TY - JOUR
T1 - A Family of Ladder Multi-Resonant Switched-Capacitor Converters With Extended Voltage Gain Range and Complete Soft Charging
AU - Zhang, Ningning
AU - Ding, Wei
AU - Yang, Peng
AU - Li, Qian
AU - Zhang, Guoju
AU - Li, Shouxiang
N1 - Publisher Copyright:
© 2023 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
PY - 2023
Y1 - 2023
N2 - In this paper, a family of Ladder multi-resonant switched-capacitor converters (MRSCC) is proposed to deal with the issues of a high transient current spike, inherent capacitor charge sharing loss, hard-switched operation, and inability for lossless voltage regulation for traditional Ladder switched-capacitor converters (SCC). By incorporating a multi-resonant core (MRC) and adopting the on-time fixed frequency modulation, a “charge balance” state with overlapped resonant currents is introduced. Consequently, the conversion ratio of the Ladder MRSCC can be regulated continuously, widely, and efficiently, even at light load conditions. In addition, all transistors achieve zero-current-switching (ZCS) turn-on, and all diodes obtain ZCS turn-off. The complete soft-charging operation between capacitors is obtained, eliminating the high transient current spike and charge-sharing loss effectively. In addition, the synchronous Ladder MRSCC with a clamp circuit is proposed to further eliminate the high-frequency ringing and reduce the conduction loss, which makes it potentially applicable to compact applications, including power supplies for portable devices and panel-level photovoltaic systems. A comprehensive analysis of different operation modes, boundary conditions, component stress, topology implementation, and topology comparison is presented to assist converter operation and hardware design. A 55W prototype with the 3X Ladder MRSCC was developed to verify the effectiveness of the proposed topology, modulation strategy, and circuits.
AB - In this paper, a family of Ladder multi-resonant switched-capacitor converters (MRSCC) is proposed to deal with the issues of a high transient current spike, inherent capacitor charge sharing loss, hard-switched operation, and inability for lossless voltage regulation for traditional Ladder switched-capacitor converters (SCC). By incorporating a multi-resonant core (MRC) and adopting the on-time fixed frequency modulation, a “charge balance” state with overlapped resonant currents is introduced. Consequently, the conversion ratio of the Ladder MRSCC can be regulated continuously, widely, and efficiently, even at light load conditions. In addition, all transistors achieve zero-current-switching (ZCS) turn-on, and all diodes obtain ZCS turn-off. The complete soft-charging operation between capacitors is obtained, eliminating the high transient current spike and charge-sharing loss effectively. In addition, the synchronous Ladder MRSCC with a clamp circuit is proposed to further eliminate the high-frequency ringing and reduce the conduction loss, which makes it potentially applicable to compact applications, including power supplies for portable devices and panel-level photovoltaic systems. A comprehensive analysis of different operation modes, boundary conditions, component stress, topology implementation, and topology comparison is presented to assist converter operation and hardware design. A 55W prototype with the 3X Ladder MRSCC was developed to verify the effectiveness of the proposed topology, modulation strategy, and circuits.
KW - DC-DC power conversion
KW - Ladder circuits
KW - Resonant power conversion
KW - circuit optimization
KW - switched capacitor circuits
UR - http://www.scopus.com/inward/record.url?scp=85176380548&partnerID=8YFLogxK
U2 - 10.1109/TIA.2023.3327223
DO - 10.1109/TIA.2023.3327223
M3 - Article
AN - SCOPUS:85176380548
SN - 0093-9994
VL - 60
SP - 2852
EP - 2869
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 2
ER -