An efficient communication protocol for single- and multi-module isolated digital power supplies using a single pulse-transformer

In this paper, an 8B/10B-based protocol is developed to optimize communications for single- and multi-module isolated digital power supplies. The protocol allows multiplexed feedback communications which transmits the feedback data of multiple power stages using a single pulse-transformer, which saves substantial cost of high-speed isolators. The protocol consumes less bandwidth than existing protocols. Experimental results of a prototype demonstrate the feasibility of the proposed system.