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TOP257YN Off-line Switcher IC
₹95.00 inc. GST
TOP257YN is a high-efficiency off-line switcher IC with integrated MOSFET and protection features, ideal for SMPS and AC-DC power supply designs.
The TOP257YN Off-Line Switcher IC is a highly integrated AC-DC power conversion IC designed for compact and energy-efficient switched-mode power supplies (SMPS). Belonging to the TOPSwitch™-HX family, this device integrates a high-voltage power MOSFET, PWM controller, oscillator, and multiple protection features into a single component.
The TOP257YN significantly reduces external component count, simplifying power supply design while improving efficiency and reliability. It supports a wide AC input voltage range and delivers stable, regulated output, making it ideal for industrial equipment, adapters, chargers, LED drivers, and home appliances.
Built-in safety protections such as thermal shutdown, over-current limiting, auto-restart, and line over-voltage protection ensure secure and long-term operation. The “YN” version comes in a TO-220 package, suitable for higher power applications with efficient heat dissipation.
Key Features :
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Integrated high-voltage power MOSFET
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PWM control with precise regulation
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Wide input voltage range
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Over-temperature protection
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Over-current and short-circuit protection
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Auto-restart feature
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Line over-voltage protection
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TO-220 (YN) package for better thermal performance

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- Output capacity: DC 5V - 36V, at room temperature, continuous current 15A, power 400W! Lower auxiliary cooling conditions, the maximum current up to 30A.
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- Operating temperature: -40-85
- Dimension: 34mm x 17mm x 12mm
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