Presentation Description: This proposal presents a design for a simple, resonant transformer DC-DC converter using an off-the-shelf gate driver which is suitable for many high voltage applications. The resonant converter is an LLC circuit formed using the inherent parasitic inductance and capacitance of the transformer. This allows the design to have a smaller size due to the smaller magnetic. The gate driver is used to provide the switching power to the transformer rather than a typical bridge switching circuit and a variable buck converter is used to control the voltage to the driver. A microcontroller is used to operate the circuit components, allowing the transformer output to be easily adjusted. This allows the transformer to produce a wide range of output voltages by adjusting the input voltage amplitude and frequency. The performance of the design is tested in an ozone generator connected to a Villard multiplier circuit. During testing the resonant design was compared to a typical flyback design. The resonant circuit can be operated at a higher switching frequency than the flyback while giving a stable high voltage output that also has lower electromagnetic emissions.