onsemi

FSL538APG

FSL538APG Description

The FSL538APG from onsemi is an obsolete but highly capable offline switch designed for flyback topology applications. This integrated circuit (IC) operates at a switching frequency of 100kHz and supports up to 25W of power output, making it suitable for low-to-mid-power AC/DC conversion. With an 800V breakdown voltage and a 16V startup voltage, it ensures robust performance in demanding environments. The device features either output isolation, providing flexibility in design. Packaged in a 7DIP through-hole format, it is engineered for reliability in industrial and consumer electronics.

FSL538APG Features

• Integrated Switch: Includes an internal switch, reducing external component count and simplifying design.
• Advanced Control: Features EN (enable) and soft-start functionality for smooth power-up sequences.
• Comprehensive Protection: Offers current limiting, over-load, over-power, over-temperature, and over-voltage fault protection, enhancing system durability.
• Regulatory Compliance: ROHS3 compliant and REACH unaffected, meeting environmental and safety standards.
• Wide Input Range: Supports universal input voltage applications due to its high breakdown voltage.
• Low Sensitivity: MSL (Moisture Sensitivity Level) Not Applicable, making it resilient in humid conditions.

FSL538APG Applications

The FSL538APG is ideal for:

• Power Adapters: Efficiently powers small devices like routers, set-top boxes, and LED drivers.
• Auxiliary Power Supplies: Used in industrial control systems, appliances, and telecom equipment.
• Consumer Electronics: Suitable for TVs, monitors, and other devices requiring compact, reliable power conversion.
• Lighting Systems: Powers LED drivers with its high efficiency and protection features.

Conclusion of FSL538APG

Though marked obsolete, the FSL538APG remains a robust solution for offline flyback converters, offering high integration, advanced protection, and regulatory compliance. Its 25W capability, 800V breakdown voltage, and flexible isolation options make it a versatile choice for legacy designs or replacements in power supplies. Engineers seeking a reliable, feature-rich offline switch for cost-sensitive or space-constrained applications may still find value in this proven IC.