TY - GEN
T1 - Resonant switched capacitor converter with high efficiency
AU - Shoyama, Masahito
AU - Naka, Toshiyuki
AU - Ninomiya, Tamotsu
PY - 2004/11/29
Y1 - 2004/11/29
N2 - Conventional switched capacitor converters have an inherent drawback that their efficiency is much decreased as the output current is increased. This inherent drawback is due to a periodical forced charging and discharging operation in the internal switched capacitors accompanied by a large capacitor current, so that their efficiency can not be increased by decreasing its internal resistance. As a result, conventional switched capacitor converters have been limited to be used with a very small output current. This paper presents some novel switched capacitor converter topologies that use a resonant operation instead of the forced charging and discharging operation. Their advantage over conventional switched capacitor converters is a high efficiency even in a high output current region. The operation analysis and steady-state characteristics are described in detail for a half buck type switched capacitor converter, and they are confirmed by experiments.
AB - Conventional switched capacitor converters have an inherent drawback that their efficiency is much decreased as the output current is increased. This inherent drawback is due to a periodical forced charging and discharging operation in the internal switched capacitors accompanied by a large capacitor current, so that their efficiency can not be increased by decreasing its internal resistance. As a result, conventional switched capacitor converters have been limited to be used with a very small output current. This paper presents some novel switched capacitor converter topologies that use a resonant operation instead of the forced charging and discharging operation. Their advantage over conventional switched capacitor converters is a high efficiency even in a high output current region. The operation analysis and steady-state characteristics are described in detail for a half buck type switched capacitor converter, and they are confirmed by experiments.
UR - http://www.scopus.com/inward/record.url?scp=8744289763&partnerID=8YFLogxK
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U2 - 10.1109/PESC.2004.1355143
DO - 10.1109/PESC.2004.1355143
M3 - Conference contribution
AN - SCOPUS:8744289763
SN - 0780383990
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 3780
EP - 3786
BT - 2004 IEEE 35th Annual Power Electronics Specialists Conference, PESC04
T2 - 2004 IEEE 35th Annual Power Electronics Specialists Conference, PESC04
Y2 - 20 June 2004 through 25 June 2004
ER -