Power Integrations

TOP227Y

TOP227Y Description

The TOP227Y from Power Integrations is a high-performance offline switching IC designed for AC/DC power conversion applications. This obsolete through-hole-mounted device integrates a 700V breakdown voltage MOSFET, making it suitable for high-voltage power supplies. With a switching frequency of 100kHz and a power handling capability of 150W, it supports topologies like Boost, Buck, Flyback, and Forward converters. The IC features isolated output and robust fault protection, including current limiting and over-temperature shutdown, ensuring reliable operation in demanding environments. Packaged in a TO-220-3 tube, it complies with REACH Unaffected and EAR99 regulations, making it a versatile choice for industrial and commercial designs.

TOP227Y Features

• Integrated 700V MOSFET: Reduces external component count and simplifies design.
• Multi-Topology Support: Compatible with Boost, Buck, Flyback, and Forward configurations.
• High Efficiency: 100kHz switching frequency optimizes power conversion.
• Comprehensive Protection: Built-in current limiting and thermal shutdown enhance system reliability.
• Isolated Output: Ensures safety in high-voltage applications.
• Wide Duty Cycle (67%): Improves flexibility in power supply designs.
• Industrial Compliance: Meets REACH and EAR99 standards for global use.

TOP227Y Applications

The TOP227Y excels in offline power supplies, including:

• Industrial Power Systems: For motor drives, PLCs, and automation equipment.
• Consumer Electronics: Adapters, LED drivers, and auxiliary power units.
• Telecom Infrastructure: Base stations and network power modules.
• Medical Devices: Isolated power supplies for patient safety.
  Its high voltage tolerance and integrated protections make it ideal for rugged environments where reliability is critical.

Conclusion of TOP227Y

The TOP227Y is a robust, high-voltage offline switcher offering simplified design, multi-topology support, and advanced protection features. While now obsolete, its 150W power handling, 700V rating, and isolated output make it a legacy solution for industrial, telecom, and medical applications. Engineers seeking reliable, high-efficiency power conversion in constrained designs may still find value in existing inventories or similar modern alternatives from Power Integrations.