TY - GEN
T1 - Analysis of switched-capacitor DC-DC converters in soft-charging operation
AU - Lei, Yutian
AU - Pilawa-Podgurski, Robert C.N.
PY - 2013
Y1 - 2013
N2 - This paper formulates a formal analysis method for switched-capacitor (SC) dc-dc converters in soft-charging operation. Through soft-charging, the charging/discharging loss of a SC converter can be minimized or even eliminated by allowing the output voltage to vary to a greater extent. Usually a soft-charging SC converter is followed by a magnetic converter for ripple reduction and better regulation. For any given two-phase switched-capacitor topology, the proposed method can be used to determine whether soft-charging is at all possible and if so, the required capacitor sizes to achieve soft-charging. The proposed method also gives the resultant output voltage ripple due to soft-charging operation. A number of different topologies are analyzed, including Dickson, Series-parallel, Ladder, Fibonacci and Doubler configurations. The analysis gives insights regarding the expected improvement in performance when these topologies are cascaded by a magnetic converter. Through comparison to simulated results and existing work, the validity of the proposed method is confirmed.
AB - This paper formulates a formal analysis method for switched-capacitor (SC) dc-dc converters in soft-charging operation. Through soft-charging, the charging/discharging loss of a SC converter can be minimized or even eliminated by allowing the output voltage to vary to a greater extent. Usually a soft-charging SC converter is followed by a magnetic converter for ripple reduction and better regulation. For any given two-phase switched-capacitor topology, the proposed method can be used to determine whether soft-charging is at all possible and if so, the required capacitor sizes to achieve soft-charging. The proposed method also gives the resultant output voltage ripple due to soft-charging operation. A number of different topologies are analyzed, including Dickson, Series-parallel, Ladder, Fibonacci and Doubler configurations. The analysis gives insights regarding the expected improvement in performance when these topologies are cascaded by a magnetic converter. Through comparison to simulated results and existing work, the validity of the proposed method is confirmed.
UR - https://www.scopus.com/pages/publications/84889067122
UR - https://www.scopus.com/pages/publications/84889067122#tab=citedBy
U2 - 10.1109/COMPEL.2013.6626416
DO - 10.1109/COMPEL.2013.6626416
M3 - Conference contribution
AN - SCOPUS:84889067122
SN - 9781467349161
T3 - 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013
BT - 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013
T2 - 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics, COMPEL 2013
Y2 - 23 June 2013 through 26 June 2013
ER -