Details
| Original language | English |
|---|---|
| Pages (from-to) | 581-591 |
| Number of pages | 11 |
| Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
| Volume | 6 |
| Issue number | 2 |
| Early online date | 25 Jan 2018 |
| Publication status | Published - Jun 2018 |
Abstract
The maintenance issue of batteries and the limited power level of energy harvesting is addressed by the presented integrated micropower supply. Connected to the 120/230- VRMS mains, it provides a 3.3-V ac output voltage, suitable for applications such as the Internet-of-Things and smart homes. The micropower supply consists of a fully integrated ac-dc and dc-dc converter with one external low-voltage surface mount device buffer capacitor, resulting in an extremely compact size. Fabricated in a low-cost 0.35- μm700 -V complimentary metal-oxide-semiconductor technology, it covers a die size of 7.7 mm2. The ac-dc converter is a direct coupled, full-wave rectifier with a subsequent series regulator. The dc-dc stage is a fully integrated capacitive 4:1 converter with up to 17-V input and 47.4% peak efficiency. The power supply comprises several high-voltage control circuits including level shifters and various types of charge pumps (CPs). A source-supplied CP is utilized that supports a varying switching node potential. The overall losses are discussed and optimized, including flying capacitor bottom-plate losses. The power supply achieves an output power of 3 mW, resulting in a power density of 390 μWmm2. This exceeds prior art by a factor of 11.
Keywords
- ac-dc power converters, charge pumps (CPs), dc-dc power converters, power supplies, switched capacitor (SC) circuits
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 6, No. 2, 06.2018, p. 581-591.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An Integrated 3-mW 120/230-V AC Mains Micropower Supply
AU - Lutz, Daniel
AU - Renz, Peter
AU - Wicht, Bernhard
N1 - © 2018 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - The maintenance issue of batteries and the limited power level of energy harvesting is addressed by the presented integrated micropower supply. Connected to the 120/230- VRMS mains, it provides a 3.3-V ac output voltage, suitable for applications such as the Internet-of-Things and smart homes. The micropower supply consists of a fully integrated ac-dc and dc-dc converter with one external low-voltage surface mount device buffer capacitor, resulting in an extremely compact size. Fabricated in a low-cost 0.35- μm700 -V complimentary metal-oxide-semiconductor technology, it covers a die size of 7.7 mm2. The ac-dc converter is a direct coupled, full-wave rectifier with a subsequent series regulator. The dc-dc stage is a fully integrated capacitive 4:1 converter with up to 17-V input and 47.4% peak efficiency. The power supply comprises several high-voltage control circuits including level shifters and various types of charge pumps (CPs). A source-supplied CP is utilized that supports a varying switching node potential. The overall losses are discussed and optimized, including flying capacitor bottom-plate losses. The power supply achieves an output power of 3 mW, resulting in a power density of 390 μWmm2. This exceeds prior art by a factor of 11.
AB - The maintenance issue of batteries and the limited power level of energy harvesting is addressed by the presented integrated micropower supply. Connected to the 120/230- VRMS mains, it provides a 3.3-V ac output voltage, suitable for applications such as the Internet-of-Things and smart homes. The micropower supply consists of a fully integrated ac-dc and dc-dc converter with one external low-voltage surface mount device buffer capacitor, resulting in an extremely compact size. Fabricated in a low-cost 0.35- μm700 -V complimentary metal-oxide-semiconductor technology, it covers a die size of 7.7 mm2. The ac-dc converter is a direct coupled, full-wave rectifier with a subsequent series regulator. The dc-dc stage is a fully integrated capacitive 4:1 converter with up to 17-V input and 47.4% peak efficiency. The power supply comprises several high-voltage control circuits including level shifters and various types of charge pumps (CPs). A source-supplied CP is utilized that supports a varying switching node potential. The overall losses are discussed and optimized, including flying capacitor bottom-plate losses. The power supply achieves an output power of 3 mW, resulting in a power density of 390 μWmm2. This exceeds prior art by a factor of 11.
KW - ac-dc power converters
KW - charge pumps (CPs)
KW - dc-dc power converters
KW - power supplies
KW - switched capacitor (SC) circuits
UR - http://www.scopus.com/inward/record.url?scp=85041015163&partnerID=8YFLogxK
U2 - 10.1109/jestpe.2018.2798504
DO - 10.1109/jestpe.2018.2798504
M3 - Article
AN - SCOPUS:85041015163
VL - 6
SP - 581
EP - 591
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
SN - 2168-6777
IS - 2
ER -