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Based on the high-efficiency topology of switch capacitors, a wide range of input voltage can be reduced to half of the output, which can be used to supply power to the load after reducing the bus voltage, or to supply power to the system by reducing the voltage of two batteries. The Charge Pump Converter has the advantages of high efficiency, high integration, and high power density. Among them, some Charger Pump Converter models integrate a step-down Charger function, which can simultaneously act as a Charger to lower the bus voltage and charge the battery. Some Charger Pump Converter models integrate boost Charger function, which can be paired with Buck Charger to charge two batteries to reduce system costs.