This reference design is a a control card for LLC converter. It integrates all of the essential functions for controlling a LLC converter including the HV start-up: X-capacitor discharge and the drivers for the power FETs. By employing the advanced burst mode: it can also help the LLC converter to achieve ultra low standby power even with PFC on. Furthermore: PMP40281 is very flexible for user to evaluate and suitable for any power rating of a LLC power board. It is easy to set up bench test with existing power stage by simple connections.