Quasi-Parallel Switched-Capacitor and Regulating PWM DC-DC Converter

Datacenter power consumption makes up two percent of United States electricity consumption or 80TWhr. Roughly half of this energy is spent on cooling or lost in power conversion. Further as datacenters try to maximize compaction, the need for small and highly efficient power supplies is highlighted. Telecom power supplies often rely on large and lossy transformers to achieve large conversion ratios or to provide isolation for Quasi-Parallel or Sigma configurations. Low power switched capacitors converters can eliminate the large magnetic components and even provide ground isolation. Switched capacitor converters suffer from poor load regulation, poor line regulation, and discontinuous conversion ratios. Using a multilevel modular switched capacitor converter in a quasi-parallel structure, a lesser power rated regulating converter can provide load regulation and line regulation. This configuration can provide lightweight, efficient, and magnetic-less power.