TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Lutz, Daniel
A1  - Renz, Peter
A1  - Wicht, Bernhard
T1  - An integrated 3-mW 120/230-V AC mains micropower supply
JF  - IEEE journal of emerging and selected topics in power electronics
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-μm 700-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 μW/mm². 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 circuits
Y1  - 2018
SN  - 2168-6777
SS  - 2168-6777
U6  - https://doi.org/10.1109/JESTPE.2018.2798504
DO  - https://doi.org/10.1109/JESTPE.2018.2798504
VL  - 6
IS  - 2
SP  - 581
EP  - 591
S1  - 11
PB  - IEEE
CY  - New York, NY
ER  -