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A Two-Stage Universal Input Charger With Wide Output Voltage Range

Author(s)
Ranjram, Mike Kavian; Zhang, Cheng; Perreault, David J
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Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/
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Abstract
This article presents the design of a two-stage 50 W portable charger architecture with universal ac input and 5 V/25 W, 9 V/45 W, 12 V/50 W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2 MHz enables a 59% reduction in buffer capacitor volume compared to an example electrolytic capacitor while a stacked-bridge LLC converter with a Variable-Inverter-Rectifier-Transformer (VIRT) offers greater than 96% efficiency across the wide output voltage range. The design demonstrates the potential and trade-offs of a two-stage architecture at this operating power and illustrates the benefits of the utilized power stage topologies in achieving both small size and high efficiency over wide input- and output voltage ranges.
Date issued
2020-03
URI
https://hdl.handle.net/1721.1/130047
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
IEEE Open Journal of Power Electronics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Ranjram, Mike K. et al. "A Two-Stage Universal Input Charger With Wide Output Voltage Range." IEEE Open Journal of Power Electronics 1 (March 2020): 88 - 102.
Version: Final published version
ISSN
2644-1314

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