The embodiment of the application provides a
battery charger based on a
continuous variable-ratio
capacitor converter, a method and a
chip, and belongs to the technical field of
power electronics. The charger comprises an input port, an output port, four flying capacitors, a switch network composed of seventeen switches and a controller. The switch network adopts a
network connection topology, so that each two flying capacitors are directly connected. The controller executes a predetermined timing control strategy, dynamically reconfigures the
capacitor network by periodically operating all switches, so that continuous and efficient
voltage conversion is realized within a preset
voltage conversion ratio range. By optimizing the topology and control, the number of series conduction switches on the main energy transmission path is significantly reduced from eight in the prior art to five, thereby greatly reducing the path impedance and
conduction loss. The actual measurement shows that under the condition of input 12V and output 4.2V, the peak conversion efficiency can reach 92%, and the efficiency remains above 90% in the output
current range of up to 3.3A.