Patent ID: 9490699
Filing Date: 2016-11-08
CPC Classification: H02M,H03M

Claim Text:
1. A digitally controlled current mode power converter, comprising: a power converter stage; a digital-to-analog converter comprising an input and an output and configured to receive a digital target current signal at the input and output an analog target current signal at the output; a slope compensation circuit comprising an input and an output, wherein the input is coupled to the output of the digital-to-analog converter and is configured to receive the analog target current signal therefrom, and wherein the slope compensation circuit is configured to output a slope compensated analog signal at the output, wherein the slope compensation circuit comprises a current source, a replica element, and a capacitor, wherein the capacitor comprises a first electrode and a second electrode, wherein the first electrode is coupled to a node between the digital-to-analog converter and the replica element, and the second electrode is coupled to the current source, wherein the capacitor is configured to subtract a ramp signal from the analog target current signal to generate the slope compensated analog signal; and a comparator comprising a first input, a second input, and an output, wherein the first input is coupled to the power converter stage and is configured to receive an actual analog signal therefrom, the second input is coupled to the output of the slope compensation circuit, and the comparator is configured to output a signal when a value of the actual analog signal is equal to a value of the slope compensated analog signal.