Design of an H∞ robust controller for multi-module parallel DC-DC buck converters with average current mode control

This paper presents the design of an H_∞ robust controller for multi-module parallel DC-DC converters operating in continuous conduction mode (CCM) to improve stability and robustness. The framework was based on average current mode control (ACC) scheme for a load-sharing converter system. Simulation results have shown that the proposed system can obtain the stability and robustness. Moreover, it can give fast dynamic responses, good output regulation and equal current distribution. This design can be implemented in the proposed multi-module converter system.