Electronic converter and related lighting system

A lighting system comprising a lighting module and an electronic converter comprising:

• two input terminals for receiving an input voltage;
• two output terminals for providing a DC voltage or a DC current;
• a transformer comprising a primary winding and a secondary winding;
• a switching stage configured to selectively transfer energy from the two input terminals to the primary winding of the transformer;
• a rectification and filter circuit connected between the secondary winding of the transformer and the two output terminals;
• a measurement circuit configured to determine a first signal indicative of the DC voltage or the DC current provided via the output terminals;
• a regulation circuit configured to generate a regulation signal as a function of the first signal and one or more reference signals;
• a driver circuit configured to drive the switching stage as a function of the regulation signal;
• characterized in that the electronic converter comprises:
• an optical, inductive or capacitive coupler;
• a transmission circuit configured to generate a pulse width modulated signal applied to the input of the optical, inductive or capacitive coupler, wherein the transmission circuit is configured to vary the duty cycle and the frequency of the pulse width modulated signal as a function of the first signal and a second signal;
• and
• a receiver circuit configured to monitor the received signal at the output of the optical, inductive or capacitive coupler, the receiver circuit comprising:
• a means configured to generate a third signal indicative of the duty cycle of the received signal by a low-pass or band-pass filtering of the received signal;
• and
• a means configured to generate a fourth signal indicative of the frequency of the received signal and comprising:
• a circuit configured to generate a pulsed signal comprising a pulse with fixed duration each time the received signal comprises a rising edge and/or a falling edge, and
• a low-pass or band-pass filter configured to generate the fourth signal by a filtering of the pulsed signal.