High-accuracy digital controlled isolated power supply with low data transfer requirements

In this paper, a digital controlled isolated power supply system is developed combing an 8B/10B-based protocol and a Multi-Resolution Feedback (MRF) method to achieve optimized communication. It features 4 times higher output accuracy and averagely consumes less than a half bandwidth than existing systems, and transmits all data using a single pulse-transformer, which saves substantial cost of high-speed isolators. Experimental results demonstrate the feasibility of the proposed system.