Electronic converter (30, 100) comprising an input terminal, a common terminal, an output terminal and a reference terminal, and allowing power to be transferred from an alternating voltage source to a load (31, 101), when the alternating voltage source is connected between the input terminal and the common terminal and when the load (31, 101) is connected between the output terminal and the reference terminal, the alternating voltage (V E) having a first frequency and comprising positive alternations alternating with negative alternations, said converter comprising: - an input inductor having a first end connected to the input terminal so as to receive the alternating voltage (V E); - an output inductor connected to the output terminal; - a storage capacitor arranged between the input inductor and the output inductor; - a chopper circuit configured: ∘ in a first operating state, to charge the input inductor by means of the alternating voltage source, and to discharge the storage capacitor into the output inductor while powering the load (31, 101); ∘ in a second operating state, to discharge the input inductor into the storage capacitor, and to discharge the output inductor while powering the load; the chopper circuit comprising a first voltage and current bidirectional switch having a first end connected to a second end of the input inductor, and a second end connected to the common terminal; characterized in that said converter comprises: - a control device for controlling the chopper circuit, configured to activate, during each of the positive and negative alternations, successive operating cycles at a second frequency higher than the first frequency, each operating cycle consisting of the first operating state and of the second operating state, the first operating state having a duty cycle (α) which varies so as to obtain a constant output voltage (Vs) between the output terminal and the reference terminal during each of the positive and negative alternations. - an input inductor having a first end connected to the input terminal so as to receive the alternating voltage (V E); - an output inductor connected to the output terminal; - a storage capacitor arranged between the input inductor and the output inductor; - a chopper circuit configured: ∘ in a first operating state, to charge the input inductor by means of the alternating voltage source, and to discharge the storage capacitor into the output inductor while powering the load (31, 101); ∘ in a second operating state, to discharge the input inductor into the storage capacitor, and to discharge the output inductor while powering the load; the chopper circuit comprising a first voltage and current bidirectional switch having a first end connected to a second end of the input inductor, and a second end connected to the common terminal; ∘ in a first operating state, to charge the input inductor by means of the alternating voltage source, and to discharge the storage capacitor into the output inductor while powering the load (31, 101); ∘ in a second operating state, to discharge the input inductor into the storage capacitor, and to discharge the output inductor while powering the load; - a control device for controlling the chopper circuit, configured to activate, during each of the positive and negative alternations, successive operating cycles at a second frequency higher than the first frequency, each operating cycle consisting of the first operating state and of the second operating state, the first operating state having a duty cycle (α) which varies so as to obtain a constant output voltage (Vs) between the output terminal and the reference terminal during each of the positive and negative alternations.