TOP242YN

AC DC Converters, Offline Switchers Overview

The TOP242YN is a high-voltage integrated off-line switcher from the TOPSwitch-GX family by Power Integrations. It integrates a 700 V power MOSFET, PWM controller, and protection circuitry into a single CMOS chip. The device operates with an AC input voltage range of 85 to 265 V and supports output power up to 34 W without requiring a heat sink in P/G packages. Key electrical parameters include a switching frequency of 132 kHz and a maximum supply current of 2.2 mA.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET, PWM control, and fault protection onto a single CMOS chip for reduced system cost.
• Features externally programmable accurate current limit and separate line sense pins on Y/R/F packages.
• Includes fully integrated soft-start to minimize stress and overshoot during startup.
• Provides hysteretic thermal shutdown for automatic fault recovery and prevents PCB overheating.

AC DC Converters, Offline Switchers Applications

• High-efficiency universal input AC-DC converters
• Low-cost power adapters
• Sealed-off power supply modules

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific package suffix (e.g., YN) against the manufacturer's official datasheet to confirm pinout and lead configuration. Confirm RoHS compliance status as legacy variants may differ. Ensure design compatibility with the TOPSwitch-GX topology requirements before procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring extended power flexibility and high efficiency. The TOPSwitch-GX architecture allows for smaller input capacitors and transformers due to wider duty cycle capabilities. Consider the external programming options for precise current limiting and line sensing integration.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-GX family, which offers enhanced design flexibility compared to standard TOPSwitch devices. The family includes multiple pin configurations (Y, R, F, G, P) to support various power levels and feature sets, ranging from basic regulation to advanced line sensing and programmable limits.

AC DC Converters, Offline Switchers Replacement Considerations

Direct replacements within the same family include TOP243YN, TOP244YN, TOP245YN, TOP246YN, TOP247YN, TOP248YN, and TOP249YN. Verify that the substitute part matches the required power level and package type. Note that older TOPSwitch parts are not recommended for new designs.