Methods and systems of a switching power converter for controlling average current and with frequency adjustment

摘要

A switching power converter for controlling average current and with frequency adjustment. One example embodiment is a method of operating a switching power converter, the method including: operating the switching power controller at a switching frequency that is variable, each switching period comprises a charge mode of an inductor of the switching power converter and a discharge mode of the inductor; controlling, by a current control loop, average current provided from the switching power converter by controlling peak current in each charge mode of the inductor; and regulating, by a frequency control loop, the switching frequency of the switching power. The regulating may include: adjusting a relationship of output voltage to a length of discharge modes of the inductor; and changing the peak current through the inductor during charge modes.