Controller Chip Design of Dual-Clamped-Voltage Coupled-Inductor Switched-Capacitor Converter

In this work, the design and implementation of the controller chip is presented and applied to dual-clamped-voltage coupled-inductor switched-capacitor (DCISC) converter for step-up DC-DC conversion. In this system, the plant (i.e., power part) is composed of DCI booster and three-stage SC doubler, so as to attain the high-gain power conversion from DC 12V to DC 500V. In order to achieve the target, the controller (i.e., control part) is made up of non-overlapping circuit and pulse-width-modulation (PWM) block, and its chip internal circuit is designed in Cadence through pre/post-layout procedures. Then, with the assistance of Chip Design and Implementation Center (CIC), the controller is implemented on an IC chip: no. D35-106D-E0001, TSMC 0.35μm 2P4M, 1500×1500μm
²
, 3.3V, 2.763mW, max frequency 50kHz, 18S/B. At the end, the prototype circuit of DCISC is realized, and also some experimental cases of high-gain DC-DC conversion are illustrated to show the practicality.