An electronic charger for installations with voltages higher than 1 kV AC and 1.5 kV DC up to some tens of kV, comprising: - input terminals (21, 22), which are electrically connectable to an electric power supply; - output terminals (23, 24), which are electrically connectable to an electric load to be charged; - a DC/DC converter of SEPIC type comprising: - an input stage electrically connected with said input terminals and comprising an input inductor, which is configured to store electric energy provided by said power supply, and a switching device, which is configured to control a charging process of said input inductor; - an output stage electrically connected with said output terminals and comprising an output inductor, which is magnetically coupled with said input inductor, an output capacitor, which is configured to store electric energy to feed said capacitive load, and a blocking device, which is configured to prevent the flow of a discharging current from said output capacitor towards said input and output inductors; - a coupling capacitor, which is configured to electrically couple said input stage and said output stage by means of a capacitive coupling; - a first sensor configured to provide a first sensing signal indicative of a charging current flowing through said input inductor, when said switching device is in an ON state; - a first controller configured to acquire said first sensing signal and a reference signal indicative of a reference value for said charging current and configured to provide a driving signal for controlling said switching device, said first controller being configured to turn said switching device in an ON state at predefined switch-on instants (t ON) and to turn said switching device in an OFF state at switch-off instants (t OFF), which are determined by said controller by processing the information provided by said first sensing signal and said reference signal. - input terminals (21, 22), which are electrically connectable to an electric power supply; - output terminals (23, 24), which are electrically connectable to an electric load to be charged; - a DC/DC converter of SEPIC type comprising: - an input stage electrically connected with said input terminals and comprising an input inductor, which is configured to store electric energy provided by said power supply, and a switching device, which is configured to control a charging process of said input inductor; - an output stage electrically connected with said output terminals and comprising an output inductor, which is magnetically coupled with said input inductor, an output capacitor, which is configured to store electric energy to feed said capacitive load, and a blocking device, which is configured to prevent the flow of a discharging current from said output capacitor towards said input and output inductors; - a coupling capacitor, which is configured to electrically couple said input stage and said output stage by means of a capacitive coupling; - an input stage electrically connected with said input terminals and comprising an input inductor, which is configured to store electric energy provided by said power supply, and a switching device, which is configured to control a charging process of said input inductor; - an output stage electrically connected with said output terminals and comprising an output inductor, which is magnetically coupled with said input inductor, an output capacitor, which is configured to store electric energy to feed said capacitive load, and a blocking device, which is configured to prevent the flow of a discharging current from said output capacitor towards said input and output inductors; - a coupling capacitor, which is configured to electrically couple said input stage and said output stage by means of a capacitive coupling; - a first sensor configured to provide a first sensing signal indicative of a charging current flowing through said input inductor, when said switching device is in an ON state; - a first controller configured to acquire said first sensing signal and a reference signal indicative of a reference value for said charging current and configured to provide a driving signal for controlling said switching device, said first controller being configured to turn said switching device in an ON state at predefined switch-on instants (t ON) and to turn said switching device in an OFF state at switch-off instants (t OFF), which are determined by said controller by processing the information provided by said first sensing signal and said reference signal.