FAN7631SJX_G

Power Supply Controllers, Monitors Overview

The FAN7631SJX_G is a Pulse Frequency Modulation (PFM) controller designed for high-efficiency half-bridge resonant converters. It integrates a high-side gate driver, a precision current-controlled oscillator, and comprehensive protection features. The device supports operating frequencies up to 600 kHz with programmable dead time. Key electrical parameters include a supply voltage range of 11.1 V to 21 V, a supply current of 10 mA, and an operating temperature range from -40°C to +130°C. It utilizes Zero Voltage Switching (ZVS) technology to minimize switching losses and electromagnetic interference.

Power Supply Controllers, Monitors Feature Summary

• Integrates a high-side gate driver with high peak output currents for efficient power stage control
• Supports Zero Voltage Switching (ZVS) to reduce switching losses and enhance overall converter efficiency
• Includes multiple protection mechanisms such as overvoltage, overcurrent, and thermal shutdown
• Features programmable dead time and frequency limiting modes for flexible design optimization

Power Supply Controllers, Monitors Applications

• Series resonant converter topologies
• Parallel resonant converter designs
• LLC resonant converter implementations

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix G against official onsemi documentation to confirm material or packaging variations. Confirm end-of-life status and availability through authorized distributors. Ensure compatibility with existing PCB footprints and verify RoHS compliance requirements for the target application environment before finalizing procurement decisions.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring high-frequency resonant conversion with integrated drive capabilities. Evaluate the need for ZVS operation to meet efficiency targets. Consider the wide operating temperature range for harsh environments. Verify that the input voltage range aligns with the system's power supply specifications and that the protection features match the safety requirements.

Power Supply Controllers, Monitors Part Context

This part belongs to the FAN7631 series of resonant controllers. It is distinct from standard gate drivers by integrating the control logic and oscillation circuitry. The SJX suffix typically denotes a tape and reel packaging format. It serves as a complete solution for building robust half-bridge resonant power supplies without external control ICs.

Power Supply Controllers, Monitors Replacement Considerations

Check for direct pin-to-pin replacements within the same family. Verify if alternative controllers offer similar ZVS capabilities and protection levels. Ensure any substitute matches the 16-SOP package dimensions and electrical characteristics. Consult official substitution guides for confirmed equivalents.