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.
|Title of host publication||Proceedings of 4 th IEEE International Future Energy Electronics Conference|
|Number of pages||8|
|Publication status||Published - 2019|
|Event||4th IEEE International Future Energy Electronics Conference - Parkroyal on Beach Road, Singapore, Singapore|
Duration: 25 Nov 2019 → 28 Nov 2019
|Conference||4th IEEE International Future Energy Electronics Conference|
|Location||Parkroyal on Beach Road|
|Period||25/11/2019 → 28/11/2019|
- Battery chargers
- Switched mode power supplies
- Analog integrated circuit
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.