TOP259LN

AC DC Converters, Offline Switchers Overview

The TOP259LN is an integrated off-line switcher from the TopSwitch-HX family, manufactured by Power Integrations. It incorporates a 700 V power MOSFET, high voltage switched current source, PWM control, oscillator, thermal shutdown, and cycle-by-cycle current limit into a single eSIP-7F package. The device operates with a switching frequency of 66 kHz or 132 kHz and supports flyback topology applications up to 162 W at 230 V AC input.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with high voltage switched current source for simplified design
• Includes advanced protection features such as thermal shutdown and cycle-by-cycle current limiting
• Offers selectable switching frequencies to optimize transformer size and EMI performance

AC DC Converters, Offline Switchers Applications

• Telecommunications equipment power supplies
• General purpose offline power adapters
• Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'LN' against the manufacturer's official datasheet to confirm the exact switching frequency option (66 kHz vs 132 kHz) and pinout configuration. Ensure the eSIP-7F package type matches the target PCB footprint requirements before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-effective flyback designs requiring high integration. The TopSwitch-HX series is suitable for applications needing robust protection without external controller complexity. Consider the thermal performance of the eSIP-7F package relative to the expected power dissipation in the final enclosure.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TopSwitch-HX family, which provides enhanced EcoSmart technology. It is designed to replace discrete controller and MOSFET solutions, reducing component count and board space. The family is widely used in medium-power offline converter designs.

AC DC Converters, Offline Switchers Replacement Considerations

Compatible variants within the same family include TOP258LN and TOP260LN, which offer different power ranges but share similar pinouts and feature sets. Verify electrical parameters match the specific application requirements when substituting.