ON Semiconductor's NCP43080 is a synchronous rectifier controller for switch mode power supplies. The controller enables high efficiency designs for flyback, quasi-resonant flyback, and LLC topologies. Externally adjustable minimum off-time and on-time blanking periods provide flexibility to drive various MOSFET package types and PCB layout. A reliable and noise-less operation of the SR system is insured due to the self-synchronization feature. The NCP43080 also utilizes kelvin connection of the driver to the MOSFET to achieve high efficiency operation at full load. The precise turn-off threshold, extremely low turn-off delay time, and high sink current capability of the driver allow the maximum synchronous rectification MOSFET conduction time. The high accuracy driver and 5 V gate clamp make it ideally suited for directly driving GaN devices.