一种电荷泵电路

• Format: Patent
• Language: Chinese
• Published: 05.09.2025
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

本申请公开了一种电荷泵电路，包括第一开关，控制端在时钟信号的第一电平状态时接收驱动电压，衬底端接收电源电压和输出电压中之一；第二开关，控制端在时钟信号的第二电平状态时接收驱动电压，衬底端接收电源电压；飞电容，第一端经第一开关接收电源电压，第二端经第二开关接收电源电压，第一开关导通时第二开关关断，电源电压向飞电容充电，第二开关导通时第一开关关断，飞电容放电产生输出电压，当电源电压小于预设的输出电压时，提供至第一开关的驱动电压小于提供至第二开关的驱动电压。本申请根据电源电压的大小自适应地调节第一开关和第二开关的过流能力，以保证飞电容的压差随电源电压的变化较小，提升了电路稳定性。 Disclosed in the present application is a charge pump circuit, comprising a first switch, wherein a control end thereof receives a drive voltage when a clock signal is in a first level state, and a substrate end thereof receives either of a power supply voltage and an output voltage; a second switch, wherein a control end thereof receives a drive voltage when the clock signal is in a second level state, and a substrate end thereof receives a power supply voltage; and a flying capacitor, wherein a first end thereof receives a power supply voltage by means of the first switch, and a second end thereof receives a power supply voltage by means of the second switch. When the first switch is turned on, the second switch is turned