支持热拔插的高效率电荷泵设计  

Design of a high-efficiency charge pump supporting hot-swapping

作　　者：罗志聪[1] 孙奇燕[1] 方金花 

机构地区：[1]福建农林大学机电工程学院,福建福州350002 [2]贝莱特集成电路(福州)有限公司,福建福州350003

出　　处：《福建农林大学学报（自然科学版）》2016年第2期237-240,共4页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省科技厅重大资助项目(2012N5002)

摘　　要：提出了一种高效率的电荷泵电路结构,在相同输入电压条件下,其输出电压比传统电荷泵高出1个阈值电压.此外,针对传统电荷泵电路在上电过程中存在浪涌电流的缺点,设计了一个两级限流电路,实现电荷泵电路的软启动,确保芯片在热拔插过程中,不会影响输入电源线上的其他芯片的正常工作.芯片测试结果表明在电源电压为2.7 V、负载电容为4.5μF、负载电阻为600Ω的条件下,提供4.8 V的输出电压,上升时间约为36 ms,实现可靠性工作,效率最高达到83%.A high-efficiency charge pump which supported hot-swapping was proposed basing on 130 nm CMOS process. High efficiency was achieved by higher level of threshold voltage than traditional charge pump. Meanwhile,a two-stage current-limiting circuit was incoporated to ensure soft start and avoid inrush current which was common in traditional circuit. Results showed that the proposed charge pump was capable of supplying 4. 8 V output voltage under 2. 7 V input supply voltage,with rise time being about36 ms under 4. 5 μF load capacitance and 600 Ω load resistor.

关 键 词：热拔插 电荷泵 软启动电路 高可靠性 

分 类 号：TM343[电气工程—电机]