A single-inductor triple-input-triple-output (SITITO) energy harvesting interface with cycle-by-cycle source tracking and adaptive peak-inductor-current control

2017 IEEE Asian Solid-State Circuits Conference (A-SSCC) Pub Date : 1900-01-01 DOI:10.1109/ASSCC.2017.8240229

Chi-Wei Liu, Ming-Jie Chung, Hui-Hsuan Lee, Pei-Chun Liao, Po-Hung Chen

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引用次数: 6

Abstract

In this paper, a single-inductor triple-input-triple-output (SITITO) buck-boost converter with cycle-by-cycle source tracking (CCST) is developed for multi-source energy harvesting. The proposed CCST is capable of harvesting power from the PV and TEG simultaneously, and automatically selects the appropriate source according to the maximum power point (MPP) of the transducers in each switching cycle. The converter provides two regulated outputs for the analog (Vout1 = 1.2 V) and the digital (Vout2 = 0.4–0.6 V) circuits, while storing the excess energy in a storage capacitor (Cout3). An adaptive on-time (AOT) circuit with an adaptive peak-inductor-current (APIC) control is developed for dynamically adjusting the on-time based on the input voltage (VIN) to obtain high conversion efficiency under different VIN. The proposed converter achieves a peak efficiency of 84.4% with an available input voltage of 0.05 V to 0.8 V. Compared to the conventional constant peak-inductor-current (CPIC) control, the proposed APIC improves 11 % efficiency at low Vin.

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单电感三输入三输出(SITITO)能量收集接口，具有逐周期源跟踪和自适应峰值电感电流控制

本文设计了一种具有逐周源跟踪(CCST)的单电感三输入三输出(SITITO)降压变换器，用于多源能量收集。所提出的CCST能够同时从PV和TEG收集功率，并根据每个开关周期中换能器的最大功率点(MPP)自动选择合适的电源。转换器为模拟(Vout1 = 1.2 V)和数字(Vout2 = 0.4-0.6 V)电路提供两个稳压输出，同时将多余的能量存储在存储电容(Cout3)中。为了在不同电压下获得较高的转换效率，设计了一种具有自适应峰值电感电流控制的自适应导通时间(AOT)电路，可根据输入电压动态调节导通时间。该变换器在0.05 V ~ 0.8 V的有效输入电压下实现了84.4%的峰值效率。与传统的恒峰电感电流(CPIC)控制相比，本文提出的APIC在低电压下的效率提高了11%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE Asian Solid-State Circuits Conference (A-SSCC)

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