The UCC25640xis a fully featured LLC controller with integrated high-voltage gate driver. It has been designedto pair with a PFC controller to provide a complete power system using a minimum of externalcomponents. The resulting power system is designed to meet the most stringent requirements forstandby power without the need for a separate standby power converter.
UCC25640x provides a highly efficient burst mode with soft-on and soft-off periods tominimize audible noise at standby operation. The burst power level and hysteresis are programmable,simplifying the optimization of efficiency and burst mode operation. Burst mode can also bedisabled through pin configuration. UCC25640x uses hybrid hysteretic control to provide best inclass line and load transient response.
UCC25640x includes a range of features designed to make LLC converter operation wellcontrolled and protected. It can be used with UCC28056 or UCC28064A PFC controllers, along withUCC24624 synchronous rectifier controller to offer a complete power supply solution.