Modified Fibonacci Switched Capacitor Converter with Reduced Switch Stress and Increased Efficiency

Abstract

Researchers at the University of California, Davis have developed a technology that introduces an alternative topology for Fibonacci switched-capacitor converters that significantly reduces switch losses and improves efficiency.

Full Description

This technology modifies the wiring connections of a conventional Fibonacci switched-capacitor converter to create an alternative configuration. By changing one switch connection per capacitor, it achieves a reduction in losses and an increase in efficiency without needing additional parts. This alternative topology can maintain the same conversion ratio as the conventional approach in both step-up and step-down configurations, while offering up to a 38% reduction in total switch losses and enhanced efficiency.

Applications

• DC-DC converters for 48 Volt to point-of-load applications. 
• Systems requiring minimal Electromagnetic Interference (EMI) and high-power density. 
• Applications demanding full integration and fixed output voltage ratios.

Features/Benefits

• Significant reduction in switch losses. 
• Increased efficiency compared to conventional Fibonacci converters. 
• No additional parts are required, only a modification of wiring connections. 
• Maintains the same conversion ratio in both step-up and step-down configurations. 
• Less switch stress, leading to potentially longer component lifespan.

Patent Status

Patent Pending