TOP242PN

AC DC Converters, Offline Switchers Overview

The TOP242PN is a high-voltage integrated switch from the TOPSwitch-II family, designed for offline flyback converters. It integrates a 700V power MOSFET with a current-mode controller and protection features. The device operates in a fixed frequency mode with cycle-by-cycle current limiting. It includes an internal oscillator that sets the switching frequency at approximately 132 kHz. The package is an 8-pin DIP or flatpack configuration, suitable for through-hole mounting. Key electrical characteristics include a drain-source breakdown voltage of 700V and a gate drive capability sufficient for direct MOSFET control without external drivers.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power MOSFET with a current-mode controller
• Includes built-in cycle-by-cycle current limiting and thermal shutdown
• Features an internal oscillator for fixed-frequency operation
• Eliminates the need for external driver components

AC DC Converters, Offline Switchers Applications

• Offline flyback power supplies
• AC-DC adapters for consumer electronics
• Battery chargers
• Standby power supplies for TVs and monitors

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., PN for DIP) matches the required package type. Confirm the manufacturing date code and lot traceability if required by your quality management system. Ensure the component is sourced from authorized distributors to guarantee authenticity and prevent counterfeits. Check for any RoHS compliance markings on the packaging documentation.

AC DC Converters, Offline Switchers Selection Notes

Select this part when designing flyback converters requiring high integration and robust protection. Consider the input voltage range and output power requirements to ensure the TOP242PN's energy handling capability is sufficient. Evaluate the thermal performance based on the expected ambient temperature and heat dissipation path. Compare against other TOPSwitch-II variants if different pinouts or slightly different electrical limits are needed.

AC DC Converters, Offline Switchers Part Context

The TOP242PN belongs to the TOPSwitch-II family, which was widely used in mid-power offline applications before being succeeded by newer generations like TOPSwitch-GX. It represents a mature technology offering reliable performance for cost-sensitive designs. The family is known for its simplicity and reduced component count compared to discrete solutions.