TY - JOUR
T1 - Digital Zero-Current Switching Lock-In Controller IC for Optimized Operation of Resonant SCC
AU - Urkin, Tom
AU - Sovik, Guy
AU - Masandilov, Erez Erzol
AU - Peretz, Mor Mordechai
N1 - Funding Information:
Manuscript received May 11, 2020; revised August 5, 2020; accepted September 26, 2020. Date of publication October 9, 2020; date of current version January 22, 2021. This work was supported in part by the Israel Science Foundation under Grant 2186/19 and in part by the Vishay Ltd., Siliconix IC division. Recommended for publication by Associate Editor M. Rodriguez. (Corresponding author: Mor Mordechai Peretz.) The authors are with the Center for Power Electronics and Mixed-Signal IC, Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel (e-mail: tomur@post.bgu.ac.il; sovik@post.bgu.ac.il; masander@post.bgu.ac.il; morp@bgu.ac.il).
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - This article introduces a lock-in integrated controller for resonant switched-capacitor converter (SCC). The controller identifies the resonant period of each subcircuit on-the-fly and locks-in to the correct switching time to fully utilize the charge transfer rate for each flying capacitor. The various modules of the controller are detailed, including the autotuner and sequencer, which accommodate any mismatch, variations or drifts of component values or circuit configuration. The integrated circuit (IC) has been designed and fabricated on a 0.18 μm 5 V process resulting in effective silicon area of 0.64 mm2. Experimental results of the controller IC operating in closed-loop are provided, demonstrating accurate lock-in for two resonators with individual independent resonant characteristics. A full-scale hardware prototype of 650 W 4:1 switched-tank-converter is used to validate the controller's operation, demonstrating excellent lock-in capabilities resulting in high efficiency of up to 98.6%.
AB - This article introduces a lock-in integrated controller for resonant switched-capacitor converter (SCC). The controller identifies the resonant period of each subcircuit on-the-fly and locks-in to the correct switching time to fully utilize the charge transfer rate for each flying capacitor. The various modules of the controller are detailed, including the autotuner and sequencer, which accommodate any mismatch, variations or drifts of component values or circuit configuration. The integrated circuit (IC) has been designed and fabricated on a 0.18 μm 5 V process resulting in effective silicon area of 0.64 mm2. Experimental results of the controller IC operating in closed-loop are provided, demonstrating accurate lock-in for two resonators with individual independent resonant characteristics. A full-scale hardware prototype of 650 W 4:1 switched-tank-converter is used to validate the controller's operation, demonstrating excellent lock-in capabilities resulting in high efficiency of up to 98.6%.
KW - Integrated circuit
KW - resonant converter
KW - soft switching
KW - switched capacitor
KW - zero current switching (ZCS)
UR - http://www.scopus.com/inward/record.url?scp=85100580039&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2020.3029976
DO - 10.1109/TPEL.2020.3029976
M3 - Article
AN - SCOPUS:85100580039
SN - 0885-8993
VL - 36
SP - 5985
EP - 5996
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 5
M1 - 9219146
ER -