US 12,463,535 B2
Switched-capacitor voltage conversion circuit, voltage converter, and chip
Wei Zhao, Shanghai (CN)
Assigned to Southchip Semiconductor Technology (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Southchip Semiconductor Technology (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Oct. 26, 2023, as Appl. No. 18/495,734.
Claims priority of application No. 202211466027.0 (CN), filed on Nov. 22, 2022.
Prior Publication US 2024/0171068 A1, May 23, 2024
Int. Cl. H02M 3/07 (2006.01)
CPC H02M 3/07 (2013.01) 20 Claims
OG exemplary drawing
 
1. A switched-capacitor voltage conversion circuit, comprising: a first pathway and a second pathway; wherein
a first terminal of the first pathway and a first terminal of the second pathway are both electrically connected to an input terminal of the switched-capacitor voltage conversion circuit, the input terminal of the switched-capacitor voltage conversion circuit is connected to an input voltage, a second terminal of the first pathway is electrically connected to a third terminal of the second pathway, a third terminal of the first pathway is electrically connected to a second terminal of the second pathway, a fourth terminal of the first pathway and a fourth terminal of the second pathway are both electrically connected to a first output terminal of the switched-capacitor voltage conversion circuit, and a fifth terminal of the first pathway is electrically connected to a fifth terminal of the second pathway;
the first pathway comprises a first capacitor, a second capacitor, and a first switch assembly, and the second pathway comprises a third capacitor, a fourth capacitor, and a second switch assembly, a switch assembly comprising the first switch assembly and the second switch assembly;
the switch assembly is configured to control a connection between any two of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor so that the second capacitor is connected in series to the fourth capacitor, the second capacitor and the fourth capacitor which are connected in series are connected in parallel to the third capacitor, and then a circuit formed by the second capacitor, the fourth capacitor and the third capacitor is further connected in series to the first capacitor, and finally a circuit formed by the second capacitor, the fourth capacitor, the third capacitor and the first capacitor is connected between the input terminal and the first output terminal of the switched-capacitor voltage conversion circuit, or so that the second capacitor is connected in series to the fourth capacitor, the second capacitor and fourth capacitor which are connected in series are connected in parallel to the first capacitor, and then a circuit formed by the second capacitor, the fourth capacitor and the first capacitor is further connected in series to the third capacitor, and finally a circuit formed by the second capacitor, the fourth capacitor, the first capacitor and the third capacitor is connected between the input terminal and the first output terminal of the switched-capacitor voltage conversion circuit; and
the switched-capacitor voltage conversion circuit is configured to convert the input voltage to a first output voltage, and output the first output voltage via the first output terminal of the switched-capacitor voltage conversion circuit, wherein the input voltage is four times of the first output voltage.