The FSFR1700 is a highly integrated power switch designed by ON Semiconductor, tailored for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components. This advanced power switch combines a power MOSFET and a high-voltage gate driver, providing a compact solution that enhances the efficiency and reliability of power systems.

Key Features

• High Efficiency: With its integrated high-voltage power MOSFET, the FSFR1700 enables efficient power conversion, which is crucial for reducing heat dissipation and improving system reliability.
• Advanced Pulse Frequency Modulation (PFM): This technique allows the FSFR1700 to adjust the switching frequency under light-load conditions, leading to reduced standby power consumption and meeting energy-saving standards.
• Comprehensive Protection Features: The device includes various protection mechanisms such as overcurrent protection (OCP), overvoltage protection (OVP), and thermal shutdown (TSD), ensuring the safety and longevity of the power supply and the end application.
• Built-in Soft-Start Function: The FSFR1700 incorporates a soft-start function that minimizes inrush current during start-up, contributing to the stability of the power supply.

Applications

The FSFR1700 is versatile and can be used in a wide array of applications, including:

• Flat Panel Display (FPD) TVs
• Desktop PCs and Servers
• Home Audio Systems
• Industrial Power Systems

Technical Specifications

The FSFR1700 operates in a wide input voltage range and is designed to drive the primary side of a flyback transformer in SMPS circuits. It supports a high breakdown voltage, which is critical for handling high input voltage scenarios without compromising performance.

Conclusion

The ON Semiconductor FSFR1700 is a robust and efficient solution for designers looking to optimize their power supply designs with a focus on performance, energy efficiency, and reliability. Its integration of key functions and protective features in a single chip makes it a compelling choice for a wide range of power applications.