Here is a LLC DC DC converter reference design from Microchip using dsPIC digital signal processing capabilities for control.
As presented in this application note, resonant converters, LLC resonant converters in particular, have all of the features mentioned above, resulting in a compact and highly efficient design. Their ability to keep the output voltage regulated, over a very wide input voltage range, contributes to reducing the overall system cost. The relatively simple architecture of these parts permits the implementation of control and supervision/management tasks with a small pin count dsPIC DSC from Microchip. Sophisticated control is possible, using the DSP capabilities of dsPIC DSC devices.