A Two-stage Universal Input Charger with Wide Output Voltage Range

Author(s)
Ranjram, Mike K; Zhang, Cheng; Perreault, David J
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Abstract
© 2019 IEEE. This paper presents the design of a two-stage 50W portable charger architecture with universal ac input and 5V/25W, 9V/45W, 12V/50W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2MHz enables a 47% reduction in the buffer capacitor volume 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.
Date issued
2019
URI
https://hdl.handle.net/1721.1/138059
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Ranjram, Mike K, Zhang, Cheng and Perreault, David J. 2019. "A Two-stage Universal Input Charger with Wide Output Voltage Range." 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019.
Version: Author's final manuscript
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