Digital Zero-Current Switching Lock-In Controller IC for Optimized Operation of Resonant SCC

摘要: This article introduces a lock-in integrated controller for resonant switched-capacitor converter (SCC). The identifies the period of each subcircuit on-the-fly and locks-in to correct switching time fully utilize charge transfer rate flying capacitor. various modules are detailed, including autotuner sequencer, which accommodate any mismatch, variations or drifts component values circuit configuration. (IC) has been designed fabricated on 0.18 μm 5 V process resulting in effective silicon area 0.64 mm2. Experimental results IC operating closed-loop provided, demonstrating accurate two resonators with individual independent characteristics. A full-scale hardware prototype 650 W 4:1 switched-tank-converter is used validate controller's operation, excellent capabilities high efficiency up 98.6%.