Charge pump circuit

• Main Authors: WANG YUNSONG, DONG YUAN, CHENG JIANTAO, SUN HONGJUN, HUANG JIANGANG
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2019
• 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

The present invention provides a charge pump circuit including a clock signal generating module, a first capacitor, a second capacitor, a charge and discharge control module, and a bias current generating module. The bias current generating module is used for sampling a current on a load and generating a bias current according to the sampled current. The clock signal generating module is used forgenerating a clock signal according to the bias current. The charge and discharge control module is used for controlling one capacitor in the first and second capacitors to charge and the other capacitor to supply power to the load according to the clock signal. When the load is changed, the current and the bias current of the sampled load are changed correspondingly such that the frequency of thegenerated clock signal is changed accordingly, therefore, a ripple voltage is reduced or maintained, and the voltage fluctuation on the load is reduced. 本发明提供了种电荷泵电路，包括时钟信号产生模块、第电容、第二电容、充放电控制模块和偏置电流产生模块；所述偏置电流产生模块用于采样负载上的电流，并