TOP257PN

AC DC Converters, Offline Switchers Overview

The TOP257PN is an AC-DC converter from the TOPSwitch-HX family, integrating a 700 V power MOSFET, high-voltage switching current source, PWM controller, oscillator, thermal shutdown circuit, and fault protection. It operates with a maximum output power of 41 W and a switching frequency of 66 kHz. The device features a maximum duty cycle of 78% and supports through-hole installation in a DIP-8 package. It functions within a temperature range of -40 °C to +150 °C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with high-voltage switching current source and PWM controller on a single monolithic chip
• Includes built-in thermal shutdown circuitry and comprehensive fault protection mechanisms
• Utilizes frequency jittering to reduce electromagnetic interference (EMI)
• Achieves low standby and no-load power consumption via EcoSmart technology

AC DC Converters, Offline Switchers Applications

• Off-line switcher ICs for general-purpose power supplies
• AC-DC converters for consumer electronics
• Industrial control system power modules
• Battery chargers and adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'PN' corresponds to the DIP-8 through-hole package configuration. Confirm RoHS compliance status and lead times directly with Power Integrations or authorized distributors. Ensure design compatibility with the specified 700 V breakdown voltage and 41 W power rating requirements.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching capabilities without external discrete MOSFETs. Consider the DIP-8 package for through-hole assembly processes. Evaluate the 66 kHz switching frequency against EMI constraints and thermal management needs for the target application environment.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-HX series by Power Integrations, designed for high-reliability offline power conversion. The series combines power switching and control logic to minimize component count and board space. The TOP257PN variant specifically targets applications needing robust protection features and efficient power density in a standard through-hole footprint.

AC DC Converters, Offline Switchers Replacement Considerations

TOP257GN-TL offers similar electrical specifications but utilizes an SMD/SMT package instead of through-hole.