Current limiting scheme for a converter

An electronic device, comprising:

• a converter, comprising:
• an inductor;
• a switch circuit, coupled to said inductor, that is configured to switch current through said inductor to convert an input voltage to an output voltage as controlled by a first switch control signal;
• and
• a modulator configured according to a current limiting scheme, comprising:
• a current limit generator that is configured to provide a periodic ramping current limit value based on a selected one of an input value indicative of said input voltage and an output value indicative of said output voltage, and further based on an inductance of said inductor, a clock signal, and a predetermined maximum output current of said converter;
• and
• a comparator network that is configured to provide said first switch control signal by comparing a current sense value indicative of a current through said inductor with a lesser of a compensation error value and said periodic ramping current limit value.

A method configured to limit current through an inductor of a current controlled converter that converts an input voltage to an output voltage, said method comprising:

• receiving a current sense value indicative of current through the inductor;
• receiving a compensation value indicative of an error of the output voltage;
• developing a periodic ramping current limit value based on a selected one of the output voltage and the input voltage, and further based on an inductance of the inductor, a clock signal, and a predetermined maximum output current of the converter;
• determining a lesser of the compensation value and the periodic ramping current limit value to provide a selected current limit value;
• and
• providing a switch control signal to control switching of current through the inductor using the clock signal and by comparing the selected current limit value with the current sense value.