Controller for adjusting a switching frequency in a boost converter

摘要

Thermal levels in an inductor of a boost converter may be managed by controlling an average current through the inductor. For example, a switching frequency of the boost converter between charging and discharging the inductor may be increased or decreased. Increasing or decreasing the switching frequency results in a corresponding decrease or increase in the switching period for the boost converter. The controller may adjust the switching frequency to control the average current level while maintaining a peak-to-peak current level in the inductor by monitoring the inductance of the inductor and the peak current level in the inductor.

主权项

1. A method, comprising:
determining a peak current value through an inductor of a boost converter; determining an inductance value of the inductor of the boost converter, wherein the step of determining the inductance value comprises:
obtaining an initial inductance value of the inductor at a first time;obtaining an updated inductance value of the inductor at a second time;determining a slope compensation value based on the updated inductance value; and adjusting a frequency for switching the inductor between charging and discharging based, at least in part, on the determined peak current value, the determined inductance value, and the slope compensation value.