A Dual-Output Thermoelectric Energy Harvesting Interface With 86.6% Peak Efficiency at 30 &lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;$\mu {\text {W}}$ &lt;/tex-math&gt; &lt;/inline-formula&gt; and Total Control Power of 160 nW

Katic, Janko; Rodriguez, Saul; Rusu, Ana

doi:10.1109/jssc.2016.2561959

Cited by 53 publications

(43 citation statements)

References 19 publications

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“…The efficiency roll-off occurs when the sum of P loss and P ctrl becomes comparable to the input power. Unlike the conduction losses, the switching losses do not scale down with the input power (voltage) [12]. As a result, at very low power levels, P loss is usually dominated by the switching losses.…”

Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

“…The proposed technique aims to mitigate the influence of the switching losses and maintain a high efficiency of the converter at low power levels. To achieve high efficiency, the optimal values of the power transistors' widths (W N and W P ), switching frequency (f s ) and inductor (L) can be determined [12], [13]. For these values, the sum of P loss and P ctrl is minimized.…”

Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

“…Assuming that the synchronization losses are suppressed (the control signals are properly timed) and that V ST V IN , the sum of P loss and P ctrl can be expressed as [12]:…”

Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

“…3) for different values of the input voltage. The information about the input voltage level can be obtained directly from the control block without any additional circuitry, as in most of the low power energy harvesting systems [6]- [8], [12], [13]. This is because the duration of the pMOS switch ON time, τ P , generated by the control block, is directly proportional to the input voltage.…”

Section: Implementation Of the Adaptive Sizesmentioning

confidence: 99%

“…It consists of an adaptive DC-DC core circuit and a control block. The system is based on the single-inductor dual-output (SIDO) boost converter presented in [12], but the DC-DC core circuit and the switch drivers are modified in order to utilize the proposed technique. The power transistors (switches) of the adaptive DC-DC core circuit are divided into multiple smaller subswitches (four in this particular case, M N 3:0 and M P 3:0 ).…”

Section: Introductionmentioning

confidence: 99%

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An adaptive FET sizing technique for high efficiency thermoelectric harvesters

Katic

Rodriguez

Rusu

2016

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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Abstract-A theoretical analysis of losses in low power thermoelectric harvester interfaces is used to find expressions for properly sizing the power transistors according to the input voltage level. These expressions are used to propose an adaptive FET sizing technique that tracks the input voltage level and automatically reconfigures the converter in order to improve its conversion efficiency. The performance of a low-power thermoelectric energy harvesting interface with and without the proposed technique is evaluated by circuit simulations under different input voltage/power conditions. The simulation results show that the proposed technique improves the conversion efficiency of the energy harvesting interface up to 12% at the lowest input voltage/power levels.

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Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

“…Assuming that the synchronization losses are suppressed (the control signals are properly timed) and that V ST V IN , the sum of P loss and P ctrl can be expressed as [12]:…”

Section: Losses Analysis At Low Voltage/power Levelsmentioning

confidence: 99%

Section: Implementation Of the Adaptive Sizesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An adaptive FET sizing technique for high efficiency thermoelectric harvesters

Katic

Rodriguez

Rusu

2016

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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SIDO: A single‐input double‐output energy harvesting architecture operating in burst mode with 74.87% peak end‐to‐end efficiency

Umaz

2021

Circuit Theory & Apps

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A single-input double-output (SIDO) energy harvesting architecture implemented with the off-the-shelf components is presented in this paper. The proposed SIDO consists of a step-up converter, a supercapacitor, an output routing control circuit (ORCC), and two output power switches for two loads. Once the supercapacitor charges to a maximum voltage level of nearly 3.7 V, output power switches are successively turned on by the ORCC for a short period of time (i.e., burst mode). The proposed SIDO supports output total power range from 2.694 to 196.76 mW which is in the range of 1.684 to 122.975 times greater than the maximum power available from the ambient energy source (e.g., 1.6 mW) due to the burst mode. Also, the proposed SIDO achieves a peak end-to-end efficiency of 74.87% with the self-starting, that is, no need of batteries other than the ambient energy source. As compared with prior work, the proposed SIDO supports the heaviest loads (e.g., total power of 196.76 mW) and achieves a wide support range with the burst mode operation and starts the operation from the lowest input voltage without the need of the external power source.

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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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A Dual-Output Thermoelectric Energy Harvesting Interface With 86.6% Peak Efficiency at 30 <inline-formula> <tex-math notation="LaTeX">$\mu {\text {W}}$ </tex-math> </inline-formula> and Total Control Power of 160 nW

Cited by 53 publications

References 19 publications

An adaptive FET sizing technique for high efficiency thermoelectric harvesters

An adaptive FET sizing technique for high efficiency thermoelectric harvesters

SIDO: A single‐input double‐output energy harvesting architecture operating in burst mode with 74.87% peak end‐to‐end efficiency

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

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