Fast and Stable Control Method for a Boost-forward DC-DC Converter

In this paper, by applying a control method called power balance mode control (PBMC) to a boost-forward DC-DC converter, we realized a highly stable and responsive converter. The effectiveness of the proposed method was verified using a 48V-100V boost-forward DC-DC converter. From the frequency characteristics of the loop gain, it was confirmed that the PBMC has a larger phase margin and better control stability than conventional control methods. From the load transient-response waveforms, it was confirmed that the PBMC was superior to the conventional control method in both the short settling time to the target value and the small output-voltage fluctuation.