TOP255PG

AC DC Converters, Offline Switchers Overview

The TOP255PG is an integrated off-line switcher from the TOPSwitch-HX family by Power Integrations. It combines a 700 V power MOSFET, high-voltage switched current source, PWM controller, oscillator, and thermal shutdown circuitry on a single chip. The device utilizes eSIP-7G packaging for through-hole mounting. It supports a switching frequency of 66 kHz with a maximum duty cycle of 78%. The rated output power is 48 W, while the dissipation power is specified at 26.0 W. Operating temperatures range from -40 °C to 150 °C junction temperature.

AC DC Converters, Offline Switchers Feature Summary

• Multi-mode operation maximizes efficiency across all load conditions
• Integrated output overvoltage protection with user-programmable latching or non-latching shutdown
• Line undervoltage detection prevents turn-off glitches during AC line disturbances
• Low thermal impedance junction-to-case design eliminates need for heat sinks up to 35 W

AC DC Converters, Offline Switchers Applications

• Universal input AC-DC adapters
• Monitor and display power supplies
• General purpose offline power conversion

AC DC Converters, Offline Switchers Procurement Notes

Verify the package suffix 'PG' corresponds to the eSIP-7G through-hole variant in official datasheets. Confirm RoHS compliance status and lead-free specifications match project requirements. Cross-reference pinout diagrams to ensure compatibility with existing PCB footprints. Validate that the 66 kHz switching frequency aligns with transformer design constraints.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring robust fault protection and high reliability in space-constrained applications. The eSIP-7G package facilitates automated assembly and simple clip-style heatsinking. Consider the 48 W power rating against thermal management capabilities without external heatsinks. Ensure input voltage ranges meet system specifications for universal AC inputs.

AC DC Converters, Offline Switchers Part Context

Part of the TOPSwitch-HX family featuring enhanced EcoSmart technology. This series integrates advanced features like frequency jittering for EMI reduction and precise current limiting. The TOP255PG specifically targets mid-power applications where cost-effective, high-performance offline switching is required without complex discrete component counts.

AC DC Converters, Offline Switchers Replacement Considerations

TOP255PN offers identical electrical characteristics in a surface-mount eSIP-7N package. TOP255EN provides the same functionality in an eSIP-7E package. Verify mechanical footprint differences when substituting between P, N, and E suffixes.