TOP245YN Off-line Switcher IC

The TOP245YN Off-Line Switcher IC is a highly efficient AC-DC power conversion IC designed for switched-mode power supply (SMPS) applications. Part of the trusted TOPSwitch™ family, this device integrates a high-voltage power MOSFET, PWM controller, oscillator, and comprehensive protection circuitry into a single compact component.

The TOP245YN reduces overall component count, simplifies SMPS design, and improves system reliability. It supports a wide AC input voltage range and delivers stable, regulated output for medium-power applications. The YN version comes in a TO-220 package, allowing easy mounting with a heat sink for improved thermal performance.

With built-in protection features such as over-temperature shutdown, over-current limiting, short-circuit protection, and auto-restart during fault conditions, the TOP245YN ensures safe and durable operation in demanding power supply designs.

Key Features :

• Integrated high-voltage power MOSFET

• Advanced PWM control for precise regulation

• Wide AC input voltage range

• Over-temperature protection

• Over-current and short-circuit protection

• Auto-restart fault protection

• Reduced external component requirement

• TO-220 (YN) package for better heat dissipation

• High efficiency and compact design