The NCP4390DR2G is a highly integrated advanced secondary side LLC resonant converter controller with synchronous rectifier control from ON Semiconductor. Its features include a primary side MOSFET driver, a synchronous MOSFET gate driver, an advanced gate drive optimized for LLCs, a wide operating range from 6 to 70 V, twice the startup current than traditional controllers, and a wide range of integration options. It is optimized to increase efficiency by between 0.3 to 1.5%, thanks to its advanced resonant converters. The NCP4390DR2G also offers overcurrent protection and programmable off-time control with a hysteretic operating current regulation, allowing for better EMI/RFI compliance. Additionally, the NCP4390DR2G supports up to 96% operating efficiencies, and is designed to improve system performance while meeting stringent efficiency requirements.