Low-Voltage Capacitive-Based Step-Up DC-DC Converters for RF Energy Harvesting System: A Review

Churchill, Kishore Kumar Pakkirisami; Chong, Gabriel; Ramiah, Harikrishnan; Ahmad, Mohd Yazed; Rajendran, Jagadheswaran

doi:10.1109/access.2020.3028856

Cited by 33 publications

(13 citation statements)

References 99 publications

(150 reference statements)

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“…The switching loss is negligible when the switching frequency of the footer transistor is lower than the resonant frequency [5]. Also, appropriate sizing of PMOS and NMOS alleviates the tradeoff between switching and conduction loss at a ratio of 2:1 [43]. Proper gate biasing techniques assist in forward conduction and leakage loss [44], [45].…”

Section: B Power Losses Reduction and Optimizationmentioning

confidence: 99%

Design and Implementation of Hybrid DC-DC Converter: A Review

et al. 2023

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The advancement in Power Management Integrated Circuit (PMIC) has driven the DC-DC conversion technology into a System-on-Chip (SoC) solutions, leveraging CMOS technology scaling from 180nm to 22nm and on-chip passive element integration. Concurrently, as the applications demand smaller form factor solution towards device portability with optimized power qualities, switched-capacitor-inductor hybrid architectures with fully-integrated passives have become a popular choice for a compact and high efficiency converter solution, in contrast to bulky and discrete component based alternatives. This article reviews the latest advancements in hybrid dc-dc topologies, specifically for low-power applications to address the downsides such as charge sharing loss, high current ripple, limited conversion ratio, low power density and efficiency. An overview of capacitor and inductor technology is discussed in terms of on-chip parasitic losses, and miniaturization. A comprehensive comparison in the state-of-the-art hybrid dc-dc converter work is tabulated with power density and efficiency as the primary performance metrics, highlighting their operability in low-power applications. Moreover, a discussion is included with quantified benchmarks to justify the viability of converters, along with the future recommendation of realizing ultra-high switching frequency for smaller footprint inductor and design approach to resolve the current tradeoff bottlenecks.

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Section: B Power Losses Reduction and Optimizationmentioning

confidence: 99%

Design and Implementation of Hybrid DC-DC Converter: A Review

et al. 2023

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“…Consequently, the proposed CP consists of a stand-alone boosted driver circuit to solve the above-mentioned issue as an alternative to other competitive techniques with different primary purposes in relation to ultra-low voltage research area (e.g., a clock booster based driver, topology reconfiguration approach, implementation of adiabatic principle and many others [ 10 , 24 , 25 ]. The transistor level schematics of the proposed driver and detailed cross-connection with a complementary replica circuit are shown in Figure 3 and Figure 4 , respectively.…”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

“…According to the state-of-the art, the RF-EH systems dominantly employ inductive DC-DC converters. These are more attractive compared to the capacitive counterparts (charge pumps) due to the higher power conversion efficiency (PCE) and suitability for low-voltage start-up [ 10 ]. Recent research has revealed that the charge pump-based step-up converters reach improved PCE and start-up ability [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Voltage DC-DC Converter for IoT and On-Chip Energy Harvester Applications

Potocny¹,

Kovac²,

Arbet³

et al. 2021

Sensors

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The power saving issue and clean energy harvesting for wireless and cost-affordable electronics (e.g., IoT applications, sensor nodes or medical implants), have recently become attractive research topics. With this in mind, the paper addresses one of the most important parts of the energy conversion system chain – the power management unit. The core of such a unit will be formed by an inductorless, low-voltage DC-DC converter based on the cross-coupled dynamic-threshold charge pump topology. The charge pump utilizes a power-efficient ON/OFF regulation feedback loop, specially designed for strict low-voltage start-up conditions by a driver booster. Taken together, they serve as the masters to control the charge pump output (up to 600 mV), depending on the voltage value produced by a renewable energy source available in the environment. The low-power feature is also ensured by a careful design of the hysteresis-based bulk-driven comparator and fully integrated switched-capacitor voltage divider, omitting the static power consumption. The presented converter can also employ the on-chip RF-based energy harvester for use in a wireless power transfer system.

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“…The procedure of converting energy from ambient sources into electrical energy is called Energy Harvesting (EH) [14]. Some examples of available ambient sources of energy are electromagnetic radiation (such as light [15], [16], and Radio Frequency (RF) waves [17], [18], thermal gradients [19], and mechanical motion [20]).…”

Section: Introductionmentioning

confidence: 99%

Recent Start-Up Techniques Intended for TEG Energy Harvesting: A Review

Ahmed,

Genevey,

Ali

et al. 2024

IEEE Access

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The growing number of energy-autonomous applications raises the need for reliable DC energy harvesting techniques such as Thermoelectric Generators (TEGs). One key issue, however, is the minimum voltage (40-60 mV) required for start-up in small TEG energy harvesting sources. We review in this paper recent start-up solutions for TEG energy harvesting technologies. Different solutions have been categorized into 5 main approaches: external battery, extra-fabrication-processbased, transformers, multisource energy harvesting, and DC-AC-DC conversion using oscillators. The "DC-AC-DC conversion ring oscillators" approach is then shown to be the most promising solution in line with DC energy harvesting applications because it offers several advantages over other approaches, such as allowing full integration with good performance, compatibility with regular CMOS technology, and lower cost. Then, its different implementations are discussed and a detailed analysis is provided to identify their respective advantages and limitations.

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Low-Voltage Capacitive-Based Step-Up DC-DC Converters for RF Energy Harvesting System: A Review

Cited by 33 publications

References 99 publications

Design and Implementation of Hybrid DC-DC Converter: A Review

Design and Implementation of Hybrid DC-DC Converter: A Review

Low-Voltage DC-DC Converter for IoT and On-Chip Energy Harvester Applications

Recent Start-Up Techniques Intended for TEG Energy Harvesting: A Review

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