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FAN7631 - Advanced Pulse Frequency Modulation Controller

General Description

The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions.

Key Features

  • Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topologies.
  • High Efficiency with Zero-Voltage-Switching (ZVS).
  • Up to 600kHz Operating Frequency.
  • Built-in High-Side Gate Driver.
  • High Gate-Driving Current: +500mA/-1000mA.
  • Programmable Dead Time with a Resistor.
  • Pulse Skipping and Burst Operation for Frequency Limit (Programmable) at Light-Load Condition.
  • Simple Remote On/Off Control with Latch or Auto-Restart (A/R) Using FI.

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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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FAN7631 — Advanced PFM Controller for Half-Bridge Resonant Converters April 2012 FAN7631 Advanced Pulse Frequency Modulation (PFM) Controller for Half-Bridge Resonant Converters Features  Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topologies  High Efficiency with Zero-Voltage-Switching (ZVS)  Up to 600kHz Operating Frequency  Built-in High-Side Gate Driver  High Gate-Driving Current: +500mA/-1000mA  Programmable Dead Time with a Resistor  Pulse Skipping and Burst Operation for Frequency Limit (Programmable) at Light-Load Condition  Simple Remote On/Off Control with Latch or Auto-Restart (A/R) Using FI or LS Pin  Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Curr