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本文提出了一种11/1高电压转换比的开关电容DC-DC转换器，用于AC-DC应用中的次级转换，解决高电压转换比下的效率问题。该转换器在轻载下实现94.7%的效率，输出3.3V、100mW。
a very large voltage conversion ratio since the rectified US and EU mains have DC levels of 169V and 325V, respectively. Primary converters, such as flyback converters, use the winding ratio of the isolation transformer to achieve large step-down ratios and generate bus voltages of about 12V. The higher the bus voltage, the higher the efficiency of the primary converter can be and the lower the bus impedance loss. This motivates the investigation of highly efficient DC-DC converters with high voltage conversion ratios (VCRs) to use as secondary converters in AC-DC applications. Inductive buck converters typically perform high-ratio voltage step-down. Recently, however, their switched-capacitor (SC) counterparts have been
Hans Meyvaert1, Gerard Villar Piqué2, Ravi Karadi2,
Henk Jan Bergveld2, Michiel Steyaert1 KU Leuven, Leuven, Belgium, NXP Semiconductors, Eindhoven, The Netherlands 1 2 Getting from the mains to a few volts to power electronic circuits requires