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本文提出一种飞电感混合DC-DC转换器，适用于1-cell和2-cell电池充电场景，解决了USB-C高输入电压与电池电压之间的高效转换问题。该转换器在10.9W输出时效率达93.4%，在27W输出时效率达97%，实现了高功率密度和宽电压范围。
The annual increase in performance and feature density of mobile products has driven the need for batteries with higher capacity and thus higher power-delivery solutions to maintain sensible charging times. The USB-C power-delivery specification was developed to meet these higher demands by enabling the input supply VBUS voltage at a higher setting, e.g. 9V, to allow higher power delivery, up to 100W, while minimizing current levels and associated IR drops across the USBC cable. To bridge the increased gap from this input voltage to charge one- and two-cell battery products, a power- and space-efficient DC-DC converter is desirable. The key challenge in realizing such converters is achieving the needed output power while meeting product form-factor and on-board thermal constraints. While the traditional Buck converter has been widely used [1], hybrid converter topologies reported in [2,3] are potential candidates for this application. However,
Casey Hardy, Hanh-Phuc Le
University of Colorado, Boulder, CO