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Subtraction-Mode Switched-Capacitor Converters With Parasitic Loss Reduction.
- Source :
- IEEE Transactions on Power Electronics; Feb2020, Vol. 35 Issue 2, p1200-1204, 5p
- Publication Year :
- 2020
-
Abstract
- In this letter, subtraction-mode switched-capacitor (SC) converters are proposed and analyzed. When compared to a conventional summation-mode SC converter, some of the flying capacitors of the subtraction-mode SC converters have reduced voltage swings, and hence the switching loss of the corresponding positive- and negative-plate parasitic capacitors is reduced, and efficiency is enhanced. The proposed subtraction-mode topologies use the same number of flying capacitors and switches as the summation-mode topologies, and they are reconfigured without using any auxiliary circuits, so there are no tradeoffs in terms of power density, cost, voltage conversion ratio (VCR), or equivalent output resistance. A test chip with VCRs of 1/3×, 2/3×, 3/4×, and 4/5× was fabricated in a 65-nm CMOS process. Efficiency improvement of more than 10% was achieved when compared to summation-mode designs. [ABSTRACT FROM AUTHOR]
- Subjects :
- CAPACITOR switching
POWER density
CAPACITORS
Subjects
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 35
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 139786071
- Full Text :
- https://doi.org/10.1109/TPEL.2019.2933623