TOP252EG

AC DC Converters, Offline Switchers Overview

The TOP252EG is an integrated off-line switcher from the TOPSwitch-HX family, designed for flyback converter topologies. It incorporates a 700V power MOSFET, high-voltage current source, multi-mode PWM controller, oscillator, and thermal shutdown circuitry within a single chip. The device supports switching frequencies of 66 kHz and 132 kHz to optimize transformer size and efficiency. It delivers up to 21 W of output power with a maximum duty cycle of 78%. Operating across a wide temperature range of -40°C to +150°C, it utilizes an eSIP-7C package for through-hole mounting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power MOSFET with advanced fault protection including overcurrent, overvoltage, and thermal shutdown.
• Features multi-mode PWM control that maximizes efficiency across all load conditions while reducing EMI via frequency jittering.
• Includes user-programmable output overvoltage protection capable of latching or non-latching shutdown with fast AC reset.

AC DC Converters, Offline Switchers Applications

• Universal input adapters
• Monitor and display power supplies
• General purpose offline power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'EG' corresponds to the eSIP-7C package configuration as defined in the manufacturer datasheet. Confirm RoHS compliance status and check for any recent Package Change Notices (PCN) regarding assembly sites or shipping flexibility updates. Ensure the ordering part number matches the required lead time and packaging type specified by the authorized distributor.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a compact, high-reliability solution with integrated protection features. The choice between 66 kHz and 132 kHz operation should be based on transformer size constraints versus efficiency requirements. Consider the eSIP-7C package dimensions if space is limited, noting that no heat sink is required for lower power outputs within the universal input voltage range.

AC DC Converters, Offline Switchers Part Context

The TOP252EG belongs to the TOPSwitch-HX series, which enhances the EcoSmart feature set with extended power ranges and improved design flexibility. This family offers low thermal impedance junction-to-case characteristics, simplifying thermal management. The device represents a cost-effective integration of control logic and power switching, reducing system component count compared to discrete solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Compatible substitutes within the same family include TOP252EN and TOP252MN, provided the package type (eSIP-7C vs SIP-7 or SDIP-10) and pinout compatibility are verified against the specific application board layout and thermal requirements.