Research and design of a novel current mode charge pump |
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| Li Xianrui, Lai Xinquan, Li Yushan, Ye Qiang. Research and design of a novel current mode charge pump[J]. Journal of Semiconductors, 2009, 30(10): 105012. doi: 10.1088/1674-4926/30/10/105012 Li X R, Lai X Q, Li Y S, Ye Q. Research and design of a novel current mode charge pump[J]. J. Semicond., 2009, 30(10): 105012. doi: 10.1088/1674-4926/30/10/105012.Export: BibTex EndNote |
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| Authors: | Li Xianrui Lai Xinquan Li Yushan Ye Qiang |
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| Affiliation: | Research Institute of Design Circuit, Xidian University, Xi’an 710071, China;Research Institute of Design Circuit, Xidian University, Xi’an 710071, China;Research Institute of Design Circuit, Xidian University, Xi’an 710071, China;Research Institute of Design Circuit, Xidian University, Xi’an 710071, China |
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| 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. |
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| Keywords: | charge pump noise output voltage ripple operational transconductance amplifier |
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