onsemi NCP4318 Synchronous Rectification Controllers

onsemi NCP4318 Synchronous Rectification Controllers are designed for LLC resonant converters with minimum external components. The controllers have a two-gate driver stage for driving the SR MOSFETs which are rectifying the outputs of the secondary transformer windings. The two gate driver stages have their own Drain and Source sensing inputs and operate independently of each other. The advanced adaptive dead-time control compensates a voltage across parasitic inductance to minimize the body diode conduction and maximize the system efficiency. The advanced turn-off control algorithm allows stable SR operation over the entire load range. NCP4318 has two versions of pin assignment, NCP4318AXX, NCP4318BXX.