Control circuit, corresponding electronic converter device and method of operating thereof

An electronic converter, comprising:

• input terminals configured to receive an input voltage;
• output terminals configured to provide an output voltage;
• a switching stage comprising an inductance;
• and
• a control circuit coupled to said switching stage, the control circuit including:
• a first terminal configured to provide a drive signal to an electronic switch of said switching stage;
• a second terminal configured to receive from a feedback circuit a first feedback signal proportional to said output voltage;
• a third terminal configured to receive from a current sensor a second feedback signal proportional to a current flow in an inductance of said switching stage;
• a driver circuit configured to provide said drive signal as a function of a Pulse-Width Modulation (PWM) signal;
• and
• a PWM signal generator circuit configured to generate said PWM signal as a function of said first feedback signal, a reference threshold and said second feedback signal or a slope compensation signal,
• wherein the control circuit includes processing circuitry configured to:
• sense an input sensing signal in response to said input voltage being received at said input terminals;
• and
• provide a first compensation parameter and provide a first compensating signal as a function of said input sensing signal elevated to a power equal to an incremented first compensation parameter.

A method of controlling a switching stage of an electronic converter, the electronic converter having input terminals configured to receive an input voltage and output terminals configured to provide an output voltage, the switching stage including an inductance, the method comprising:

• providing, at a first terminal of a control circuit, a drive signal to an electronic switch of said switching stage;
• receiving, at a second terminal of the control circuit, a first feedback signal proportional to said output voltage;
• receiving, at a third terminal of the control circuit, a second feedback signal proportional to a current flow in an inductance of said switching stage;
• providing, by a driver circuit of the control circuit, said drive signal as a function of a Pulse-Width Modulation (PWM) signal;
• and
• generating, by a PWM signal generator circuit of the control circuit, said PWM signal as a function of said first feedback signal, a reference threshold and said second feedback signal or a slope compensation signal;
• sensing, by processing circuitry of the control circuit, an input sensing signal in response to said input voltage being received at said input terminals;
• and
• providing, by the processing circuitry, a first compensation parameter and a first compensating signal as a function of said input sensing signal elevated to a power equal to an incremented first compensation parameter.