An isolated boost power converter comprising: - a magnetically permeable multi-legged core comprising first and second outer legs (132, 136) and a center leg having an air gap arranged therein, - an input terminal for receipt of an input voltage, V in, - a boost inductor being wound around the center leg or the first and second outer legs (132, 136) of the magnetically permeable multi-legged core, - the boost inductor (L boost) being electrically coupled between the input terminal and a driver to be alternatingly charged and discharged with magnetic energy, - the driver having a driver output coupled to a primary transformer winding (PW 1, PW 2) wound around the first and second outer legs (132, 136) of the magnetically permeable transformer core, - the driver being configured to apply a primary voltage to the primary transformer winding (PW 1, PW 2) in accordance with a driver control signal, characterised in that the isolated boost power converter further comprising: - first and second series connected secondary transformer windings (SW 1, SW 2) with a center-tap arranged in-between and wound around the first and second outer legs, respectively, of the magnetically permeable multi-legged core, - a rectification circuit electrically coupled to respective outputs of the first and second secondary transformer windings to provide a rectified converter output voltage, V out; wherein - in a first discharge state, the magnetic energy stored in the boost inductor (L boost) is discharged by directing a discharge current from the boost inductor (L boost) through the primary transformer winding, - in a second discharge state, the magnetic energy stored in the boost inductor (L boost) is discharged by discharging a magnetic flux through the first and second secondary transformer windings (SW 1, SW 2). - a magnetically permeable multi-legged core comprising first and second outer legs (132, 136) and a center leg having an air gap arranged therein, - an input terminal for receipt of an input voltage, V in, - a boost inductor being wound around the center leg or the first and second outer legs (132, 136) of the magnetically permeable multi-legged core, - the boost inductor (L boost) being electrically coupled between the input terminal and a driver to be alternatingly charged and discharged with magnetic energy, - the driver having a driver output coupled to a primary transformer winding (PW 1, PW 2) wound around the first and second outer legs (132, 136) of the magnetically permeable transformer core, - the driver being configured to apply a primary voltage to the primary transformer winding (PW 1, PW 2) in accordance with a driver control signal, - first and second series connected secondary transformer windings (SW 1, SW 2) with a center-tap arranged in-between and wound around the first and second outer legs, respectively, of the magnetically permeable multi-legged core, - a rectification circuit electrically coupled to respective outputs of the first and second secondary transformer windings to provide a rectified converter output voltage, V out; wherein - in a first discharge state, the magnetic energy stored in the boost inductor (L boost) is discharged by directing a discharge current from the boost inductor (L boost) through the primary transformer winding, - in a second discharge state, the magnetic energy stored in the boost inductor (L boost) is discharged by discharging a magnetic flux through the first and second secondary transformer windings (SW 1, SW 2).