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The LLC converter in this Evaluation Board (EVB) is controlled by the FAN7688; it’s a 16-pin controller and locates in secondary side. The FAN7688 includes PFM and PWM controls to optimization efficiency for all loading, its combine advantage SR control improves efficiency. It employs a current mode control technique based on charge control; this provides a better control-to-output and line-to-output transfer function of the power stage, simplifying the feedback loop design while allowing true input power limit capability. The PFC is controlled by the FAN6982, based on Continuous Conduction Mode (CCM), which employs leading edge modulation for average current control and has a number of advanced features for better performance and reliability.