TOP232YN

TOP232YN - TOPSwitch-FX Offline Switching IC for High-Performance AC/DC Power Supplies

The TOP232YN from Power Integrations is a highly integrated offline switching IC engineered for flyback topology AC/DC power supplies up to 25W. This advanced solution combines a robust 700V power MOSFET with intelligent control circuitry, delivering exceptional reliability, efficiency, and design simplicity for your power conversion applications.

Key Features & Benefits

• 25W Power Output Capability - Optimized for compact, cost-effective power supply designs in consumer and industrial applications
• 700V High-Voltage MOSFET - Integrated breakdown voltage rating supports universal input (85-265VAC) applications with margin
• Comprehensive Integrated Protection - Built-in current limiting, over-temperature shutdown, and over-voltage protection ensure safe, reliable operation and extended service life
• Wide Switching Frequency Range - 66kHz to 132kHz with frequency control capability for EMI optimization and design flexibility
• High Efficiency Design - 78% maximum duty cycle enables optimized transformer utilization and improved power conversion efficiency
• Extended Temperature Range - Operates reliably from -40°C to 150°C (TJ) for demanding industrial and automotive environments
• Simplified Design - Single-package integration reduces component count, board space, and design complexity
• Through-Hole TO-220-7B Package - Industry-standard package with formed leads for easy assembly and excellent thermal performance

Target Applications

The TOP232YN is the ideal choice for a wide range of isolated AC/DC power conversion applications, including:

• Consumer electronics adapters and chargers
• Industrial control systems and instrumentation
• LED lighting drivers and ballasts
• Auxiliary and housekeeping power supplies
• Standby and always-on power systems
• Home appliances and white goods
• Telecommunications equipment

Why Choose the TOP232YN for Your Design?

The TOP232YN represents Power Integrations' commitment to simplifying power supply design without compromising performance or reliability. By integrating the high-voltage power MOSFET and sophisticated control circuitry into a single, cost-effective package, the TOP232YN dramatically reduces your component count, board space requirements, and overall design complexity.

The comprehensive suite of protection features—including automatic current limiting, thermal shutdown, and over-voltage protection—ensures robust operation across varying load conditions and fault scenarios, enhancing system reliability and extending product lifetime. The wide switching frequency range provides design flexibility for EMI compliance and allows optimization for specific application requirements.

With its proven TOPSwitch-FX architecture, extended temperature range, and RoHS compliance, the TOP232YN is the smart choice for engineers seeking a reliable, efficient, and cost-effective solution for isolated AC/DC power conversion up to 25W.

Design Resources & Support

Power Integrations provides comprehensive design support including reference designs, application notes, and PI Expert™ design software to accelerate your development cycle and ensure optimal performance. Our global technical support team is ready to assist with your specific application requirements.

• TOP232YN.pdf