METHOD AND APPARATUS FOR REDUCING EMI FOR A FREQUENCY-MODULATED DC-DC CONVERTER

摘要

The embodiment of the present disclosure provides a method and apparatus for reducing EMI for a frequency-modulated DC-DC converter. The method includes: pre-regulating an input voltage of the frequency-modulated DC-DC converter, so that the frequency-modulated DC-DC converter changes an operating frequency of the frequency-modulated DC-DC converter to stabilize an output voltage of the frequency-modulated DC-DC converter, so as to achieve a desired frequency extension. According to the embodiments of the present disclosure, it is possible to stabilize an output of a frequency-modulated DC-DC converter while spread a switching noise spectrum and reduce a level of average EMI noise.