A Fully Integrated Light-Powering System with Integrated CMOS Photovoltaic Cell for Batteryless IoT Devices

Chen, Po‐Han; Huang, Chaoyi; Cheng, Hao-Chung

doi:10.1109/icecs46596.2019.8965010

Cited by 4 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 13 , 24 ] integrate an energy monitor with a switch which separates the storage capacitor from the load, although in both cases reducing the efficiency below [ 12 ] and on the same order of magnitude of this work. However, both cases [ 13 , 24 ] are intended for outdoor use and are not optimized for a more restrictive indoor operation, as this work is. In terms of a silicon active area, this work presents a low active area comparing it with other circuits with the same node technology.…”

Section: Implementation and Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Power Management Unit for Solar Energy Harvester Assisted Batteryless Wireless Sensor Node

Lopez-Gasso

Beriain

Solar

et al. 2022

Sensors

View full text Add to dashboard Cite

This work describes an energy-efficient monolithic Power Management Unit (PMU) that includes a charge pump adapted to photovoltaic cells with the capability of charging a large supply capacitor and managing the stored energy efficiently to provide the required supply voltage and power to low energy consumption wireless sensor nodes such as RFID sensor tags. The proposed system starts-up self-sufficiently with a light source luminosity equal to or higher than 500 lux using only a 1.42 cm2 solar cell and integrating an energy monitor that gives the ability to supply autonomous sensor nodes with discontinuous operation modes. The system occupies an area of 0.97 mm2 with a standard 180 nm CMOS technology. The half-floating architecture avoids losses of charging the top/button plate of the stray capacitors in each clock cycle. Measurements’ results on a fabricated IC exhibit an efficiency above 60% delivering 13.14 μW over 1.8 V. The harvested energy is enough to reach the communication range of a standard UHF RFID sensor tag up to 21 m.

show abstract

Section: Implementation and Resultsmentioning

confidence: 99%

“…Ref. [ 13 ] integrates a photodiode on-chip as a solar cell for a full miniaturized system, although limiting its use only for outdoors. Ref.…”

Section: Introductionmentioning

confidence: 99%

Power Management Unit for Solar Energy Harvester Assisted Batteryless Wireless Sensor Node

Lopez-Gasso

Beriain

Solar

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…26th IEEE International Conference on Electronics, Circuits and Systems (ICECS). 2019 [2] presented a two-stage switched-capacitor dc-dc converter which controls the operating frequency as the loading condition varies to fit the output power. The system is fabricated in a 180-nm CMOS technology and includes a tiny photovoltaic cell integrated on the silicon die, as it can be seen in the Figure 2.11.…”

Section: Chapter 2 State Of the Artmentioning

confidence: 99%

“…The output power capability of this work under indoor light environments is high and in the same range as [1], which is considered the golden standard in terms of efficiency obtaining outstanding results in terms of efficiency; however, it requires a much higher input voltage than the circuit proposed in this work and does not include any kind of energy monitor or isolation of the stored energy to the load. On the other side, [2] and [3] integrate an energy monitor with a switch which separates the storage capacitor from the load, although in both cases reducing the efficiency below [1] and on the same order of magnitude of this work. However, both cases [2] and [3] are intended for outdoor use and are not optimized for a more restrictive indoor operation as this work is.…”

Section: Comparison With the Soamentioning

confidence: 99%

“…On the other side, [2] and [3] integrate an energy monitor with a switch which separates the storage capacitor from the load, although in both cases reducing the efficiency below [1] and on the same order of magnitude of this work. However, both cases [2] and [3] are intended for outdoor use and are not optimized for a more restrictive indoor operation as this work is.…”

Section: Comparison With the Soamentioning

confidence: 99%

See 1 more Smart Citation

Development of a low-power solar energy harvester PMU integrated circuit optimized for indoor environments.

Lopez-Gassó

View full text Add to dashboard Cite

Wireless electronic devices face a common and important constraint: the limited lifespan of their batteries. The concept of quasi-perpetual electronic devices, particularly for tiny and low-power electronic systems, is progressively becoming attainable. En-ergy harvesting can be the part of the solution by improving, attenuating or even eliminating this limitation by extending its autonomy. The ﬁnal goal is to convert them into a virtually perpetual system. Energy Harvesting can be deﬁned as the collection and storage of ambi-ent energy from the surroundings, to later convert it into electrical energy and use it to power a small and low-power electronic devices. These devices are often. The energy harvesting technique is intended to be used in devices where it is impractical or inconvenient to use traditional battery or grid power sources. Moreover, it have recently received more attention due to its in-creasing use in the Internet of Things (IoT) and the appearing of Wireless Sensor Networks (WSN). This work describes an energy-eﬃcient monolithic Power Management Unit (PMU) that includes a charge pump adapted to photovoltaic cells with the capability of charging a large supply capacitor and managing the stored energy eﬃciently to provide the required supply voltage and power to low energy consumption wireless sensor nodes such as RFID sensor tags. The proposed system starts-up self-suﬃciently with a light source lumi-nosity equal to or higher than 245 lux, meaning a voltage input of 595 mV using only a 1.42 cm2 solar cell. The result energy harvester integrates an energy monitor that gives the ability to supply autonomous sensor nodes with discontinuous operation modes. The full PMU occupies an area of 1.073 mm2 using a standard 180 nm CMOS technology. The half-ﬂoating architecture of the integrated charge pump avoids losses of charging the top/button plate of the stray capacitors in each clock cycle. Measurements’ results on a fabricated IC exhibit an an output power of 13.9 µW with 70.2 percent of peak-to-peak eﬃciency at indoor light conditions (680lux) with an output voltage of 2V.

show abstract

Switched Capacitors Charge Pump with half-floating Topology for a high-efficient Solar Energy Harvester

Lopez-Gasso

Beriain

Solar

et al. 2020

2020 XXXV Conference on Design of Circuits and Integrated Systems (DCIS)

View full text Add to dashboard Cite

A Fully Integrated Light-Powering System with Integrated CMOS Photovoltaic Cell for Batteryless IoT Devices

Cited by 4 publications

References 8 publications

Power Management Unit for Solar Energy Harvester Assisted Batteryless Wireless Sensor Node

Power Management Unit for Solar Energy Harvester Assisted Batteryless Wireless Sensor Node

Development of a low-power solar energy harvester PMU integrated circuit optimized for indoor environments.

Switched Capacitors Charge Pump with half-floating Topology for a high-efficient Solar Energy Harvester

Contact Info

Product

Resources

About