Switching power supply operation with reduced harmonic interference
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United States of America Patent
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Aug 20, 2013
Grant Date -
N/A
app pub date -
Aug 4, 2009
filing date -
Aug 4, 2009
priority date (Note) -
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Abstract
Methods of calibrating and operating a switching power supply in an electronic system are disclosed. A switching power supply is calibrated to determine a switching frequency. Harmonic frequencies that are multiples of the switching frequency are determined. A further determination is made as to whether any of the harmonic frequencies falls within one of one or more frequency bands of interest. A second switching frequency is determined such that none of its corresponding harmonic frequencies falls within a frequency band of interest. During operation of the system, the switching power supply is configured to operate at the second switching frequency if operation occurs within one of the frequency bands of interest.
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