Patent ID: 9641081
Date: 2017-05-02
CPC Classifications: H02M,H03F

Claim:
1. A boost converter for converting between an input voltage and an output voltage on an output load, comprising: an inductor connected to the input voltage; a switching arrangement, including a first switch between the inductor and the output load and for controlling switching of current from the inductor to the output load; and a controller, including circuitry, for controlling a duty cycle of the switching, wherein the duty cycle is controlled in response to the current reaching a peak current level which varies over time with a peak current level function that includes a parabolic slope compensation function, wherein the compensation value is derived as a function of the output voltage offset by an input value, and of both inductor inductance and converter switching frequency, wherein the peak current level function comprises a combination of a target peak value derived from a target average inductor current and a slope compensation function which periodically varies with a period corresponding to a converter switching period.