Power Integrations

TOP226YN

TOP226YN Description

The TOP226YN from Power Integrations is a high-performance offline switching IC designed for AC/DC power conversion applications. This Through Hole-mounted device integrates a 700V breakdown voltage MOSFET, enabling efficient power handling up to 125W. It supports multiple topologies including Boost, Buck, Flyback, and Forward, making it versatile for diverse power supply designs. With a 100kHz switching frequency and 67% duty cycle, it balances efficiency and thermal performance. The IC is RoHS compliant and features isolated output, ensuring safety and regulatory adherence. Although marked as Not For New Designs, it remains a reliable choice for legacy systems.

TOP226YN Features

• Integrated 700V MOSFET: Reduces external component count and simplifies design.
• Multi-Topology Support: Compatible with Boost, Buck, Flyback, and Forward configurations.
• High Power Handling: Delivers up to 125W, suitable for medium-power applications.
• Fault Protection: Includes current limiting and over-temperature protection for robust operation.
• Isolated Output: Enhances safety in offline power supplies.
• 100kHz Switching Frequency: Optimizes efficiency and reduces transformer size.
• RoHS Compliant & REACH Unaffected: Meets environmental and regulatory standards.

TOP226YN Applications

The TOP226YN excels in offline power supplies for industrial, consumer, and telecom equipment. Key use cases include:

• AC/DC Adapters: For laptops, monitors, and peripherals.
• Auxiliary Power Supplies: In servers, networking gear, and UPS systems.
• LED Drivers: Providing stable power for lighting systems.
• Industrial Controls: Powering PLCs, sensors, and motor drives.
  Its multi-topology flexibility and integrated protections make it ideal for designs requiring reliability and compactness.

Conclusion of TOP226YN

The TOP226YN is a versatile, high-voltage offline switcher offering efficiency, integration, and robustness. While phased out for new designs, its 125W capability, fault protections, and topology flexibility ensure continued relevance in legacy and maintenance applications. Engineers value its simplified design and compliance with environmental standards, making it a pragmatic choice for cost-sensitive, medium-power solutions.