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TOP244YN Off-Line PWM Switch IC

TOP244YN Off-Line PWM Switch IC

is an integrated off-line PWM switch IC from the TOPSwitch-GX series by Power Integrations. Designed to simplify and reduce the cost of power supply designs, it combines a high-voltage power MOSFET, PWM controller, fault protection circuitry, and startup logic into a single monolithic device.

Operating directly from rectified AC mains, the TOP244YN supports output power levels of up to 75W in universal input ranges, making it ideal for adapters, industrial control supplies, and open-frame power systems. It features features such as frequency jittering for EMI reduction, hysteretic thermal shutdown, and auto-restart for fault recovery.

Encapsulated in a TO-220-7C through-hole package, it is suited for designs where thermal dissipation, robustness, and space optimization are key.

How EstiSource Helps

EstiSource supports design and sourcing teams by streamlining the acquisition of critical components like the TOP244YN. From real-time cost insights and alternate part recommendations to trusted supplier links and availability alerts, our platform ensures engineers and buyers reduce procurement time and cost, especially when dealing with integrated power ICs.

Why Choose EstiSource for Sourcing

Real-time BOM pricing with multiple authorized global vendors of Power Integrations ICs. Compare lead times, bulk MOQ pricing, and import costs from India, Singapore, and the U.S. Request alternate part suggestions with equivalent specs for faster delivery. Use EstiSource to generate export-ready RFQs with compliance documentation. Purchase small quantities without distributor registration. Validate parts with images, pinouts, and datasheet access before purchase. Get combo packs that include supporting components (diodes, transformers, etc.) to complete power supply designs. Secure payment and direct courier delivery via trusted logistics. Use cost estimation models to benchmark your AC-DC converter BOM across 20+ countries. Leverage EstiSource's AI tool to identify cost drivers and suggest layout improvements. Integrate parts sourcing into your product development timeline with MOQ-based alerts. Access design support documents for compliance with CE, BIS, and UL certifications. At EstiSource, we understand that choosing the right power supply controller is not just about specs—it’s about cost, supply chain agility, and confidence in quality. Whether you need the TOP244YN for industrial-grade power modules or are building your first commercial product, we help you streamline component selection, pricing, and sourcing.

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6. Frequently Asked Questions


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