Power Integrations

TOP249FN

TOP249FN Description

The TOP249FN is an integrated circuit (IC) offline switch designed for flyback topology applications, manufactured by Power Integrations. This device is part of the AC-DC Converters and Offline Switches category, offering a robust solution for power conversion needs. The TOP249FN features a breakdown voltage of 700V, capable of handling up to 250 watts of power, making it suitable for a wide range of high-power applications. It is housed in a TO262-7C package and is mounted through-hole, ensuring reliable mechanical stability and ease of integration into various electronic systems.

TOP249FN Features

• Topology: Flyback topology, ideal for applications requiring isolated output.
• Mounting Type: Through-hole, providing secure and durable mounting in PCBs.
• Voltage - Breakdown: 700V, ensuring robustness against high voltage spikes.
• Power (Watts): 250 W, capable of handling substantial power loads.
• Internal Switch(s): Yes, integrating a high-voltage MOSFET for efficient power switching.
• Control Features: Frequency control, optimizing switching performance and efficiency.
• Fault Protection: Comprehensive protection including current limiting, over-temperature, and over-voltage, enhancing reliability and safety.
• Frequency - Switching: 66kHz to 132kHz, offering flexibility in design and operation.
• Duty Cycle: 66.8%, providing efficient power delivery.
• Package: Tube packaging, suitable for bulk handling and storage.
• Output Isolation: Isolated, ensuring safety and reliability in high-voltage applications.
• RoHS Status: RoHS compliant, meeting environmental and regulatory standards.
• Moisture Sensitivity Level (MSL): 1 (Unlimited), indicating high resistance to moisture, suitable for various environmental conditions.

TOP249FN Applications

The TOP249FN is ideal for a variety of applications due to its high power handling capability, robust protection features, and efficient performance. It is particularly well-suited for:

• Power Supplies: High-efficiency power supplies for consumer electronics, industrial equipment, and telecommunications.
• Adapters and Chargers: Reliable power conversion for portable devices, ensuring safe and efficient charging.
• Lighting Systems: Driving LED lighting systems with high efficiency and reliability.
• Medical Equipment: Powering medical devices where safety and isolation are critical.
• Automotive Electronics: Robust power solutions for automotive applications, ensuring reliability in harsh environments.

Conclusion of TOP249FN

The TOP249FN from Power Integrations stands out as a versatile and reliable offline switch for flyback topology applications. Its high breakdown voltage, substantial power handling capability, and comprehensive fault protection make it an excellent choice for demanding applications. The device's frequency control and isolated output further enhance its performance and safety. While the product is marked as obsolete, it remains a valuable option for existing designs and legacy systems. For new projects, engineers may consider exploring Power Integrations' updated offerings, which build upon the TOP249FN's legacy of performance and reliability.