TOP266VG

AC DC Converters, Offline Switchers Overview

The TOP266VG is a high-voltage integrated circuit from the TOP264-270 family, designed for offline flyback converters. It integrates a 700V power MOSFET with a current-mode controller and high-voltage startup circuit. The device operates in a fixed frequency mode with cycle-by-cycle peak current limiting. It features an internal oscillator that sets the switching frequency, which can be adjusted via an external resistor. The IC includes comprehensive protection mechanisms such as overvoltage lockout, thermal shutdown, and open-loop protection to ensure reliable operation under various fault conditions.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power MOSFET with a current-mode controller
• Includes high-voltage startup circuit for efficient operation
• Features cycle-by-cycle peak current limiting for robust protection
• Offers thermal shutdown and open-loop protection capabilities

AC DC Converters, Offline Switchers Applications

• Offline flyback converters for AC-DC power supplies
• Universal input adapters for consumer electronics
• Battery chargers for portable devices
• Standby power supplies for televisions and monitors

AC DC Converters, Offline Switchers Procurement Notes

Verify the exact part marking and date code against official Power Integrations documentation. Ensure the package type matches the required PCB footprint. Confirm that the voltage rating and current limits align with the specific application design requirements before procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component based on the required output power and input voltage range of the target application. Consider the thermal performance and packaging options available. Evaluate the need for additional external components for frequency adjustment or protection enhancements.

AC DC Converters, Offline Switchers Part Context

The TOP266VG belongs to the TOP264-270 series, which are widely used in cost-sensitive, high-volume applications. This family is known for its simplicity and reliability, making it suitable for general-purpose power supply designs. The integration of the MOSFET and controller reduces the component count and simplifies the design process.

AC DC Converters, Offline Switchers Replacement Considerations

Direct replacements within the same family include TOP264VG, TOP265VG, TOP267VG, TOP268VG, TOP269VG, and TOP270VG. These parts share similar pinouts and functionalities but differ in maximum drain current ratings. Verify compatibility with existing design parameters when substituting.