TOP261EG

AC DC Converters, Offline Switchers Overview

The TOP261EG is an AC-DC converter IC from the TOPSwitch-HX family, designed for offline flyback applications. It integrates a high-voltage switching transistor with a current-mode controller and power MOSFET. The device supports dual switching frequencies of 66 kHz and 132 kHz to optimize transformer size and acoustic noise performance. It features a maximum duty cycle of 78% and operates within an input voltage range of 85 VAC to 265 VAC. The component provides up to 333 W of output power and includes comprehensive protection mechanisms such as overvoltage, overtemperature, and current limiting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with a current-mode controller for compact offline power supply designs
• Supports selectable switching frequencies of 66 kHz and 132 kHz to balance efficiency and acoustic noise
• Includes robust fault protection features covering overvoltage, overtemperature, and cycle-by-cycle current limiting

AC DC Converters, Offline Switchers Applications

• High-power consumer electronics power supplies
• Industrial equipment power systems
• Telecommunications infrastructure power modules

AC DC Converters, Offline Switchers Procurement Notes

Verify that the ordering suffix 'EG' corresponds to the specific eSIP-7C package variant required for your design. Confirm compliance with RoHS3 standards and ensure the manufacturer's datasheet is consulted for thermal management guidelines related to the SIP-7 footprint.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring high power density and integrated protection in a single package. Ensure the design accommodates the specified 700V breakdown voltage and verify that the thermal dissipation requirements align with the 118W power dissipation capability under expected operating conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-HX series, which represents a generation of highly integrated power solutions. The series is characterized by its ability to deliver significant power levels while minimizing external component count. The TOP261EG specifically targets higher power ranges compared to lower-numbered variants in the same family.

AC DC Converters, Offline Switchers Replacement Considerations

The TOP261EN is a documented substitute part number for the TOP261EG.