FEBFAN7688SJXA-CP14U306-GEVB:306 W/12 V PC Application with 12 VSB Module Evaluation Board

Evaluation/Development Tool Description

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.

Features
  • LLC:
    Secondary Side PFM Controller with Synchronous Rectifier Control
    Charge Current Control for better Transient Response and Simplified Feedback Loop Design
    Adaptive Synchronous Rectification Control with Dual Edge Tracking
    Closed Loop Soft-Start
    Green Functions to Improve Light Load Efficiency
    Symmetric PWM Control at Light Load to Limit the Switching Frequency while Reducing Switching Losses
    Disabling SR During Light Load Operation
    Complete Protection Functions with Auto-Restart
  • PFC:
    Continuous Conduction Mode and Average-Current-Mode Control
    Power-On Sequence Control
    Brownout Protection
    Fulfills Class-D Requirements of IEC 61000-3-2
    Universal AC Input Voltage
    Efficiency Optimization by External Output Voltage Adjustable Circuit
  • Technical Documents

    ON Semiconductor Full Web Site