POWER INTEGRATIONS TOP244YN Off Line Switcher, TO220-6 Package, 244 Series

The POWER INTEGRATIONS TOP244YN is an advanced TOPSwitch-GX EcoSmart integrated off line switcher, designed for energy-efficient and cost-effective power supply solutions. Housed in a robust 6-pin TO-220 package, this IC integrates a high-voltage power MOSFET, PWM control, comprehensive fault protection, and other essential control circuitry onto a single CMOS chip. This highly integrated design reduces overall system cost while improving design flexibility, performance, and energy efficiency.

Engineered for reliability, the TOP244YN incorporates key features such as soft start for reduced inrush current and frequency jittering to minimise electromagnetic interference (EMI). It offers a wider maximum duty cycle (DCMAX) for greater power delivery and uses larger creepage packages for enhanced safety. A hysteretic thermal shutdown feature provides automatic fault recovery, and its large thermal hysteresis helps prevent printed circuit board (PCB) overheating, ensuring long-term operational stability.

Key Features & Performance

• High Output Power: Delivers up to 65W at 230VAC (45W from 85-265VAC) in open-frame designs, and 30W at 230VAC (20W from 85-265VAC) in non-ventilated enclosed adapters.
• Design Optimisation: The extended power range and wider duty cycle allow for more power from a smaller input capacitor, streamlining power supply design.
• Efficient Operation: Regulates effectively down to zero load without requiring dummy loads, improving efficiency under light-load conditions.
• Compact Design: A 132kHz switching frequency enables the use of smaller, more cost-effective transformers and power supply components.
• Precision & Reliability: All critical parameters, including current limit, frequency, and PWM gain, feature tighter temperature and absolute tolerances for simplified, optimised system design.

This versatile switcher is an ideal choice for a **