TY - JOUR
T1 - Analysis of High-Power Switched-Capacitor Converter Regulation Based on Charge-Balance Transient-Calculation Method
AU - Wu, Bin
AU - Li, Shouxiang
AU - Smedley, Keyue Ma
AU - Singer, Sigmond
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2016/5
Y1 - 2016/5
N2 - Switched-capacitor (SC) converters were initially introduced for low-power applications and monolithic integration. In recent years, SC converter has found high-power applications. However, voltage regulation remains an issue. This paper addresses regulation challenges for high-power SC converters, based on charge-balance transient-calculation (CT) modeling method and peak current stress estimation. With the help of CT model, due to its accuracy and comprehensive relationship, circuit and control parameters' impacts on regulation become straightforward and concerns on components stresses can be addressed quantitatively. The suitability of CT method for regulation analysis is confirmed by comparison with traditional modeling methods. The CT method is used in a 1-kW 3X two-switch boosting switched-capacitor converter (TBSC) circuit for steady-state analysis and current stress estimation. The soft rising input current and nature interleaving properties of 3X TBSC make it well suited for high-power application. Finally, the small-signal model of the 3X TBSC is developed and a closed-loop operation is achieved under 1 kW power rating.
AB - Switched-capacitor (SC) converters were initially introduced for low-power applications and monolithic integration. In recent years, SC converter has found high-power applications. However, voltage regulation remains an issue. This paper addresses regulation challenges for high-power SC converters, based on charge-balance transient-calculation (CT) modeling method and peak current stress estimation. With the help of CT model, due to its accuracy and comprehensive relationship, circuit and control parameters' impacts on regulation become straightforward and concerns on components stresses can be addressed quantitatively. The suitability of CT method for regulation analysis is confirmed by comparison with traditional modeling methods. The CT method is used in a 1-kW 3X two-switch boosting switched-capacitor converter (TBSC) circuit for steady-state analysis and current stress estimation. The soft rising input current and nature interleaving properties of 3X TBSC make it well suited for high-power application. Finally, the small-signal model of the 3X TBSC is developed and a closed-loop operation is achieved under 1 kW power rating.
KW - CT modeling
KW - peak current stress
KW - switched capacitor (SC)
KW - two-switch boosting switched-capacitor converter (TBSC)
KW - voltage regulation
UR - https://www.scopus.com/pages/publications/84961914073
U2 - 10.1109/TPEL.2015.2466095
DO - 10.1109/TPEL.2015.2466095
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AN - SCOPUS:84961914073
SN - 0885-8993
VL - 31
SP - 3482
EP - 3494
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 5
M1 - 7182330
ER -