LNK6665K

LNK6665K - LinkSwitch™-HP Integrated Offline Switcher IC

The LNK6665K from Power Integrations is a high-performance 42W integrated offline switcher IC designed for isolated flyback AC-DC power conversion applications. Part of the LinkSwitch-HP family, this device integrates a 650V power MOSFET with advanced control circuitry, delivering reliable and efficient power conversion for industrial, consumer, and telecommunications equipment.

Key Features & Benefits

• 42W Output Power: Ideal for mid-power AC-DC applications requiring compact, cost-effective solutions
• 650V High-Voltage MOSFET: Integrated power switch handles universal AC input with margin
• 120-136kHz Switching Frequency: Enables smaller magnetics and compact PCB layouts
• Comprehensive Protection: Built-in current limiting, overload, over-temperature, over-voltage, and short-circuit protection ensures robust operation
• 64% Maximum Duty Cycle: Optimized for flyback topology efficiency
• Surface Mount 12-ESOP Package: Space-saving design with exposed pad for enhanced thermal performance
• -40°C to 150°C Junction Temperature Range: Suitable for demanding industrial and automotive environments

Applications

• AC-DC power supplies for industrial automation and control systems
• Telecom and networking equipment power modules
• Consumer electronics adapters and chargers
• Smart home and IoT device power supplies
• LED lighting drivers and auxiliary power supplies

Why Choose LNK6665K?

The LNK6665K simplifies power supply design by integrating the high-voltage switch, control logic, and protection features into a single IC. This reduces component count, lowers BOM cost, and accelerates time-to-market. Power Integrations' proven LinkSwitch-HP architecture delivers excellent efficiency, low standby power, and high reliability—backed by full manufacturer documentation and traceability from authorized distributors.

Authenticity & Support Guarantee

All LNK6665K units are sourced from authorized Power Integrations distributors with full manufacturer traceability, documentation, and warranty support. We provide long lifecycle availability to support your design programs and mitigate obsolescence risk. Technical resources, reference designs, and design-in support available upon request.

• LNK6665K.pdf