Electronic circuit for driving LED strings so as to reduce the light flicker

An electronic circuit for driving a plurality of LED strings cascaded to one another, each LED string having a respective cathode terminal, said electronic circuit comprising:

• a plurality of regulation modules;
• and
• a brightness-compensation module;
• wherein each regulation module is configured to be coupled to the cathode terminal of a corresponding LED string, to a resistive element, and to a capacitor coupled to the resistive element and configured to be charged through at least one portion of a current that flows in the resistive element, said regulation modules being further configured to carry out in sequence a current-regulation phase as a function of an evolution of a rectified grid voltage;
• and wherein each regulation module is further configured so that, when said regulation module carries out the current-regulation phase, the regulation module regulates a current that flows in the corresponding LED string, in the previous LED strings, and in the resistive element;
• and
• wherein said brightness-compensation module comprises:
• a compensation regulator coupled to a compensation LED string and to the capacitor;
• and
• a first generator coupled to said plurality of regulation modules and to said compensation regulator and configured to generate a first electrical quantity indicating the luminous flux emitted by said plurality of LED strings and by the compensation LED string;
• and
• wherein the compensation regulator is configured to regulate a current that flows in the compensation LED string as a function of said first electrical quantity, discharging the capacitor through the compensation LED string.