A Fully Integrated 60 mV Cold-Start Circuit for Single Coil DC–DC Boost Converter for Thermoelectric Energy Harvesting

Coustans, Mathieu; Krummenacher, F.; Kayal, Maher

doi:10.1109/tcsii.2019.2922683

Cited by 19 publications

(11 citation statements)

References 18 publications

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“…However, non-ideal CPs have many parasitics that deteriorate performance such as the finite output impedance including modulation index and parasitics capacity at switching nodes, etc. [ 17 , 18 , 19 ]. Under low-voltage subthreshold conditions and the high current throughput requirement (see RF-harvester application in Section 3 ) across the system, the output impedance plays a very important role and should be minimized as much as possible.…”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

“…In this sense, we would like to state the following: Impedance modulation index , which is the result of finite on-state transistor resistance

of main switches—

and

(see Figure 2 ) – is usually reduced by bootstrapping techniques implemented in the CP cell [ 20 , 21 ]; The ideal term

, which is valid for linear CP, is topology-dependent and can be managed exclusively by topology interventions.

is a number of stages in the cascade, k is a number of power flow patches known as branches,

is clock frequency and

represents the main flying capacitor (in Figure 2 denoted as

, where x stands for p or n ) [ 18 ]. …”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

“…The ideal term

, which is valid for linear CP, is topology-dependent and can be managed exclusively by topology interventions.

is a number of stages in the cascade, k is a number of power flow patches known as branches,

is clock frequency and

represents the main flying capacitor (in Figure 2 denoted as

, where x stands for p or n ) [ 18 ].…”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

See 2 more Smart Citations

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.

show abstract

Section: Dc-dc Converter Systemmentioning

confidence: 99%

“…In this sense, we would like to state the following: Impedance modulation index , which is the result of finite on-state transistor resistance

of main switches—

and

(see Figure 2 ) – is usually reduced by bootstrapping techniques implemented in the CP cell [ 20 , 21 ]; The ideal term

, which is valid for linear CP, is topology-dependent and can be managed exclusively by topology interventions.

is a number of stages in the cascade, k is a number of power flow patches known as branches,

is clock frequency and

represents the main flying capacitor (in Figure 2 denoted as

, where x stands for p or n ) [ 18 ]. …”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

“…The ideal term

, which is valid for linear CP, is topology-dependent and can be managed exclusively by topology interventions.

is a number of stages in the cascade, k is a number of power flow patches known as branches,

is clock frequency and

represents the main flying capacitor (in Figure 2 denoted as

, where x stands for p or n ) [ 18 ].…”

Section: Dc-dc Converter Systemmentioning

confidence: 99%

See 1 more Smart Citation

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

Potocny¹,

Kovac²,

Arbet³

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…Therefore, clean and environmentally friendly energy harvesting technology, which scavenges ambient energy, is receiving more and more attention due to its long service life [1][2][3][4][5][6]. The thermoelectric generator (TEG), which converts thermal energy into electricity based on the Seebeck effect, stands out among many energy harvesters due to its simple structure, small size, rich thermal energy, and the absence of pollution and noise [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

MPPT Circuit Using Time Exponential Rate Perturbation and Observation for Enhanced Tracking Efficiency for a Wide Resistance Range of Thermoelectric Generator

et al. 2021

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The thermoelectric generator (TEG) stands out among many energy harvesters due to its simple structure, small size, rich thermal energy, and the absence of pollution and noise. However, previous studies have rarely probed into the influence of TEG internal resistances on extracting maximum power from TEGs, and the tracking of efficiency is limited. By analyzing the relationship between the tracking efficiency and the TEG internal resistances, a time exponential rate perturbation and observation (P&O) technology is proposed to achieve maximum power point tracking (MPPT) for a wide resistance range of the TEG. Using the time exponential rate P&O, the MPPT circuit observed the power change by comparing the positive-channel metal-oxide semiconductor (PMOS) on-time and perturbs the power by adjusting the negative-channel metal-oxide semiconductor (NMOS) on-time exponentially. The MPPT circuit was implemented in a 110 nm complementary metal-oxide semiconductor (CMOS) process. The tracking efficiency maintained a high level from 98.9 to 99.5%. The applicable range of the TEG resistance was from 1 to 12 Ω, which reflects an enhancement of at least 2.2 times.

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“…With the development of the Internet of Things and wearable devices, the low supply voltage and low power requirements of these applications challenge the power management circuit design. The micro energy harvesting technology, as a reliable solution, can generate electrical energy from other energy sources like solar [1,2,3], vibrations [4], thermal [5,6,7,8,9,10,11,12,13,14,15,16,17,18], piezoelectric [19,20,21] and radio waves [22,23,24]. However, the voltage generated by thermoelectric generators (TEGs) or photovoltaic (PV) panels is only a few tens of millivolts or a few hundred millivolts, which is hard to drive general circuits.…”

Section: Introductionmentioning

confidence: 99%

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

Guo

Chen

Lei

et al. 2020

IEICE Electron. Express

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A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting is presented in this paper. It is found that the cross-coupled LC oscillator with asymmetric inductors can output much higher voltage than ordinary oscillators. Thus, the asymmetric inductors reconfigurable technology (AIRT) is used in the self-start circuit and a minimum startup voltage of 150mV is achieved. The AIRT realizes dual-output and improves the utilization of chip pins by reusing inductors in the self-start circuit and the boost system. The self-start circuit and the boost system are implemented in a 0.13µm CMOS process and a 73.7% converter efficiency is achieved. The chip area of the boost converter is 0.155mm 2. The area occupied by self-start circuit is only of 0.006mm 2 without other extra energy sources.

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A Fully Integrated 60 mV Cold-Start Circuit for Single Coil DC–DC Boost Converter for Thermoelectric Energy Harvesting

Cited by 19 publications

References 18 publications

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

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

MPPT Circuit Using Time Exponential Rate Perturbation and Observation for Enhanced Tracking Efficiency for a Wide Resistance Range of Thermoelectric Generator

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

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