Flying capacitor charging method and apparatus

A flying capacitor charging apparatus, comprising a multi-level topology circuit, wherein the multi-level topology circuit is connected to an input power source by using a first switch, wherein the multi-level topology circuit is connected to an output power source by using a second switch, wherein the multi-level topology circuit comprises one or more flying capacitors, wherein a first end of a first capacitor in the one or more flying capacitors is connected to a first electrode of a first semiconductor switch transistor, wherein a second end of the first capacitor is connected to a second electrode of a second semiconductor switch transistor, wherein a second electrode of the first semiconductor switch transistor is connected to a first electrode of the second semiconductor switch transistor by using a second capacitor, wherein the first capacitor is any one of the one or more flying capacitors, and wherein the second capacitor is an input capacitor, an output capacitor, or a flying capacitor other than the first capacitor in the one or more flying capacitors;

• and
• a controller configured to:
• close the first semiconductor switch transistor and the second semiconductor switch transistor, to connect the first capacitor to the second capacitor in parallel;
• charge the first capacitor and the second capacitor to a first specified voltage value;
• open the first semiconductor switch transistor and the second semiconductor switch transistor;
• and
• charge the second capacitor to a second specified voltage value.

A non-transitory computer-readable medium having instructions stored therein, which when executed by a processor, cause the processor to perform operations, the operations comprising:

• closing a first semiconductor switch transistor and a second semiconductor switch transistor, to connect a first capacitor to a second capacitor in parallel, wherein a multi-level topology circuit is connected to an input power source by using a first switch, wherein the multi-level topology circuit is connected to an output power source by using a second switch, wherein the multi-level topology circuit comprises one or more flying capacitors, wherein a first end of the first capacitor in the one or more flying capacitors is connected to a first electrode of the first semiconductor switch transistor, wherein a second end of the first capacitor is connected to a second electrode of the second semiconductor switch transistor, wherein a second electrode of the first semiconductor switch transistor is connected to a first electrode of the second semiconductor switch transistor by using the second capacitor, and wherein the first capacitor is any one of the one or more flying capacitors, and the second capacitor is an input capacitor, an output capacitor, or a flying capacitor other than the first capacitor in the one or more flying capacitors;
• charging the first capacitor and the second capacitor to a first specified voltage value;
• opening the first semiconductor switch transistor and the second semiconductor switch transistor;
• and
• charging the second capacitor to a second specified voltage value.