Controller for a switched mode power converter, switched mode power converter and its control procedure

摘要

A controller for use in an AC-DC switched mode power converter to convert an AC supply that has a phase Ø relative to a zero crossing of the AC power supply and that has an operable switch at a switching frequency fs, configured to control the switching frequency in such a way that it is proportional to the square of the sine of the phase, along at least a part of an alternating current half cycle, half cycle starting at a zero crossing of the current supply alternates, with a constant of proportionality Fmax, according to: ** Formula **