LYT4321E

LYT4321E - LYTSwitch-4 AC-DC Offline Switching IC

The LYT4321E from Power Integrations is a high-performance AC-DC offline switching IC from the LYTSwitch-4 family, designed for isolated flyback, buck, and boost topologies. This integrated controller delivers up to 12W of power with exceptional efficiency and reliability, making it ideal for LED drivers, auxiliary power supplies, and compact AC-DC converters in industrial, telecommunications, and consumer applications.

Key Features & Benefits

• 725V Breakdown Voltage - High-voltage capability for universal input designs
• 12W Power Output - Optimized for low to medium power applications
• 140kHz Switching Frequency - Enables compact transformer designs
• 99.9% Duty Cycle - Maximizes efficiency and output regulation
• Wide Operating Temperature Range - -40°C to 150°C (TJ) for harsh environments
• Integrated Switch - Reduces component count and simplifies design
• Multiple Topology Support - Flyback, step-down (buck), and step-up (boost) configurations

Applications

The LYT4321E is well-suited for LED lighting drivers, smart home devices, industrial controls, white goods appliances, and any application requiring a compact, efficient, and reliable AC-DC power solution with full isolation.

Authorized Distributor - Full Traceability

We supply 100% authentic LYT4321E ICs with complete manufacturer documentation, traceability, and long lifecycle support. All units are sourced through authorized channels with full warranty coverage.

• LYT4321E.pdf