Point-of-Load (PoL) and Multi-Phase Converters
Technical Lecture Session
DC-DC Converters for Data Centers
DC-DC power conversion, Hybrid switched capacitor circuit, linear extendable group operated (LEGO) architecture, Point of load (PoL) converter
This paper presents a merged-two-stage hybrid-switched-capacitor converters with a Linear Extendable Group Operated Point-of-Load (LEGO-PoL) architecture for high current microprocessors. The proposed LEGO-PoL converter leverages the advantages of switched-capacitor circuits and multiphase buck circuits and can achieve soft charging, current sharing, and voltage balancing. The voltage balancing and current sharing mechanisms of the LEGO-PoL architecture are investigated in detail. A 450 W, 48 V-1.5 V, 300 A LEGO-PoL converter with a peak efficiency of 96%, a full load efficiency of 87.7%, and a power density of 577 W/in3 was built and tested to verify the effectiveness of the LEGO-PoL architecture.