The disclosure describes a power-efficient, low-footprint, and fast battery charger based on a hybrid of the charge pump and the three-level chargers. The charger is low cost, reduces thermal dissipation, increases battery-charging speed, and is compatible with wired and wireless charging.
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Lin, Kun-Wei; Chien, Graham; Liao, Weichih; Chang, Jackyjm; Pan, Robbins; and Lin, Ben, "Fast battery-charging architecture", Technical Disclosure Commons, (May 31, 2019)