半导体学报2009，Vol.30Issue(10)：121-125,5.DOI:10.1088/1674-4926/30/10/105012
Research and design of a novel current mode charge pump
Research and design of a novel current mode charge pump
摘要
Abstract
To meet the demands for a number of LEDs, a novel charge pump circuit with current mode control is proposed. Regulation is achieved by operating the current mirrors and the output current of the operational transcon ductance amplifier. In the steady state, the input current from power voltage retains constant, so reducing the noise induced on the input voltage source and improving the output voltage ripple. The charge pump small-signal model is used to describe the device's dynamic behavior and stability. Analytical predictions were verified by Hspice sim ulation and testing. Load driving is up to 800 mA with a power voltage of 3.6 V, and the output voltage ripple is less than 45 mV. The output response time is less than 8 μs, and the load current jumps from 400 to 800 mA.关键词
charge pump/ noise/ output voltage ripple/ operational transconductance amplifierKey words
charge pump/ noise/ output voltage ripple/ operational transconductance amplifier分类
信息技术与安全科学引用本文复制引用
Li Xianrui,Lai Xinquan,Li Yushan,Ye Qiang..Research and design of a novel current mode charge pump[J].半导体学报,2009,30(10):121-125,5.基金项目
Project supported by the National Natural Science Foundation of China (No. 60876023). （No. 60876023）
