A 12 mV Input, 90.8% Peak Efficiency CRM Boost Converter With a Sub-Threshold Startup Voltage for TEG Energy Harvesting

Mu, Junchao; Liu, Shubin

doi:10.1109/tcsi.2018.2789449

Cited by 38 publications

(13 citation statements)

References 24 publications

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“…Table 2 gives the performance comparison of the proposed converter with previous. 9,12,16,17,19 The proposed multimode boost converter provides the highest peak efficiency (94%) and an ultra-low input voltage (15 mV) with 35.9% efficiency due to the proper operating in CCM and DCM. As can be seen from Table 2, the open-circuit voltage range is larger than the previous studies, 9,12,19 and the peak efficiency is higher than all these works.…”

Section: Work This Workmentioning

confidence: 99%

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A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

Hajiakbari,

Ashraf

2023

Circuit Theory & Apps

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SummaryIn this paper, a high‐efficiency DC–DC boost converter is proposed for thermal energy harvesting systems. The converter's efficiency is improved using a low‐power digital operating mode detector circuit. The operating mode detector circuit changes the converter's operating mode between the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) at a specific input voltage (boundary input voltage), which reduces the total losses, thus improves the efficiency and increases the input voltage range. Besides, the proper boundary input voltage is calculated as a function of the boost converter's parameters. Finally, the proposed converter is designed in a standard 0.18 μm CMOS process. Simulation results show that the peak efficiency of the converter can be up to 94%, 60.4%, and 35% at 300, 20, and 15 mV of the open‐circuit voltage, respectively.

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Section: Work This Workmentioning

confidence: 99%

“…to achieve high peak efficiency with a low minimum input voltage simultaneously in DCM. 12 Different approaches have been proposed in previous studies 2,8,9,[13][14][15][16][17] to overcome this challenge.…”

mentioning

confidence: 99%

A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

Hajiakbari,

Ashraf

2023

Circuit Theory & Apps

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“…Energy harvesting technology can be used in passing sensing devices in internet of things (IoTs) [ 1 , 2 , 3 ] due to the self-power [ 4 , 5 ], which can provide the supply voltage instead of the battery. Recently, there is a lot of research concentrating on harvesting piezoelectric energy [ 6 ], radio frequency (RF) energy [ 7 ], photovoltaic energy [ 8 ] and thermoelectric energy [ 9 , 10 , 11 ]. Among them, thermal energy can be widely used in wearable devices [ 12 ] because the thermoelectric generator (TEG) can convert the temperature difference between human body and the environment into a voltage.…”

Section: Introductionmentioning

confidence: 99%

A 7.5-mV Input and 88%-Efficiency Single-Inductor Boost Converter with Self-Startup and MPPT for Thermoelectric Energy Harvesting

Zhang

et al. 2022

Micromachines

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This paper presents a single-inductor boost converter for thermoelectric energy harvesting. A two-stages startup circuit with a three-phase operation is adopted to obtain self-startup with a single inductor. To extract the maximum energy, a coarse- and fine-tuning MPPT is proposed to adaptively and effectively track the internal source resistance. By designing a zero-current detector, the synchronization loss is reduced, which significantly improves the peak efficiency. The boost converter is implemented in a 0.18-μm standard CMOS process. Simulation results show that the converter self-starts the operation from a TEG voltage of 128 mV and achieves 88% peak efficiency, providing a maximum output power of 3.78 mW. The improved MPPT enables the converter to sustain the operation at an input voltage as low as 7.5 mV after self-startup.

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“…Perturb & observe method (P&O) and fractional open circuit voltage method (FOCV) are the most frequently used MPPT techniques in energy harvesting systems [6,7]. Among them, the FOCV method is preferred for low power application since maximum power point (MPP) can be simply found by using linear relationship between open circuit voltage, V OC and MPP voltage, V MPP of the EHD [8,9,10,11,12,13]. Since the V MPP varies depending on temperature, pressure, or light intensity in energy harvesting application [14,15,16,17,18,19], the V OC is periodically sampled for V MPP calculation after the EHD is unloaded by shutting down the PMU.…”

Section: Introductionmentioning

confidence: 99%

A fast maximum power point tracking boost converter with 80 ns sampling and tracking time for energy harvesting application

Lee

Jeong

2019

IEICE Electron. Express

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In this letter, a continuous conduction mode boost converter with fast and efficient maximum power point tracking (MPPT) is presented for energy harvesting application. A novel current conservation technique is utilized to sample open-circuit voltage of energy harvesting device without any unnecessary power loss during MPPT operation. Fabricated in 0.35 µm CMOS process, the proposed converter achieves a sampling and tracking time of 80 ns for MPPT. Also, the converter has a peak tracking efficiency of 97.2% and a peak power conversion efficiency of 84.8% with 3-V output voltage.

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A 12 mV Input, 90.8% Peak Efficiency CRM Boost Converter With a Sub-Threshold Startup Voltage for TEG Energy Harvesting

Cited by 38 publications

References 24 publications

A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

A wide input range, 94% peak efficiency auto‐select multi‐mode boost converter for thermoelectric energy harvesting

A 7.5-mV Input and 88%-Efficiency Single-Inductor Boost Converter with Self-Startup and MPPT for Thermoelectric Energy Harvesting

A fast maximum power point tracking boost converter with 80 ns sampling and tracking time for energy harvesting application

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