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ACOUSTIC NOISE REDUCTION IN A DC-DC CONVERTER USING VARIABLE FREQUENCY MODULATION
ACOUSTIC NOISE REDUCTION IN A DC-DC CONVERTER USING VARIABLE FREQUENCY MODULATION
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机译:使用可变频率调制的DC-DC转换器中的噪声降低
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摘要
The present embodiments relate generally to switched-capacitor (SC) based DC-DC converters, and more particularly to modulation schemes of cap dividers that include ceramic capacitors such as MLCCs. According to certain general aspects, the present embodiments increase the switching frequency at light loads using variable frequency modulation schemes to reduce the voltage difference across the MLCCs. In these and other embodiments, the acoustic noise generated from the MLCCs can be reduced while maintaining excellent light load efficiency. According to certain aspects, this can be achieved with minimal impact on system performance, cost and size.
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