  This paper presents a Direct Mapped Method (DMM) for real-time simulation of
high switching frequency resonant converters. The DMM links state variables to
diode statuses and provides an exact and noniterative solution to network
equations. The proposed method is implemented on FPGA to simulate an LLC
converter with switching frequencies ranging up to 500 kHz. The best reported
implementations of DMM achieve a 25 ns simulation time-step for a wide range of
clock frequencies, ranging from 40 MHz to 320 MHz.
