The invention relates to a charger (2), in particular an exhaust gas turbo charger, for a drive device (1) having a compressor (5) that can be electrically supported or driven by a media gap motor (8), wherein the media gap motor (8) has a rotor (9) that is operatively connected to a bearing shaft (7) of a compressor impeller (6) of the compressor (5), and a stator (10) that surrounds at least sections of the rotor (9) in the circumferential direction in relation to an axis of rotation (11) of the bearing shaft (7). In this way, a power electronic system (12) for actuating at least one electrical coil of the stator (10) surrounds at least sections of the axis of rotation (11) in the circumferential direction, wherein a cooling jacket (17), which is in contact with the stator (10) and/or the power electronic system (12), is provided for cooling the stator (10) and/or the power electronic system (12).