Improving the efficiency of DC-DC converters with high-order structure utilizing parasitic inductance for Li-ion battery chargers
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https://doi.org/10.54939/1859-1043.j.mst.78.2022.49-57Keywords:
DC-DC converter; Buck converter; High-order converter; Li-ion battery; Fast charging.Abstract
This paper presents a high-order DC-DC down-converter structure using the parasitic inductance in the USB cable as an inductor for Li-ion battery chargers. The structure provides high conversion efficiency, wide conversion range similar to the conventional Buck converter. Thanks to the continuous input current, the noise and electromagnetic interference (EMI) at the input are significantly reduced. The proposed structure is evaluated with a design for a Li-ion battery charger using a 1 m USB type-C cable. Simulation results show that the achievable peak efficiency of the proposed structure is 95% which is 8% higher than that of the conventional Buck under the same conditions.
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