Load current feedforward schemes for current-mode controlled power converters

A method of operating a switching power converter circuit, the method comprising:

• charging an inductor using energy provided at an input circuit node of the power converter circuit;
• modulating the charging of the inductor to regulate a voltage of a regulated circuit node of the switching power converter circuit using a control circuit loop coupled to the regulated circuit node, wherein the control loop feeds forward a load current sensed at an output circuit node and the charging of the inductor is modulated using sensed inductor current and the fed forward sensed load current;
• filtering the sensed load current using a compensation circuit coupled to a compensation circuit node of the switching power converter circuit;
• adjusting the modulating of the charging of the inductor by adjusting a voltage of the compensation circuit node according to sensed inductor current and the filtered sensed load current.

An electronic system comprising:

• a switching power converter circuit including
• an inductor arranged to receive input energy from an input circuit node;
• a switch circuit coupled to the inductor;
• an inductor current sensing element;
• a load current sensing circuit element coupled to a regulated circuit node;
• a feedforward circuit coupled to the load current sensing circuit element and configured to produce a feedforward signal representative of the load current;
• a control circuit coupled to the switch circuit and configured to modulate activation of the switch circuit to regulate a voltage at the regulated circuit node;
• and
• a compensation circuit coupled to the feedforward circuit and configured to provide a filtered feedforward signal to a compensation circuit node of the control circuit wherein the control circuit adjust modulation of the switch circuit according to a sensed inductor current and the filtered feedforward signal;
• and
• a first amplifier circuit operatively coupled to the regulated voltage node as a first amplifier supply connection and operatively coupled to circuit ground as a second amplifier supply connection.