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Integrated low ripple, high frequency power efficient hysteretic controller for dc-dc converters
Integrated low ripple, high frequency power efficient hysteretic controller for dc-dc converters
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机译:用于DC-DC转换器的集成式低纹波,高频功率高效磁滞控制器
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摘要
The present invention relates to a method of improving power efficiency in a converter circuit at low load currents. The method comprises the steps of monitoring a load current of the converter circuit and adjusting a natural frequency of the converter circuit based on the load current. Such an adjustment of the natural frequency results in a reduction in switching losses at low load currents, thereby improving the power efficiency associated therewith. The present invention also relates to a circuit for improving a power efficiency in a dc—dc converter. The circuit comprises a converter circuit and a comparator circuit coupled to an input of the converter circuit. The dc—dc converter also comprises a feedback circuit coupled between an input and an output of the comparator circuit; the feedback circuit is operable to alter a trip frequency of the comparator circuit as a function of a load current at an output of the converter circuit, thereby decreasing switching losses at low load currents and improving the power efficiency associated therewith.
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