TOP234YN PI TO220

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TOP234YN – Power Integrations Offline Switcher IC

TOP234YN – Power Integrations Offline Switcher IC

is a high-performance off-line switcher IC from Power Integrations' TOPSwitch-II series, designed for efficient, compact, and low-cost switch-mode power supply (SMPS) applications. Housed in a TO-220 package, this IC integrates a high-voltage power MOSFET, PWM controller, thermal shutdown, and fault protection circuitry into a single monolithic device. It eliminates the need for complex discrete designs by offering a highly integrated solution for flyback converters used in AC-DC adapters, LED drivers, industrial power supplies, and auxiliary power supplies. The device supports universal input voltage and delivers outputs up to 50W without a heatsink, making it an attractive solution for compact and reliable power systems.

How EstiSource Helps

EstiSource supports design and sourcing teams by streamlining the acquisition of critical components like the TOP234YN Switcher IC.
For B2B Buyers:
  • Access real-time pricing from certified PI distributors globally.
  • Get pin-compatible replacements in case of EOL risk or budget constraints.
  • Filter by compliance needs like UL/CE certified versions.
  • Seamless integration into multi-line BOMs via our RFQ automation tool.
For B2C / Individual Buyers:
  • Buy low quantities for prototyping or hobby use with warranty-backed parts.
  • Get technical datasheets, thermal guidelines, and free layout support.
  • Order from trusted sources—no fakes or mismarked ICs.
For Startups & Design Engineers:
  • Match with custom SMPS design partners via our supplier network.
  • Get comparative quotes for different control IC topologies.
  • Access tutorials and validated circuits using TOP234YN or its newer variants.
  • Use our design validation checklist to avoid burnouts or EMI issues.

Why Choose EstiSource for Sourcing

At EstiSource, we go beyond just pricing and supply — we help you design smarter. Whether you're integrating a high-voltage controller like the TOP234YN into a consumer product or prototyping for industrial-grade SMPS, we help you analyze, source, and verify every component decision. With EstiSource, you get technical clarity, global supplier access, and scalable cost insights, all in one place.

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