A Communication Protocol With Data Compression for Isolated Digital Power Supplies

High-cost isolators and their speed limits are the shortcomings of digital control in isolated power supplies. Different feedback schemes result in different numbers and speed requirements of the isolators, which impact the cost and the decision making. This paper compares existing solutions, and proposes a communication solution featuring data compression and time-division multiplexing, which provides the highest output accuracy and many advanced features of digital control, whereas the cost can potentially be in the range of conventional analog solutions.