Patent ID: 8129972
Filing Date: 2012-03-06
Classification: H02M

Abstract:
1. A single integrator sensorless current mode (SCM) controller for use with a switching power converter which includes a switching circuit that alternatively connects and disconnects an output inductor to and from a source voltage such that said output inductor conducts a current to an output terminal to produce an output voltage V out , comprising: an amplifier circuit which produces a first current that varies with the difference V a circuit which produces a second current that varies with the voltage V a single integrating element connected to receive said first and second currents such that it integrates both V a comparator which receives the integrated output of said single integrating element at its first input and produces an output that toggles when the voltage at its first input increases above and falls below the voltage at its second input, said comparator output arranged to control the operation of said switching circuit.