Cascaded Switched-Capacitor dc-dc Converters for a USB Power Delivery Compliant Charger

Jacob E. F. Overgaard, Jens Christian Hertel, Tiberiu-Gabriel Zsurzsan, Zhe Zhang

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Abstract

The improvements in modern circuit technology reduce system size, improve the efficiency and reduce the cost. Utilization of soft-switching resonant power converters give high density high effeciency power converters for narrow output voltage ranges. To overcome this a cascaded switched-capacitor dc-dc converter is used to implement a Universal Serial Bus Power Delivery compliant charger. The converter uses a custom designed application specific integrated circuit designed for switched-capacitor dc-dc converters and wide bandgap technology allowing high frequency, high power design. The converter achieves peak efficiencies up to 98 % at 60 W output power with a corresponding junction temperature of 50 ◦C. Worst case junction temperatures reach 64 ◦C and is viable for use in longterm battery charger systems. The cascaded power stages take up 14 mm × 22 mm.
Original languageEnglish
Title of host publicationProceedings of 4 th IEEE International Future Energy Electronics Conference
Number of pages8
PublisherIEEE
Publication date2019
ISBN (Print)978-1-7281-3153-5
Publication statusPublished - 2019
Event4th IEEE International Future Energy Electronics Conference - Parkroyal on Beach Road, Singapore, Singapore
Duration: 25 Nov 201928 Nov 2019
http://www.ifeec.tw/

Conference

Conference4th IEEE International Future Energy Electronics Conference
LocationParkroyal on Beach Road
CountrySingapore
CitySingapore
Period25/11/201928/11/2019
Internet address

Keywords

  • Battery chargers
  • Switched mode power supplies
  • ASIC
  • Analog integrated circuit

Cite this

Overgaard, J. E. F., Hertel, J. C., Zsurzsan, T-G., & Zhang, Z. (2019). Cascaded Switched-Capacitor dc-dc Converters for a USB Power Delivery Compliant Charger. In Proceedings of 4 th IEEE International Future Energy Electronics Conference IEEE.