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This paper presents a general small-signal model of paralleled DC/DC modules with current sharing control. With this general small-signal model, the control mode inside each single DC/DC converter doesn't need to be considered any more, hence the analysis on small-signal stability and output impedance can be simplified. A design example of two 1V/20A parallel modules is presented and experimental results verify the performance of current sharing.

This paper proposes the control loop design for the three-loop voltage regulator (VR) to achieve adaptive voltage position control. A y-parameters model for the VR with current-mode controlled active droop method is introduced to simplify the original three-loop system to a two-loop system. Therefore the compensation network design becomes much simple. Following the theoretical analysis, simulation and experimental results demonstrate very good VR transient response.