CPC H02J 3/381 (2013.01) [H02M 1/0095 (2021.05); H02M 3/156 (2013.01); H02J 2300/26 (2020.01)] | 20 Claims |
1. A voltage conversion circuit, comprising:
an inductor;
a first switch module;
N second switch modules connected in series;
N third switch modules connected in series; and
N−1 flying capacitors, wherein N is an integer greater than or equal to 2;
wherein one terminal of the first switch module is separately connected to one terminal of the N second switch modules connected in series and one terminal of the N third switch modules connected in series, the other terminal of the N third switch modules connected in series is connected to a positive electrode of a high-voltage power supply, the other terminal of the first switch module and the other terminal of the N second switch modules connected in series are connected to a negative electrode of the high-voltage power supply, and a low-voltage power supply is connected to the two terminals of the first switch module through the inductor;
wherein one terminal of an ith flying capacitor in the N−1 flying capacitors is connected to a connection point between an ith second switch module and an (i+1)th second switch module, the other terminal of the ith flying capacitor is connected to a connection point between an ith third switch module and an (i+1)th third switch module, and i is an integer greater than or equal to 1 and less than or equal to N−1;
wherein in one switching period, the circuit performs boost conversion on a voltage output by the low-voltage power supply, by using at least one flying capacitor charging mode and a boost discharging mode; and
wherein at least one flying capacitor comprises a plurality of flying capacitors, the plurality of flying capacitors are connected in parallel in each flying capacitor charging mode and the boost discharging mode.
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