Patent ID: 11894762
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A direct current-direct current conversion circuit, comprising: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a first inductor, a first diode, a first buffer circuit, a second switch, a second inductor, a second diode, and a second buffer circuit, wherein
a power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series, wherein a first terminal of the input inductor is connected to a positive electrode of the power supply, a second terminal of the input inductor is connected to a positive electrode of the first diode, and a negative electrode of the first diode is connected to a positive electrode of the second diode;
a first branch is connected in parallel between the second terminal of the input inductor and a negative electrode of the power supply, the first branch comprises the first inductor, the first switch, the second inductor, and the second switch that are sequentially connected in series, and the first inductor is connected to the second terminal of the input inductor;
a first terminal of the flying capacitor is connected between the first diode and the second diode, and a second terminal of the flying capacitor is connected between the first switch and the second inductor;
a first terminal of the first buffer circuit is connected to the positive electrode of the first diode, a second terminal of the first buffer circuit is connected between the first inductor and the first switch, a third terminal of the first buffer circuit is connected to the negative electrode of the first diode, and a fourth terminal of the first buffer circuit is connected to the second terminal of the flying capacitor;
a first terminal of the second buffer circuit is connected to the second terminal of the flying capacitor, a second terminal of the second buffer circuit is connected between the second inductor and the second switch, a third terminal of the second buffer circuit is connected between the first capacitor and the second capacitor, and a fourth terminal of the second buffer circuit is connected to the negative electrode of the power supply;
the first buffer circuit is configured to transfer energy of the first inductor to the first capacitor and the second capacitor when the first switch is in a disconnected state; and
the second buffer circuit is configured to transfer energy of the second inductor to the second capacitor when the second switch is in a disconnected state.