positive feedback loop and enter a protection mode to control the power factor correction converter to restrict the power of the PFC output signal responsive to the second output signal being at and/or going above a predetermined threshold value.