采用纹波控制的单电感多输出(SIMO)升压DC-DC变换器用于超低功耗室内光能收集应用

2019 IEEE 11th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management ( HNICEM ) Pub Date : 2019-11-01 DOI:10.1109/HNICEM48295.2019.9072862

Paul Adrian E. Divino, Michelle P. Prunes, Kevin O. Maglinte

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引用次数: 1

摘要

单电感多输出(SIMO)升压DC-DC转换器，适用于超低功耗(ULP)应用，采用65nm台积电技术设计。该变换器在断续传导模式(DCM)下工作时，使用基于纹波的脉冲频率调制(PFM)控制来提升和调节三个输出电压。为了控制输出电压的调节，其控制系统采用一种算法，该算法被转换成数字逻辑电路，并有助于同步功率级的功率MOS开关。除了采用纹波控制和DCM操作外，设计的变换器还采用了strongarm比较器，该比较器在空闲状态下没有功耗，有助于确保系统具有良好的功率转换效率，适合目标应用。该转换器适用于室内应用，其输入电压从0.4V(低光强情况)到0.6V不等。模拟磁芯输出电压为1.2V，数字磁芯输出电压为两个1 V，在1mA负载电流下，变换器具有出色的整体瞬态响应和86%的峰值功率效率。

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Single-Inductor Multiple-Output (SIMO) Boost DC-DC Converter using Ripple-Based Control for Ultra-Low Power Indoor Light Energy Harvesting Applications

A Single-Inductor Multiple-Output (SIMO) Boost DC-DC Converter that operates for Ultra-Low Power (ULP) Applications is designed in 65nm TSMC technology. The converter boosts and regulates three output voltages using Ripple-Based Control of Pulse Frequency Modulation (PFM) while operating in Discontinuous Conduction Mode (DCM). To control the regulation of the output voltages, its control system follows an algorithm that is converted into digital logic circuits and helps in synchronizing the power MOS switching in the power stage. Aside from using Ripple- Based Control and DCM operation, the designed converter also uses a Strong-Arm comparator, which has no power consumption during its idle state to help ensure good power conversion efficiency of the system, making it suitable for the target application. This converter is suitable for indoor applications, for its input voltage could vary from 0.4V, for low light intensity situation, to 0.6V. With output voltages of 1.2V for analog core and two 1 V for digital cores, the converter shows excellent overall transient response and a peak power efficiency of 86% at 1mA load current.

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来源期刊

2019 IEEE 11th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management ( HNICEM )

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