POWER INTEGRATIONS TNY264PN Off-Line Switcher, DIP8 Package

The POWER INTEGRATIONS TNY264PN is a TinySwitch-II series, EcoSmart, enhanced energy-efficient low-power off-line switcher presented in an 8-pin DIP package. This advanced device integrates a 700V power MOSFET, an oscillator, a high-voltage switched current source, and current limit and thermal shutdown circuitry onto a single monolithic chip. By deriving its start-up and operating power directly from the voltage on the DRAIN pin, it eliminates the need for a bias winding and its associated circuitry, simplifying design and reducing component count.

The TinySwitch-II incorporates several intelligent features for robust performance, including auto-restart, line undervoltage sensing, and frequency jittering. An innovative design minimises audio frequency components within its simple ON/OFF control scheme, practically eliminating audible noise even with standard taped or varnished transformer construction. Its fully integrated auto-restart circuit safely limits output power during fault conditions such as an output short circuit or open loop, enhancing system safety and reliability while cutting costs on secondary feedback circuitry.

Key Features & Performance

• High Efficiency: Meets stringent CEC, Energy Star, and EU regulatory requirements for energy efficiency.
• Output Power: Delivers up to 9W at 230VAC (6W from 85-265VAC) in an open-frame design, or 5.5W at 230VAC (4W from 85-265VAC) in a non-ventilated enclosed adapter.
• Quiet Operation: Built-in circuitry ensures virtually no audible noise with ordinary dip-varnished transformers.
• Compact Design: Operates at 132kHz, allowing for a reduced transformer size and the use of cost-effective, small EF12.6 or EE13 cores.
• Robust Protection: Features built-in current limiting and thermal shutdown for improved application safety.
• Design Simplicity: Offers very tight tolerances and negligible temperature variation,e