应用于智能家居的高效率升压电荷泵研究

发布时间：2018-11-06 10:26

【摘要】：随着经济的发展和人们对生活质量的要求不断提高,生活智能化将会是人们高质量生活的必然趋势。在国家“十二五规划”号召下,智能家居市场迎来了发展的契机,但智能家居中的传感器以及其他子系统一直受电池使用寿命的制约,采用新能源和延长电池使用寿命是解决智能家居中频繁更换电池的有效方案。由于电荷泵系统具有对电源电压要求低、转换效率高以及噪声低的特点,运用在新能源的电压转换以及延长电池使用寿命上具有实际意义。本课题基于SMIC 55nm CMOS工艺,针对上述两种方案设计了两种电荷泵系统。在采用新能源的方案中,由于新能源电池的输出电压低,一般仅有0.3V到0.6V,对于普通的升压电路无法实现功率管的导通,本文设计了由环形振荡器、非交叠时钟电路、电荷泵功率级构成的电荷泵升压系统实现低压到高压的转换,驱动升压系统的功率管；在延长电池使用寿命方案中,本课题设计了一款全集成的电荷泵升压系统。该系统采用脉冲跳变调制方式,实现稳定的输出电压。为了提高电荷泵的功率转换效率,本课题设计了低压低功耗的电压基准电路以及迟滞比较器。在Cadence软件环境下实现电路的前端设计、版图设计以及后仿验证。结果表明：本课题设计的低压应用电荷泵可以在电源电压为0.3V下实现1.15V的输出电压,上升时间仅需21μs,系统功耗为16.8μA,泵效率可以达到95%；设计的全集成高效电荷泵系统可以在0.7V到0.9V的电源电压下,实现稳定的1.2V输出电压,纹波小于0.1V,仅用了5nF的电容在0.8V电源电压下可以提供1.1mA的负载电流,电荷泵系统的最大效率可以达到73%。本课题设计的电荷泵满足设计指标的要求,可以应用在智能家居中的DC/DC电压转换方面。
[Abstract]:With the development of economy and the improvement of people's quality of life, life intelligence will be the inevitable trend of high quality life. Under the call of the 12th Five-Year Plan, the smart home market has ushered in the opportunity of development, but sensors and other subsystems in the smart home have been restricted by the battery life. Using new energy and prolonging battery life is an effective way to solve the problem of frequent battery replacement in smart home. Because the charge pump system has the characteristics of low power supply voltage, high conversion efficiency and low noise, it has practical significance in voltage conversion of new energy sources and prolongation of battery life. Based on SMIC 55nm CMOS process, two charge pump systems are designed for the above two schemes. In the scheme of adopting new energy, because the output voltage of the new energy battery is low, it is generally only 0.3V to 0.6V, for the ordinary boost circuit can not realize the conduction of power transistor, this paper designs the ring oscillator, non-overlapping clock circuit. The charge pump booster system composed of the charge pump power level realizes the conversion from low pressure to high pressure and drives the power tube of the booster system. In the project of prolonging battery life, a fully integrated charge pump booster system is designed. The system adopts pulse jump modulation to realize stable output voltage. In order to improve the power conversion efficiency of charge pump, a low voltage and low power consumption voltage reference circuit and hysteresis comparator are designed. The front-end design, layout design and post-imitation verification of the circuit are realized in the Cadence software environment. The results show that the low voltage application charge pump designed in this paper can realize the output voltage of 1.15V at 0.3V supply voltage, the rising time is only 21 渭 s, the power consumption of the system is 16.8 渭 A. the pump efficiency can reach 95V; The designed fully integrated and efficient charge pump system can achieve stable 1.2 V output voltage with ripple less than 0.1 V under 0.7 V to 0.9 V power supply voltage. Only the capacitance of 5nF can provide the load current of 1.1mA at 0.8 V supply voltage, and the maximum efficiency of charge pump system can reach 7375%. The charge pump designed in this paper can meet the requirements of design index and can be applied to DC/DC voltage conversion in smart home.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM46

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