Power Integrations

TOP221GN

TOP221GN Description

The TOP221GN from Power Integrations is a high-performance offline switching IC designed for AC/DC power conversion in compact, energy-efficient applications. This surface-mount device integrates a 700V breakdown voltage MOSFET, enabling robust operation in boost, buck, flyback, and forward topologies. With a 9W power rating and 100kHz switching frequency, it delivers reliable performance for isolated power supplies. The IC features built-in current limiting and over-temperature protection, ensuring system safety under fault conditions. Compliant with RoHS and REACH standards, it is packaged in a tube for easy handling and assembly.

TOP221GN Features

• Integrated 700V MOSFET: Eliminates the need for external high-voltage switches, reducing BOM cost.
• Multi-Topology Support: Suitable for boost, buck, flyback, and forward converters, offering design flexibility.
• Advanced Protection: Includes current limiting and thermal shutdown for enhanced reliability.
• High Efficiency: 67% duty cycle and 100kHz switching optimize power delivery.
• Compact & Robust: Surface-mount 8SMD package saves board space while meeting MSL 4 (72 hours) moisture sensitivity requirements.

TOP221GN Applications

The TOP221GN is ideal for:

• Low-power AC/DC adapters for consumer electronics.
• Isolated auxiliary power supplies in industrial systems.
• LED drivers requiring high-voltage isolation.
• Household appliances with stringent safety and efficiency demands.
  Its isolated output and fault protection make it particularly suited for medical and telecom applications where reliability is critical.

Conclusion of TOP221GN

The TOP221GN stands out as a versatile, high-efficiency offline switcher with integrated protection and multi-topology support. Its 700V MOSFET and compact form factor make it a superior choice for designers seeking cost-effective, space-saving solutions in 9W power applications. Whether for consumer, industrial, or medical uses, this IC delivers performance, safety, and compliance in demanding environments.