Modularity for Paralleling Different Rated Power Supplies Using Multi-Phase Switching Methods

Abstract

This paper proposes a modularity for paralleling different rated power supplies without adding a circuit in the feedback loop by using direct and overlapped switching methods. Unlike an isolated output diode, the use of an isolated output switch composed of two Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) can reduce power dissipation. The control module includes switches and a micro-programmed controlled unit that realizes the modularity by using multi-phase switching methods. The proposed module was studied, and experiments of two rated power supplies (60 and 45 W) were conducted to verify the studied results.

Keywords

• modularity
• current sharing
• different rated power
• paralleling
• control module
• isolated MOSFET
• multi-phase switching