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FAN7688 - Advanced Secondary Side LLC Resonant Converter Controller

General Description

controller for LLC resonant converters with Synchronous Rectification (SR) that offers best in class efficiency for isolated DC/DC converters.

Key Features

  • Secondary Side PFM Controller for LLC Resonant Converter with Synchronous Rectifier Control.
  • Charge Current Control for Better Transient Response and Easy Feedback Loop Design.
  • Adaptive Synchronous Rectification Control with Dual Edge Tracking.
  • Closed Loop Soft.
  • Start for Monotonic Rising Output.
  • Wide Operating Frequency (39 kHz~690 kHz).
  • Green Functions to Improve Light.
  • Load Efficiency.
  • Symmetric PWM Control at Light.

📥 Download Datasheet

Datasheet Details

Part number FAN7688
Manufacturer onsemi
File Size 0.97 MB
Description Advanced Secondary Side LLC Resonant Converter Controller
Datasheet download datasheet FAN7688 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DATA SHEET www.onsemi.com Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control FAN7688 SOP16 CASE 565BF MARKING DIAGRAM Description The FAN7688 is an advanced Pulse Frequency Modulated (PFM) controller for LLC resonant converters with Synchronous Rectification (SR) that offers best in class efficiency for isolated DC/DC converters. It employs a current mode control technique based on a charge control, where the triangular waveform from the oscillator is combined with the integrated switch current information to determine the switching frequency. This provides a better control−to−output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability.